MICROLARM AN-3196B-MOD
LED ANNUNCIATOR
WITH MODBUSTM INTERFACE
OPERATING & SERVICE
MANUAL
Publication Number: 1080-730
Rev. B - 7/98
Signatu
re Not
Verified
Power Instruments
APPROVED
Digitally signed
by Engineering
Services
DN:
cn=Engineering
Services,
o=Rochester
Instrument
Systems, c=US
Date:
2003.04.28
10:59:14 -04'00'
Reason:
Document is
released
TABLE OF CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . TOC-5
SECTION 1 - RECEIPT & INSTALLATION
1.1 RECEIPT . . . . . . . .
1.2 MOUNTING . . . . . . . .
1.2.1
PANEL MOUNTING
1.2.2
WALL MOUNT . .
1.3 ELECTRICAL CONNECTIONS .
1.3.1
TERMINAL BLOCK
1.3.2
TERMINAL BLOCK
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TB1
TB2
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1-1
1-1
1-3
1-3
1-6
1-8
1-8
1-11
SECTION 2
2.1
2.2
2.3
2.4
- SYSTEM DESCRIPTION
. . .
GENERAL . . . . . . . . . .
SEQUENCE CONTROL MODULE . .
COMMON SERVICES MODULE . . .
SYSTEM BUS . . . . . . . . .
2.4.1
SERIAL DATA BUS .
2.4.2
FEEDBACK DATA BUS
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2-1
2-1
2-3
2-4
2-6
2-7
2-8
SECTION 3
3.1
3.2
3.3
- CONTROLS & OPERATION . . . . . . . .
PUSH-BUTTON SWITCHES . . . . . . . . .
STANDARD OPERATIONS . . . . . . . . .
OPTIONAL VARIATIONS . . . . . . . . .
3.3.1
PUSH-BUTTON SWITCH INTERLOCK
3.3.2
AUTO SILENCE . . . . . . . .
3.3.3
NON-FIRST-OUT OPTIONS . . .
TEST PROCEDURES . . . . . . . . . . .
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3-1
3-1
3-3
3-4
3-4
3-4
3-4
3-5
- SEQUENCE CONTROL MODULE . .
DIP SWITCHES . . . . . . . . .
TECHNICAL DATA . . . . . . . .
SPECIAL APPLICATIONS . . . . .
4.3.1
CONTACT SHARING . .
4.3.2
ALARM RESPONSE TIME
4.3.3
HOST SYSTEM INPUTS .
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4-1
4-2
4-5
4-8
4-8
4-8
4-9
SECTION 5 - COMMON SERVICES MODULE . . . . . . . . . .
5.1 OPTIONS . . . . . . . . . . . . . . . . . .
5.1.1
FLASH RATE . . . . . . . . . . . .
5.1.2
AUDIBLE AND RINGBACK ALARM CONTROL
5.1.3
PUSH-BUTTON SWITCH INTERLOCK . . .
5.1.4
OPTIONAL RELAY CONTACT USE . . . .
5.2 POWER SUPPLY CONNECTIONS . . . . . . . . . .
5.3 TECHNICAL DATA . . . . . . . . . . . . . . .
5.4 OUTPUT RELAYS . . . . . . . . . . . . . . .
5.5 CONFIGURATION CHANGES . . . . . . . . . . .
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5-1
5-2
5-3
5-3
5-3
5-4
5-5
5-6
5-7
5-8
3.4
SECTION 4
4.1
4.2
4.3
TOC-1
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Rochester Instrument Systems
SECTION 6 - MAINTENANCE . . . . . . . . . . . . . . . . . . . .
6.1 TROUBLE SHOOTING . . . . . . . . . . . . . . . . . .
SECTION 7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
- SERIAL COMMUNICATIONS INTERFACE . . . . . . . . .
MODBUS INTERFACE OVERVIEW . . . . . . . . . . . . .
USER CONNECTIONS AND INDICATORS . . . . . . . . . .
CONFIGURATION . . . . . . . . . . . . . . . . . . .
7.3.1
SETTING THE COMMUNICATIONS MODE . . . . .
7.3.2
SETTING THE MODBUS ADDRESSES . . . . . .
7.3.3
SETTING THE HOLDING REGISTER . . . . . .
7.3.4
SETTING READ/WRITE POINTS . . . . . . . .
SLAVE MODE OPERATION . . . . . . . . . . . . . . .
MASTER MODE OPERATION . . . . . . . . . . . . . . .
OVERVIEW OF AN-3196B-MOD MODBUS APPLICATION . . . .
7.6.1
ASCII MODE . . . . . . . . . . . . . . .
7.6.2
ASCII MESSAGE FRAMING . . . . . . . . . .
7.6.3
LONGITUDINAL REDUNDANCY CHECK (LCR) . . .
7.6.4
RTU MODE . . . . . . . . . . . . . . . .
7.6.5
RTU MESSAGE FRAMING . . . . . . . . . . .
7.6.6
CYCLICAL REDUNDANCY CHECK (CRC) . . . . .
MODBUS FUNCTION CODES SUPPORTED BY THE AN-3196B-MOD
7.7.1
03 READ HOLDING REGISTERS . . . . . . . .
7.7.2
06 PRESET SINGLE REGISTER . . . . . . . .
7.7.3
07 READ EXCEPTION STATUS . . . . . . . .
7.7.4
16 (10HEX) PRESET MULTIPLE REGISTERS . .
7.7.5
17 (11 HEX) REPORT SLAVE ID . . . . . . .
7.7.6
EXCEPTION RESPONSE . . . . . . . . . . .
TOC-2
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6-1
6-3
7-1
7-1
7-3
7-5
7-5
7-6
7-8
7-9
7-10
7-10
7-10
7-10
7-10
7-11
7-12
7-12
7-13
7-14
7-14
7-15
7-17
7-18
7-19
7-20
LIST OF APPENDICES
APPENDIX
APPENDIX
APPENDIX
APPENDIX
APPENDIX
APPENDIX
A
B
C
D
E
F
ISA SEQUENCE CHARTS
ORDER CODE DEFINITION AND SPECIFICATIONS
SPARE PARTS
ELECTROSTATIC DISCHARGE
REPAIRS AND WARRANTY
ENGINEERING DRAWINGS
LIST OF FIGURES
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
1-1
1-2
1-3
1-4
1-5
1-6
1-7
1-8
2-1
3-1
4-1
7-1
7-2
7-4
ANNUNCIATOR FRONT AND REAR VIEWS . . . .
PANEL MOUNT DIMENSIONS . . . . . . . . .
WALL MOUNT DIMENSIONS . . . . . . . . . .
TB1 CONNECTIONS . . . . . . . . . . . . .
CONNECTIONS FOR TERMINAL BLOCK TB2 . . .
CONNECTIONS FOR REFLASH OUTPUTS . . . . .
AUDIBLE DEVICE CONNECTIONS . . . . . . .
REMOTE PUSH-BUTTON SWITCH CONNECTIONS . .
SERIAL DATA AND FEEDBACK BIT ASSIGNMENTS
ANNUNCIATOR KEYPAD . . . . . . . . . . .
DIP SWITCH FUNCTIONS . . . . . . . . . .
AN-3196B-MOD-MOD BACKPLANE . . . . . . .
CONNECTION DIAGRAM FOR SERIAL CABLE . . .
SWITCH S5 SETTINGS . . . . . . . . . . .
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1-4
1-5
1-6
1-9
1-11
1-12
1-12
1-14
. 2-7
. 3-1
. 4-2
. 7-3
. 7-4
. 7-6
LIST OF TABLES
Table 2-1
Table 5-1
SYSTEM BUS WIRE ASSIGNMENTS . . . . . . . . . . . . 2-6
COMMON SERVICES MODULE OPTIONS DIP SWITCH 1 . . . . 5-2
TOC-3
Rochester Instrument Systems
TOC-4
AN-3196B-MOD Annunciator
INTRODUCTION
INTRODUCTION
The Rochester Instrument Systems, Model AN-3196B-MOD MicroLarm Annunciator
is a self-contained, LED annunciating system. It is used for monitoring, indicating, and
communicating via serial data, the conditions of up to twelve inputs. The unit is multimicroprocessor based and is designed to provide long term, efficient operation.
This manual gives detailed information on installation, operation, and maintenance of
the system. We recommend that everyone involved with installation or maintenance of this
equipment read and be familiar with the entire manual. Operating personnel should read
and be familiar with at least "Section 3 - Controls & Operation".
The sections of this manual which deal with modifications and maintenance assume
a basic knowledge of servicing electronic equipment. The installation section also assumes
a basic knowledge of mechanical and electrical maintenance skills.
Each Annunciator can be custom configured for a specific application. "Appendix
F" contains the Engineering Drawings for this specific Annunciator. "Appendix A" shows
the ISA Sequence Charts which are pertinent to this equipment. "Appendix B" shows the
MicroLarm Order Code Specifications and "Appendix C" gives Spare Parts Information.
"Appendix E" gives information of parts returns and warranties. "Appendix D" gives
specific information pertinent to working with equipment which can be damaged by
Electrostatic Discharge.
Rochester Instrument Systems fully supports its systems with in-house customer
service and field service staffs. In addition, for a fee, Rochester Instrument Systems can
provide training programs for your personnel, start-up assistance, and additional instruction
manuals. Contact the factory for further information.
TOC-5
Rochester Instrument Systems
TOC-6
AN-3196B-MOD Annunciator
RECEIPT & INSTALLATION
SECTION 1 - RECEIPT & INSTALLATION
The Rochester Instrument Systems, Model AN-3196B-MOD MicroLarm, Selfcontained, LED, Annunciator is a high-reliability, multi-microcomputer based, 12-point,
monitoring and signaling system with MODBUSTM communications capability. It utilizes
microcomputer technology to monitor field contact conditions. Alarm conditions indicated
by the monitored contacts are displayed by Light Emitting Diodes (LED's). In addition, the
Annunciator can activate audible alarms and auxiliary output contacts.
C A U T I O N
ELECTRONIC DEVICES CAN BE DAMAGED IF DROPPED
OR IMPACTED. HANDLE WITH CARE.
1.1
RECEIPT
Inspect the shipment when the unit is first received. Check for any opened or
damaged containers. Check the shipment against the Packing List or Bill of Lading and
verify that the shipment includes all containers listed.
NOTE
REPORT ANY SHIPPING DAMAGES OR SHORTAGES
TO THE CARRIER AT THE TIME OF RECEIPT.
Open each container and check the contents against its respective Packing List. Inspect
each of the components. Look for scratches or dents, loose or dangling parts, or other
obvious damage.
Each annunciator comes assembled as a unit. There are two modules inside each
unit, attached to the front faceplate. Make sure the faceplate assembly is securely seated
in the annunciator enclosure and the knurled screw toward the bottom of the faceplate is
1-1
Rochester Instrument Systems
tight. Check the Lamacoid legend plates, used to label each LED, to make sure they are as
specified by your order. (Refer to "Appendix B - Order Code Definition" for model
definition.)
Report any damaged, missing, or incorrect items to:
CUSTOMER SERVICE DEPARTMENT
ROCHESTER INSTRUMENT SYSTEMS, INC.
255 North Union Street
Rochester, New York 14605 USA
Telephone: (716)263-7700
Fax: (716)262-4777
ROCHESTER INSTRUMENT SYSTEMS, LTD.
Schooner Court Crossways Business Park
Dartford, Kent
DA2 6QQ, United Kingdom
Telephone: (441) 322 287500
Fax: (441)322 282000
If you anticipate the need to return any or all of the components, save all
packing materials for re-shipment. Refer to the "Procedures for Factory Repair and
Return" in "Appendix E - Repairs and Warranty" for proper procedures and
addresses for returning goods.
1-2
AN-3196B-MOD Annunciator
RECEIPT & INSTALLATION
1.2
MOUNTING
The AN-3196B-MOD Annunciator is fully self-contained, including an optional
integral power supply. It is designed to be either panel mounted or surface mounted
with the optional surface mounting kit. The unit may also be mounted in a NEMA
Class 4 or Class 12 enclosure where severe environmental conditions exist.
W A R N I N G
THE BACK OF THE ANNUNCIATOR ASSEMBLY HAS
MANY EXPOSED ELECTRICAL CONTACTS. WHEN
CHOOSING A MOUNTING LOCATION FOR THIS UNIT,
MAKE SURE THESE CONTACTS WILL NOT TOUCH
OTHER ITEMS AND THAT NO ONE WILL BE ABLE TO
ACCIDENTALLY TOUCH THESE CONTACTS WHEN THE
UNIT IS IN SERVICE.
1.2.1 PANEL MOUNTING
When choosing a location for mounting the AN-3196B-MOD Annunciator,
consider the physical size and weight of the unit and the environment of the location
as well as the visibility of the LED display. The chassis of the annunciator measures
3.73" wide by 12.95" high by 5.87" deep (94.74 mm x 329 mm x 149.2 mm).
The unit weighs 9 lbs. (4.08 kg). It is designed to rest on the sill of the panel
cutout. Therefore, the material left, after the cutout is made, must be strong enough to
support the unit's weight without failing. The unit mounts with panel clamps from the
rear of the unit and all connections are made to the terminal blocks at the rear of the
unit. Therefore, the mounting location must allow full access to the rear of the
assembly.
1-3
Rochester Instrument Systems
3.73
(94.74)
4.00
(101.6)
5.32
(135.28)
12.95
(328.93)
US
MODB
PORT
TB2
DIMENSIONS: IN
(mm)
Figure 1-1 Annunciator Front and Rear Views
1-4
1.00
(25.4)
TB1
.50
(12.7)
AN-3196B-MOD Annunciator
RECEIPT & INSTALLATION
To mount the unit, first mark the cutout dimensions on the panel where the
annunciator is to be mounted. (Refer to Figure 1.2 for specific dimensions.) Be sure
to allow enough room around the cutout for the front mounting bezel to miss any other
components on the panel. Cut out the panel material.
The annunciator is shipped with the panel clamps mounted to the unit.
Remove these panel clamps from the annunciator and position the unit in the cutout.
From the rear of the unit, place the panel clamps into the notches at the top and
bottom of the annunciator. Finger tighten both clamps until the unit is secured in the
panel. Use a screwdriver to finish securing the unit.
Figure 1-2 Panel Mount Dimensions
1-5
Rochester Instrument Systems
1.2.2 WALL MOUNT
When the AN-3196B-MOD is to be wall mounted, a separate metal enclosure is
supplied for mounting. Mounting dimensions are 4.00" wide by 15.88" high by 8.90"
deep (101.6 mm x 403.4 mm x 226.2 mm). With this enclosure, the assembly weighs
15 lbs. (6.80 kg).
Determine where the annunciator is to be mounted and mark the location for
the four mounting holes for the enclosure brackets. (Refer to Figure 1.3 for mounting
dimensions for these holes.) The brackets are designed to accept four #10 screws. If
wall anchors are being used, each anchor should be suitable for at least a 7-1/2
pound load. This will give a mounting-weight Factor of Safety of 2.
Figure 1-3 WALL MOUNT DIMENSIONS
1-6
AN-3196B-MOD Annunciator
RECEIPT & INSTALLATION
Insert the screws through the holes in the mounting brackets and fasten
securely to the wall. Remove the panel clamps from the annunciator and position the
unit in the opening in the enclosure. From the rear of the unit, place the panel clamps
into the notches at the top and bottom of the annunciator. Finger tighten both clamps
until the unit is secured in the enclosure. Use a screwdriver to finish securing the unit.
W A R N I N G
ALL ELECTRICAL WIRING FOR THE ANNUNCIATOR
CONNECTS TO THE EXPOSED CONTACTS ON THE BACK
OF THE UNIT.
PROVISION MUST BE MADE FOR
ACCESS TO THESE TERMINALS TO MAKE THE WIRING
CONNECTIONS. HOWEVER, CARE MUST ALSO BE
TAKEN TO ASSURE THAT NO ONE WILL BE ABLE TO
ACCIDENTALLY TOUCH THE CONTACTS WHEN THE
UNIT IS IN SERVICE.
1-7
Rochester Instrument Systems
1.3
ELECTRICAL CONNECTIONS
Electrical wiring to the annunciator connects to the two terminal blocks and one
9-pin D-style connector on the back of the unit. Field contact connections are made to
Terminal Block TB1 as shown in Figure 1.4. Connections made to Terminal Block
TB2 as shown in Figure 1.5. Connections made to the MODBUS Serial
Communications Interface are detailed in Section 7. Refer to "Appendix F Engineering Drawings" for the specific wiring connection patterns for this
annunciator. Also, refer to "Section 4 - Sequence Control Module" and "Section 5
- Common Services Module" and “Section 7 - Serial Communications Interface”
for additional information on options and settings which can affect the wiring
connections.
This unit requires a proper ground. A factory installed jumper is provided from
the bottom terminal of Terminal Block TB2 to the chassis ground stud between TB1
and TB2. Check to make sure this jumper is in place and secured. Connect electrical
ground to the chassis ground stud before applying power to the annunciator.
W A R N I N G
THIS UNIT MUST BE PROPERLY GROUNDED.
FAILURE TO PROVIDE AND USE A PROPER GROUND
CONNECTION CAN RESULT IN DAMAGE TO THE
ANNUNCIATOR.
1.3.1 TERMINAL BLOCK TB1
Terminal Block TB1 has 18 terminals. 12 of these terminals are labeled 1
through 12 and are the connection points for the return side from each of the 12
possible input points. Each of these input points must be a normally open or normally
closed contact which is activated when the monitored point goes into alarm.
1-8
AN-3196B-MOD Annunciator
RECEIPT & INSTALLATION
TB1
TB1
FC1
1
FIELD CONTACT VOLTAGE
2
FIELD CONTACT VOLTAGE
VA
120 / 125V
3
VB
VB
FC5
VC
FC7
7
VD
FC9
9
NOTE: FIELD CONTACTS MAY
BE ANY COMBINATION
OF N. O. OR N. C.
FC11
FC10
10
VE
FC11
11
FC12
12
FC9
9
FC10
10
11
FC8
8
VD
VE
FC7
7
FC8
8
BE ANY COMBINATION
OF N. O. OR N. C.
FC6
6
VC
NOTE: FIELD CONTACTS MAY
BE ANY COMBINATION
N. O. CONTACTS
OR N. C. MAY
NOTE:OF
FIELD
FC5
5
FC6
6
FC4
4
24V
5
FC3
3
48V
FC4
4
24V
FC2
2
VA
120 / 125V
FC3
48V
FC1
1
FC2
FC12
12
VF
VF
(L/+)
(N/-)
(L/+)
}
}
(N/-)
FCV SUPPLY
(TYP. 6 PLACES)
FCV SUPPLY
EXTERNALLY SUPPLIED FCV (TYP. 6 PLACES)
FCV SUPPLY
(TYP. 6 PLACES)
EXTERNALLY SUPPLIED FCV
ONE GROUP / COMMON RETURN
SIX GROUPS / INDEPENDANT RETURNS
EXTERNALLY SUPPLIED FCV
SIX GROUPS / INDEPENDANT RETURNS
TB1
1
FIELD CONTACT VOLTAGE
2
FCV
125VDC
FC1
FC2
VA
3
24V
4
FCV
FC3
FC4
VB
5
6
FCV
FC5
FC6
VC
7
8
FCV
NOTE: FIELD CONTACTS MAY
NOTE:
CONTACTS MAY
BE FIELD
ANY COMBINATION
ANY
OF BE
N. O.
ORCOMBINATION
N. C.
OF N. O. OR N. C.
FCV
FC7
FC8
VD
9
10
FC9
FC10
VE
11
12
FCV
FC11
FC12
VF
INTERNALLY SUPPLIED FCV
Figure 1-4
TB1 CONNECTIONS
1-9
Rochester Instrument Systems
The Field Contact Voltage (FCV) is supplied by the six terminals labeled "VA"
through "VF" on Terminal Block TB1. This supply may be 24, 48, or 125 VDC. Refer
to Figure 1.5 for identification of the proper supply and return terminals for each of the
field contact points.
Note optional Isolated/AC Input configuration, in which an AC or DC voltage
originating in the field is applied to the input terminals, with the return side connected
to "VF (RET)". As a variation of this, six mutually isolated groups may be set up,
having two inputs and one return terminal each. Standard voltage levels which may
be accepted are 120 VAC or 24, 48, or 125 VDC. See "Section 4 - Sequence
Control Module" for details on input circuit set up and operation.
Connect each of the field contacts to the appropriate terminals on Terminal
Block TB1. Refer to "Appendix F - Engineering Drawings" to determine which
device is designed to be monitored by each input point. Verify that the Legend Plate
for each input matches the field contact being connected to that terminal.
W A R N I N G
IMPROPER LABELING OR CONNECTIONS COULD
RESULT IN DAMAGE TO THE DEVICES BEING
MONITORED DUE TO INCORRECT RESPONSE.
1-10
AN-3196B-MOD Annunciator
RECEIPT & INSTALLATION
1.3.2 TERMINAL BLOCK TB2
Terminal Block TB2 is used for control signals and other external connections
to the annunciator. These outputs include Critical and Non-Critical Reflash, Critical
and Non-Critical Alarm Audible, and Ringback Audible. Devices or device inputs
controlled by these outputs connect to Terminals 6 through 15. Terminals 1 through 5
connect to remote push-button switches when these are utilized. Terminals 16 and 17
connect to the prime supply voltage. Terminal 18 is a factory ground connection.
Voltage to power external devices or device inputs may be supplied from an
external power source, or from the internal annunciator 24 VDC source. The internal
24 VDC source is capable of providing 0.10 Amps. and is brought out to TB2-4 (+24V)
and TB2-14 (24V RET) for customer connections. TB2-4 is used to power external
push-button switches. The relay contacts are rated for 5A at 24 VDC/120 VAC, 3A,
240 VAC, or 0.1A at 125 VDC maximum.
Figure 1-5 CONNECTIONS FOR TERMINAL BLOCK TB2
The Critical and Non-Critical Reflash outputs can each be connected as
normally open or normally closed (see Figure 1.6).
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Figure 1-6 CONNECTIONS FOR REFLASH OUTPUTS
The Critical/Non-Critical Alarm Audible and the Non-Critical/ Ringback Audible are
factory set as normally open or normally closed if specified by the Customer Order
Specifications. If not specified, these contacts are shipped as normally open. The
contacts can be changed as required (see Figure 1.7).
Figure 1-7 AUDIBLE DEVICE CONNECTIONS
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AN-3196B-MOD Annunciator
RECEIPT & INSTALLATION
Connect each of the outputs to their proper terminals. Refer to "Appendix F Engineering Drawings" for the correct terminal connections for this annunciator.
Also, see "Section 5 - Common Services Module" for a complete description of the
output options and how they can be altered.
The annunciator is supplied with an integral, membrane switch pad for pushbutton switch control. However, there are occasions when it is desirable to have the
push-button switches at a location which is remote from the annunciator unit. When
this is necessary, the remote push-button switches are connected to the terminals on
Terminal Block TB2 as shown in Figure 1.8.
There are five possible supply voltages to the AN-3196B-MOD annunciator:
120 VAC, 240 VAC, 24 VDC, 48 VDC, and 125 VDC. Each annunciator is designed
for a specific prime supply voltage and different internal modifications must be made
for each prime supply voltage. When 24 VDC supply voltage is used, this supply
voltage is used directly within the unit.
When 125 VDC or 48 VDC supply voltage is used, an invertor power supply
produces the proper internal voltage. When 120 VAC or 240 VAC supply voltage is
used, two transformers, connected in parallel or series, provide the proper internal
voltage.
Using a different prime supply voltage will cause damage to the unit. If a
change in prime supply voltages is desired, the annunciator should be returned to the
factory for alterations. Refer to the Customer Order Specifications and "Appendix F Engineering Drawings" for the design voltage of this unit.
Connect the proper prime supply voltage to Terminals 16 and 17. If the prime
supply voltage is 24, 48, or 125 VDC, make sure the positive side is connected to
Terminal 16. It is also important to note that, when the prime supply voltage is 24
VDC, only non-isolated 24 VDC is available for the Field Contact Voltage. For power
sources other than 24 VDC, the Field Contact Voltage is isolated from the prime
power and may be either 24 VDC or 125 VDC.
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Figure 1-8 REMOTE PUSH-BUTTON SWITCH CONNECTIONS
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AN-3196B-MOD Annunciator
SYSTEM DESCRIPTION
SECTION 2 - SYSTEM DESCRIPTION
The Rochester Instrument Systems, Model AN-3196B-MOD Annunciator is a
multi-microcomputer based system with MODBUSTM communications capability used
to centrally monitor up to twelve field conditions. The operations are based on
proprietary microcomputers which are incorporated into two modules. These modules
provide the interface for the inputs, determine the sequence of operations, and
generate various output signals.
The AN-3196B-MOD Annunciator will monitor conditions from any device which
can actuate a contact or produce a voltage (24/48/120/125: DC or AC). The
Communications Interface provides the ability either to actuate or monitor each of the
twelve annunciator points by means of MODBUS-compatible serial data. A few typical
applications would include monitoring pressure sensing devices, flow, temperature,
door contacts, vibration sensors, relay contact closure, levels, limit switches, speed,
and process sequences. The full list of possible uses is unlimited.
2.1
GENERAL
The following is an abbreviated general description of the AN-3196B-MOD
Annunciator. For complete details on this specific unit, refer to the Customer Order
Specifications and to "Appendix B - Order Code Definition and Specifications".
INPUTS:
May be in any one of the following configurations:
a)
1 to 12 sets of dry contacts; each may be normally open or normally
closed. One Field Contact Voltage terminal is provided for every two
input terminals.
b)
1 to 12 voltage inputs (individual inputs may have voltage normally
present or absent). One terminal provided for common voltage return.
c)
Same as (b), but inputs may be distributed across six mutually isolated
groups of two inputs each, having one voltage return each.
Note: The current required for each input is approximately 1.5 mA.
d)
MODBUS-compatible serial alarm data to the Communications Interface
Port.
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OUTPUTS:
a)
1 LED indicator per input point.
b)
Relay contacts for Critical/Non-Critical Audible Outputs, Critical/NonCritical Reflash Outputs, and Ringback Output.
c)
Optional remote mounted audible devices.
d)
MODBUS-compatible serial alarm data from the Communications
Interface Port.
CONTROLS:
2.2
a)
Integral Membrane Switch Pad with "T" (Test), "A" (Acknowledge), "S"
(Silence), and "R" (Reset) push-button switches.
b)
Internal switches and solder-in jumpers.
SEQUENCE CONTROL MODULE
Inputs are provided to the Sequence Control Module (SCM) in the form of
voltages which are switched on or off in the field, according to the status of the
devices switching them. Inputs to the SCM may also be controlled or monitored via
the MODBUS Serial Communications Interface, as described in Section 7. The SCM
monitors and detects changes in the status of each input by sensing presence or loss
of the corresponding voltage. The microcomputer in the module responds by storing
status information in its memory, sending certain alarm status information to the
Common Services Module by way of the Feedback Bus, and activating the proper
LED (Light Emitting Diode) according to the specified sequence.
Each Annunciator can monitor up to twelve inputs. Switches on the module
allow the user to select each input as having normally open or normally closed
contacts (voltage normally present or absent). Switches also allow the user to define
each input as Critical or Non-Critical.
Each individual input may also be configured to respond as a First-Out Alarm.
If a process has several monitored points, it may be important to know which point in
the process caused the problem, even though several other points may have
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AN-3196B-MOD Annunciator
SYSTEM DESCRIPTION
subsequently gone into alarm. Configuring each of these points as First-Out Alarms
allows you to know which point went into alarm first. This First-Out Alarm will have a
different display than the other alarmed points.
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2.3
COMMON SERVICES MODULE
The microcomputer of the Common Services Module (CSM) can be considered
the Central Processing Unit (CPU) for the Annunciator. Information is received from
the Sequence Control Module, the system push-button switches, and the serial
communications port. In response, signals are sent back to the Sequence Control
Module and to various output devices.
The push-button switches are one of the operator's means of controlling the
Annunciator System. Four push-button switches are used as operator inputs to the
system. The push-button switches are the "T" (Test), "S" (Silence), "A" (Acknowledge), and "R" (Reset) push-button switches. If remote push-button switches are
used, they are connected to the Common Services Module using Terminals 1 through
5 on Terminal Block TB2. The annunciator can also be controlled by the Serial
Communications Port as described in Section 7.
The Test push-button switch simultaneously simulates alarm inputs on all input
points. All points should display on alarm when this push-button switch is pushed. In
addition, all points configured for First-Out Alarm should be displayed as First Alarms.
After the Test push-button switch has been pressed, the other annunciator pushbutton switches are used to test the balance of the system operation.
The Silence push-button switch is used to turn off all audible alarms. It does
not affect the status of the visual display. It does not reset the alarm status memory.
The Acknowledge push-button switch signals the operator's recognition of a
new alarm. It causes a transition in the visual display from the Alarmed to the
Acknowledged state and will silence any active audible alarm.
The Reset push-button switch causes the display to return to the Normal state
from an Acknowledged state in manual reset sequences. If the unit has a Ringback
Sequence, the push-button switch is used to acknowledge the automatic Return-toNormal state. (A Ringback sequence is one in which another audible alarm sounds,
accompanied by another visual display, when the system returns to normal.)
The Common Services Module also controls various output relays. There are
four relays available and six possible output types. The Annunciator System can have
up to two audible alarms from the three types available: Critical Audible, Non-Critical
Audible, and Ringback Audible. The two audible alarms can have different devices so
the type of alarm can be determined by the sound.
The system also has two Reflash Relays for driving remote Annunciators. One
of these is used for Critical-designated points and one for Non-Critical points. In place
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AN-3196B-MOD Annunciator
SYSTEM DESCRIPTION
of either of the Reflash outputs, the system could be set up with a Power Monitor.
This circuit would indicate if there is a loss of logic power.
Options are factory set based on the order specifications. Refer to "Section 5 Common Services Module" for detailed information on these options. Refer to the
Customer Order Specifications and "Appendix F - Engineering Drawings" for details
on your system.
The Common Services Module also supplies information to the Sequence
Control Module by way of the Serial Data Bus. This consists of the flash rates, pushbutton switch status and the First-Out Blocking Bit. (First-Out Blocking prevents
Subsequent Alarms from displaying in the same manner as the First Alarm.)
DIP switch assemblies on the Common Services Module select various options
for the Annunciator. These options include Optional Flash Rate, Automatic Silence,
Push-button Switch Interlock, and Pulsed Audible Alarm options. The selections affect
all twelve inputs.
2.4
SYSTEM BUS
The System Bus is carried between the Common Services Module and the
Sequence Control Module by means of a flat ribbon cable. The bus provides a unified
means of interconnecting the two modules so that synchronization of related functions
may be accomplished. The wire assignments of the bus are listed in Table 2.1 below:
Table 2-1 SYSTEM BUS WIRE ASSIGNMENTS
PIN NO.
DESCRIPTION
5
SERIAL DATA OUT
4
RESET
1,15
+5V
6
FEEDBACK DATA
3,7,14
SPARE (UNUSED)
2,10-13,14
LOGIC COMMON
8
FIELD CONTACT VOLTAGE SUPPLY
9
FIELD CONTACT VOLTAGE RETURN
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The two data buses -- Serial Data and Feedback Data -- provide continuous
control and status information throughout the system. They are logic-level buses.
They switch back and forth from a logic low level (near 0V) to a logic high level (near
+5V). Each bus provides a repetitive sequence of data bits, each of which is
essentially a high or low level on the bus, for a specific period of time. Therefore, an
oscilloscope is required to monitor these buses.
2.4.1 SERIAL DATA BUS
The Serial Data (SERD) output from the Common Services Module is a bit
stream consisting of information to control flash rates, push-button switch status, FirstOut blocking bus, and synchronization of all microcomputers in the AN-3196B-MOD
Annunciator. Figure 2.1 gives a schematic representation of the Serial Data bit
stream and its relation to the Feedback line.
Figure 2-1 SERIAL DATA AND FEEDBACK BIT ASSIGNMENTS
The Serial Data Bus is positive logic. A high electrical level (+5V) is a logic
"On" or "1". A low electrical level (0V) is a logic "Off" or "0". Each bit lasts for 1.6
milliseconds (ms). The entire series repeats every 26 ms.
The first bit is "Frame Sync" and is always "On" (1). The second bit is a space
which is always "Off" (0). Next are the push-button switch bits: Test, Acknowledge,
Silence, Reset, and First-Out Reset. If a push-button switch is activated, its
corresponding bit will be "On" (1). If the push-button switch is not activated, its
corresponding bit will be "Off" (0).
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AN-3196B-MOD Annunciator
SYSTEM DESCRIPTION
The next bit, after First-Out Reset, is First-Out Blocking. This is a retransmission to the Sequence Control Module's microcomputers of the First-Out
Blocking bit on the Feedback Data bus. This bit is turned on by one of the
microcomputers when an input which is designated as a First-Out input goes into
alarm. It will force all other points set for First-Out sequence into Subsequent Alarm
mode instead of First Alarm mode.
The last two bits are the two Flash Sync bits (Flash 1 and Flash 2). They are
each set by the DIP switch positions on the Common Services Module to be either a
fast or slow flash rate. After a point has gone into alarm, the sequence selected for
that point will put the corresponding LED under control of one of these two flash rates.
When the corresponding bit is "On", the LED will be on. When the bit is "Off", the LED
will be off.
2.4.2 FEEDBACK DATA BUS
The Feedback data bus is controlled by the Sequence Control Module. It is
"read" by the Common Services Module. The Feedback Data Bus is negative logic. A
low electrical level (0V) is a logic "On" or "1". A high electrical level (+5V) is a logic
"Off" or "0".
Any of the Sequence Control Module's microcomputers may force a bit "On"
(0V), but only "On". They may not force a bit "Off". This prevents a conflict from some
microcomputers trying to force a bit "Off" while others are trying to force the bit "On".
If the bit is not being forced "On", it will be held "Off" by a biasing resistor.
The Feedback Data is synchronized with the Serial Data so that the timing
relationship will always be the same between the two. As with the Serial Data, each
bit lasts for 1.6 milliseconds (ms). The entire series repeats every 26 ms.
The first Feedback bit begins midway through the Test bit time frame of the
Serial Data. This is the Critical Audible bit. It goes "On" whenever a point which has
been designated as Critical goes into alarm. A Silence or Acknowledge command will
reset this bit.
The Alarm Audible bit operates the same way for inputs designated as NonCritical. The Ringback Audible bit is driven "On" upon a return-to-normal conditions
for Ringback sequences. This is reset by the Silence or Reset push-button switches.
The audible bits control the audible devices through the Common Services Module.
The Common Services Module exercises some intermediate control such as defeating
the Alarm Audible while a Critical Audible is in progress.
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The audible bits are followed by the point-on-alarm bits for Non-Critical and
Critical points. These bits control the Reflash Relays on the Common Services
Module. Next is the First-Out blocking bit which is activated whenever the first point of
a First-Out group goes into alarm. This is retransmitted back to the Sequence Control
Modules on the Serial Data Bus.
The First-Out blocking bit is followed by a marker bit which is always "On".
Another pulse occurs toward the end of the cycle. This is a very short duration timing
reference pulse.
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AN-3196B-MOD Annunciator
CONTROLS & OPERATION
SECTION 3 - CONTROLS & OPERATION
The AN-3196B-MOD Annunciator is microcomputer based. As such,
sequencing is controlled by the microcomputers in the various modules. Options may
be selected at the time of purchase or set up during installation or servicing. This
makes the Visual Annunciator extremely easy to apply to various operating
requirements.
3.1
PUSH-BUTTON SWITCHES
The manual controls for the Visual
Annunciator consist of four push-button switches.
These are integrally mounted in the annunciator
on the annunciator faceplate, but may be
connected in parallel with additional remotelylocated push-button switches. The pads on the
annunciator are labeled with the first letter of the
switch label as indicated in Figure 3.1. The
push-button switches serve the following
functions (note possible exceptions under
"Optional Variations"):
Figure 3-1 ANNUNCIATOR
KEYPAD
T (TEST):
Press this push-button switch to momentarily simulate
abnormal process conditions on all alarm points. All LED's
will illuminate. All inputs configured as First-Out alarms will
illuminate with the First-Out display. If some points have
been designated Critical, the Critical Audible will come on
and remain on following release of the Test push-button
switch. The Non-Critical Audible will be on only while the
Test push-button switch is depressed. If no Critical points
have been designated, the Non-Critical Audible will come
on and remain on after the Test push-button switch is
released.
S (SILENCE):
Pressing this push-button switch causes a sequence
transition which turns off all audible alarms. This
push-button switch does not affect the visual indication or
acknowledge the alarm.
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A (ACKNOWLEDGE):
Press this push-button switch to acknowledge an alarm.
The displays will change indicating that the operator is
aware of the alarm condition.
R (RESET):
Press this push-button switch to return the display to its
normal state after the alarm conditions have been
corrected. Where Ringback sequences are present, this
push-button switch silences the Ringback Alarm. It also
resets First-Out status so that a point which came on alarm
in the First Alarm mode will change to Subsequent Alarm
mode. This allows a new alarm to again be displayed in
First Alarm mode.
Note: Acknowledge and Reset will be monitored and sent out on the Communications
Interface serial data port when the corresponding pushbutton is pressed. Test
and Silence controls are NOT recognized by MODBUS and can only be
activated manually by the keypad.
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AN-3196B-MOD Annunciator
CONTROLS & OPERATION
3.2
STANDARD OPERATIONS
When the Visual Annunciator detects a change in an input signal, it will indicate
an alarm on the display, and send the information to the MODBUS port (refer to
Section 7 for MODBUS operation). There are four possible forms of visual display
illumination: steady, slow flash, fast flash and intermittent flash. Each of these will
have a particular significance which is user definable according to the sequence
selection. The operator should become familiar with each form of illumination and
what it means.
In addition to the visual display, an audible alarm may sound. This audible
alarm could have one of two sounds depending on whether the input has been
designated as a Critical or Non-Critical Alarm. The operator should become familiar
with the difference in sound between the two types of alarms.
After the audible alarm has been silenced, the actuation of another input will
cause the audible alarm to sound again. In this way, the Annunciator can continue to
monitor the other inputs and warn of changing conditions, even if the first condition is
not yet corrected.
Upon hearing an audible alarm, check the Visual Annunciator to determine the
cause of the alarm. Silence the audible alarm and take whatever steps necessary to
begin corrective action. If a First-Out signal is indicated, note which display is so
indicated and which additional points, if any, are in Subsequent Alarm mode. Press
the Reset push-button switch to change the First Alarm display to a Subsequent Alarm
display. If additional inputs are actuated, the first of these will again show the First
Alarm display.
After corrective action has begun, press the Acknowledge push-button switch to
change the alarm to the Acknowledged mode. The display will change but will still be
illuminated until the condition returns to normal.
When the inputs have returned to normal, press the Reset push-button switch
(required for manual reset sequences). The Visual Display illumination will go out. If
any input is still in an alarm state when the Reset push-button switch is pressed, its
display illumination will not go out.
The annunciator can have a Critical Reflash and a Non-Critical Reflash output.
The Reflash output will be open if there are no points on alarm in the system. The first
point on alarm will cause the Reflash Relay to close.
After silencing or acknowledging the alarm, any subsequent alarm will cause
the Reflash Relay contact to open for approximately 0.5 seconds and then close
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again. The system must be silenced or acknowledged after each alarm. After all
points have returned to normal, the relay contact will open and remain open until
another alarm occurs.
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AN-3196B-MOD Annunciator
CONTROLS & OPERATION
3.3
OPTIONAL VARIATIONS
There are several options which can be selected which will affect the operating
procedures for the Visual Annunciator. These options are part of the ISA sequences
which can be chosen from DIP switch assembly S4 on the Sequence Control Module.
(Refer to "Section 4 - Sequence Control Module" and "Appendix F - Engineering
Drawings" for further details on the specific switches involved.) The following
discussion indicates the changes to the standard operations caused by these options:
3.3.1 PUSH-BUTTON SWITCH INTERLOCK
This option prevents the Annunciator from recognizing the Acknowledge
push-button switch input unless it is preceded by actuation of the Silence push-button
switch. When this option is chosen, the only allowable sequence of push-button
switches is Silence, Acknowledge, and Reset (if used). A new alarm will re-initialize
the push-button switch sequence.
3.3.2 AUTO SILENCE
This option allows for the automatic silencing of any audible alarm. After
approximately 30 seconds, the audible alarms will cease. The LED Display is not
affected. A new input actuation will cause the audible alarms to sound again.
3.3.3 NON-FIRST-OUT OPTIONS
For those ISA Sequences which do not utilize a First-Out response, Switch
positions 9 through 11 of S1 through S3 on the Sequence Control Module provide
additional options. These options include defeating the audible response for alarm
and ringback, steady display instead of flashing, and disabling the Acknowledge
function. These options can be individually selected for each group of four inputs.
Refer to Section 4.1 for details on selecting these options.
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3.4
TEST PROCEDURES
Start the system test procedure by pressing the Test push-button switch. An
abnormal process condition is simultaneously simulated on all inputs. All points will be
displayed on alarm. In addition, all points having a First-Out configuration will be
displayed as First Alarms.
Press each of the other push-button switches to complete the test sequence.
Observe the visual displays and audible alarms to determine if there are any LED or
circuit failures.
Hold the Test push-button switch down to cause all audible alarms, except
Ringback, to sound. Only the highest priority alarm will continue to sound when the
Test push-button switch is released. The Ringback audible alarm, if used, is activated
by depression of the Acknowledge push-button switch following the release of the
Test push-button switch.
W A R N I N G
THE TEST SEQUENCE MUST BE MANUALLY COMPLETED
TO ALLOW VISUAL DISPLAY AND AUDIBLE ALARMS
FOR ACTUAL ALARMS. DEPENDING ON THE SEQUENCE
CONFIGURATION SELECTED, THE OPERATOR MUST
ACTUATE THE ACKNOWLEDGE AND/OR RESET
PUSH-BUTTON SWITCHES.
During test sequence operations, Reflash Relay outputs will reflect only actual
alarm conditions. If an actual alarm occurs during the test sequence, the display,
audible alarm and First-Out order information is stored. As soon as the test sequence
is completed, the alarm condition will be initiated, even if the input has returned to
normal in the mean time. However, the Reflash signal for the actual alarm will
respond immediately, since it is not affected by the test sequence operations.
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AN-3196B-MOD Annunciator
SEQUENCE CONTROL MODULE
SECTION 4 - SEQUENCE CONTROL MODULE
W A R N I N G
STATIC ELECTRICITY IS ALWAYS PRESENT ON YOUR
BODY AND CLOTHING. THEREFORE, YOU MUST
EXERCISE CARE WHEN HANDLING STATIC SENSITIVE
ELECTRONIC ASSEMBLIES AND DEVICES. IMPROPER
HANDLING CAN CAUSE AN EXCESSIVE
ELECTROSTATIC DISCHARGE (ESD) WHICH CAN
DAMAGE OR DESTROY INTEGRATED CIRCUITS,
SEMICONDUCTORS, OR OTHER STATIC SENSITIVE
DEVICES. FOR FURTHER DETAILS AND DISCUSSION
ON ESD AND APPROPRIATE HANDLING TECHNIQUES,
SEE THE APPENDIX ON ESD.
The inputs are provided to the Annunciator as the presence or absence of a
voltage at each input terminal. The Sequence Control Module acts as the interface
between the inputs and the balance of the Annunciator. It monitors the inputs and
causes a response corresponding to a specified sequence.
When the condition of a field contact changes from normal to alarm for more
than 30 milliseconds, or if and alarm is posted via MODBUS, the corresponding
microcomputer recognizes it as a valid contact status change. The microcomputer
stores this information in Sequence Control Memory. It then processes the data in
accordance with the selected ISA Sequence settings and other information supplied
by the Common Services Module.
The corresponding Annunciator LED (Light Emitting Diode) is activated. Other
related outputs may also be activated, depending on the options selected.
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4.1
DIP SWITCHES
Figure 4-1 DIP SWITCH FUNCTIONS
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AN-3196B-MOD Annunciator
SEQUENCE CONTROL MODULE
The voltage provided to each input terminal may be normally present (Contact
Normally Closed), or normally absent (Contact Normally Open). In addition, the signal
being monitored by each input may be considered as Critical or Non-Critical. (There
can be one audible alarm for Non-Critical inputs and a second, different sounding,
audible alarm for Critical inputs.) The input may also be designated as part of a
First-Out grouping.
There is an 8-position DIP (Dual In-line Package) switch assembly (S4) and
three 12-position DIP switch assemblies (S1, S2, and S3) on the Sequence Control
Module. Switch assembly S4 controls the ISA Sequence for the all twelve inputs of
the annunciator. Switch positions 1 through 6 on S4 are used to select any of the
possible ISA Sequences as shown in the chart in Figure 4.1. The attributes of each
of these sequences is shown in "Appendix A - ISA Sequence Charts".
Input type selections are controlled by switch assemblies S1 (inputs 1 through
4), S2 (inputs 5 through 8), and S3 (inputs 9 through 12). Each switch assembly
controls the choice of normally open or normally closed, Critical or Non-Critical, and
First-Out or Non-First-Out for the four related inputs. Refer to "APPENDIX F - SCM
SCHEMATIC & ASSEMBLY DRAWING" for switch assembly locations. Refer to
“SECTION 6 - MAINTENANCE” for removal of modules from the chassis and switch
access.
Switch positions 1 through 4 on S1 control the choice of normally open (NO) or
normally closed (NC) for inputs 1 through 4 respectively. Switch positions 5 through 8
on S1 control the choice of Critical or Non-Critical for inputs 1 through 4 respectively.
Switch positions 9 through 12 on S1 control the choice of First-Out or Non-First-Out
for inputs 1 through 4 respectively.
Switch positions 1 through 4 on S2 control the choice of normally open (NO) or
normally closed (NC) for inputs 5 through 8 respectively. Switch positions 5 through 8
on S2 control the choice of Critical or Non-Critical for inputs 5 through 8 respectively.
Switch positions 9 through 12 on S2 control the choice of First-Out or Non-First-Out
for inputs 5 through 8 respectively.
Switch positions 1 through 4 on S3 control the choice of normally open (NO) or
normally closed (NC) for inputs 9 through 12 respectively. Switch positions 5 through
8 on S3 control the choice of Critical or Non-Critical for inputs 9 through 12
respectively. Switch positions 9 through 12 on S3 control the choice of First-Out or
Non-First-Out for inputs 9 through 12 respectively.
Determine the conditions required for each input and set the DIP switch
positions accordingly. For example, if the input contact for Point #1 will be normally
open (voltage absent), set DIP switch position 1 on S1 to "OFF". If it is a Critical
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alarm, set DIP switch position 5 on S1 to "ON". If it is part of a First-Out grouping, set
DIP switch position 9 on S1 to "ON".
For those ISA Sequences which do not utilize a First-Out response (A, A4, M,
R, and R12), switch positions 9 through 11 on S1, S2, and S3 serve secondary
functions.
1.
Turn switch position 9 on S1, S2, or S3 to "ON" to defeat
the Audible Alarms and Ringback Alarms for the four inputs
controlled by that switch during both alarm and test
conditions. The Critical audible alarm still functions
normally.
2.
Turn switch position 10 on S1, S2, or S3 to "ON" to cause
the LED's for the inputs controlled by that switch to come
on steady instead of flashing.
3.
Turn switch position 11 on S1, S2, or S3 to "ON" to disable
the Acknowledge function for the inputs controlled by that
switch. The Acknowledge push-button switch will neither
silence the audible alarm nor affect the visual output until
after the input returns to normal. The Silence push-button
switch will silence the audible alarm.
Study "Appendix A - ISA Sequence Charts" to determine what output and
control functions will best suit your needs. Set switch positions 1 through 6 on S4 to
obtain the desired ISA Sequence. Set switch positions 9 through 11 on S1, S2, and
S3 to configure each set of four inputs for any optional features desired (Non-First-Out
sequences only). Remember that the choices made on the Common Services Module
will also affect the outputs.
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AN-3196B-MOD Annunciator
SEQUENCE CONTROL MODULE
4.2
TECHNICAL DATA
The Sequence Control Module is built around three Motorola microprocessors
(Z1, Z2, and Z3). (Refer to "Appendix F - Engineering Drawings".) These are
Motorola Part Number MC68HC05C4P. Each microprocessor serves an identical
function for each of three groups of four inputs to the annunciator. The balance of this
discussion uses the first group (with Z1) as an example. However, the other two
groups are essentially identical. Refer to the schematic diagrams for the
corresponding component numbers in these other groups.
Z1 is an 8-bit CMOS device with 31 bi-directional Input/Output (I/O) ports in four
groups (PA0 through PA7, PB0 through PB7, PC0 through PC7, and PD0 through
PD5 and PD7), as well as several special-purpose ports. Z1 contains an embedded
program which assigns specific functions to each port and governs the responses at
the outputs to the combination of signals present at the inputs.
Z1 operates on +5 VDC and requires an average current of 2 milliamperes (2
mA) for internal processes. The +5 VDC is derived from 24V system power. (Refer to
Common Services Module Schematic and Assembly Drawing in "Appendix F Engineering Drawings" and to Section 5.2.)
Capacitor C1 absorbs electrical transients and is, by design, located close to
Z1. +5V is applied to pin Z1-40. The common connection (5V return) is pin Z1-20.
Z1 has an internal clock oscillator. The frequency of the oscillator is
determined by the value of resistor R1. This value is selected to generate a clock
frequency of 1.2 MHZ. This wave form, when viewed on an oscilloscope at pin Z1-38,
has a period of 0.833 microseconds.
4-5
Rochester Instrument Systems
Z1 has an internal reset function which enables it to automatically clear all
registers and begin processing in an orderly fashion when power is applied. The reset
signal at pin Z1-1 enables an external reset to be applied. The line over "RESET" on
the schematic means that this signal is low (0V) in the active state and high (+5V) in
the passive state. A common reset signal is directed to the Sequence Control Module
from the Common Services Module.
The Serial Data signal from the Common Services Module is connected to the
Interrupt Request (IRQ) input port Z1-2. Feedback Data is provided at port PB0 (Z112), used here as an output port. It is inverted by Z4 and "OR" gated with Feedback
Data from Z2 and Z3.
The input wiring is connected to rear terminals which are part of the TB1
connector. This (like TB2) is a terminal block on the outside of the unit, and a printed
circuit board edge connector on the inside. Thus it provides direct connection from
rear terminals TB1- 1-18 to SCM pins J4- 1-18 (refer to SCM Schematic & Assembly
Drawing in Appendix F).
TB1- 1-12 (J4- 1,2,4,5,7,8,10,11,13,14,16,17) are field contact inputs. TB1VA-VF (J4- 3,6,9,12,15,18) are either voltage supply or voltage return terminals, or are
unused. In the standard configuration of Field Contact Voltage (FCV) supplied to dry
field contacts, these terminals provide the FCV connections (one FCV terminal for
every two field contact pairs). In the Isolated/AC input version (input voltage sourced
from field) for one group, TB1- VF (J4-18) is used as the common return connection,
and TB1- VA-VE (J4-3,6,9,12,15) are unused. In the Isolated/AC input version for six
groups, TB1- VA-VF (J4-3,6,9,12,15,18) provide one return connection each for the
six groups of two inputs each.
The SCM is set up for any one of the above three configurations, according to
the installation or omission of four solder-in jumpers in each of six jumper arrays (one
for every two inputs). These are JPA1, JPB1, JPC1, and JPD1 for the first two inputs,
through JPA6, JPB6, JPC6, and JPD6 for the last two inputs.
In the following discussion of input processing circuitry, the components
associated with Input 1 are used as an example. For standard input configuration (dry
contacts), JPB1 and JPC1 are installed; JPA1 and JPD1 are omitted. FCV is brought
onto the SCM through ribbon cable connection J1-8. Capacitor C6, connected to
chassis ground, provides suppression of electrical transients which may be brought in
from the field wiring. FCV, from the SCM, is connected to FCV supply terminal TB1VA (J4-3) via JPC1. FCV Return is brought onto the SCM through J1-9, and routed to
the input circuitry through JPB1, providing the return path.
4-6
AN-3196B-MOD Annunciator
SEQUENCE CONTROL MODULE
For Isolated/AC input configuration (one group), JPA1 is installed, while the
other jumpers are omitted. This provides a return path to common return terminal
TB1- VF (J4-18), which is connected to the field voltage return side.
For Isolated/AC input configuration (six groups), JPD1 is installed, while the
other jumpers are omitted. This provides a return path to return terminal TB1- VA (J43), which is connected to the field voltage return side for the first two inputs.
The input voltage applied to TB1-1 (J4-1) produces a current through Resistors
R1A and R1B, Diode Bridge BR1, and Resistors R1C and R1D. Resistor R1E acts as
a shunt to prevent any spurious potential voltage from building up and triggering an
alarm while the true input voltage is absent. With Resistors R1A, R1B, R1C, and R1D
in place, the correct level of current will be generated from an input voltage of 24V.
Removing R1D sets up the circuit for 48V, while removing both R1D and R1A sets up
the circuit for 125V.
Diode Bridge BR1 rectifies the current, so that the circuit may be activated by
AC, as well as DC of either polarity. The current then passes through Resistor R1F,
and through the Light Emitting Diode (LED) input of Optical Coupler OC1. OC1
provides electrical isolation between the input circuitry and the logic circuitry. It also
facilitates isolation between inputs in the six group configuration.
Current passing through this LED causes light to be emitted from it, which
activates the photo transistor output. This in turn switches +5V through R1H,
producing a high, or logic `1' level at input port PC0 of Z1. R1H in conjunction with
Capacitor C1A also provides an RC time constant of approximately 30 milliseconds.
This serves as a filter, suppressing transients which may be entering from the field
wiring. R1G serves as a pull-down resistor, to maintain a low, or logic `0' level at PC0
while OC1 is turned off. Ports PC1-PC3 similarly monitor the status of the other three
inputs.
Ports PB2 through PB7, PC6, PC7, PD0 through PD5, and PD7 are used as
inputs to monitor DIP switch status. The DIP switches select program sequences and
operating modes (refer to notes and tables on Schematic/Assembly drawing). When a
switch is open, the input is held high by a 100K pull-up resistor. When the switch is
closed, the input is forced low, to Common. Strobe signals STRB1 AND STRB2 from
PC4 and PC5, in conjunction with diodes CR1C-CR4C and CR1D-CR4D, multiplex
Data from eight DIP switches (S1-1 through S1-8) onto four input ports (PD0 through
PD3).
Ports PA0 through PA3, used as outputs, control FET's Q1A through Q4A,
which drive LED's LED1A through LED 4A respectively. Series resistors R1J through
R4J limit the +5V derived LED current to approximately 2 milliamperes.
4-7
Rochester Instrument Systems
4.3
SPECIAL APPLICATIONS
There are several special applications possible with the Sequence Control
Module. These require modification to the module itself. Such modifications should
only be performed by knowledgeable personnel following proper procedures for static
protection.
4.3.1 CONTACT SHARING
At times it is necessary to share an input contact for the annunciator with
another device such as an event recorder. Due to internal connections in the
Sequence Control Module, it is possible to have voltages from the module feed back
to the other device. To prevent such an occurrence, it is necessary to replace the
bridge rectifiers with blocking diodes.
After removing bridge rectifiers BR1-12, install blocking diodes CR1A through
CR12A and return jumpers JR1-12 as shown on SCHEMATIC & ASSEMBLY
DRAWING IN APPENDIX F. The diodes are type 1N4004.
4.3.2 ALARM RESPONSE TIME
The Sequence Control Modules are factory set with a contact alarm response
time of 30 milliseconds. This response time is factory set to prevent false alarms due
to transient electrical signals. Response time can be increased or decreased for
certain situations, if necessary. Before doing this, however, you should consider the
possible consequences of false alarms.
In addition, it is possible to select optional response times of up to 30 seconds.
Either type of change (faster or slower) to the response time requires a modification to
the Sequence Control Module. Refer to the tables on the Schematic & Assembly
Drawing in "Appendix F - Engineering Drawings" for specific part numbers and part
values and for diode polarities for each of the possible options.
For a response time of from 70 milliseconds to 700 milliseconds, change
capacitors C1A through C12A to the appropriate valued capacitor. For a response
time greater than 1 second, change capacitors C1A through C12A to the appropriate
valued capacitor, change resistors R1H through R12H to 200K ohm resistors, and
install diodes CR1B through CR12B on the Sequence Control Module. (See
SCHEMATIC & ASSEMBLY DRAWING IN APPENDIX F for location, type, and
orientation of each component.)
4-8
AN-3196B-MOD Annunciator
SEQUENCE CONTROL MODULE
Response time for incoming alarms from the MODBUS interface port will vary
depending on the baud rate and polling (query) interval.
4.3.3 HOST SYSTEM INPUTS
The inputs to the AN-3196B-MOD Annunciator can be driven from a host
system instead of from field contacts. To drive the inputs from open-collector
transistor outputs on the host system, remove JPB1-6 and JPC1-6, and install JPA1-6.
Connect +24V from TB2 to VF(RET) on TB1. Refer to SCHEMATIC & ASSEMBLY
DRAWING in "Appendix F - Engineering Drawings" for specific part locations.
To drive the inputs from 5V logic level outputs (CMOS or TTL) on the host
system, remove R(1-12)A, R(1-12)B, and
C(1-12)A. Add a wire jumper from the J4(1-12) side feedthru pad of R(1-12)A to the
unused feed thru pad connected to OC(1-12)-4. Refer to SCHEMATIC & ASSEMBLY
DRAWING in "Appendix F - Engineering Drawings" for specific part locations.
4-9
Rochester Instrument Systems
AN-3196B-MOD Annunciator
COMMON SERVICES MODULE
SECTION 5 - COMMON SERVICES MODULE
W A R N I N G
STATIC ELECTRICITY IS ALWAYS PRESENT ON YOUR
BODY AND CLOTHING. THEREFORE, YOU MUST
EXERCISE CARE WHEN HANDLING STATIC SENSITIVE
ELECTRONIC ASSEMBLIES AND DEVICES. IMPROPER
HANDLING CAN CAUSE AN EXCESSIVE ELECTROSTATIC
DISCHARGE (ESD) WHICH CAN DAMAGE OR DESTROY
INTEGRATED CIRCUITS, SEMICONDUCTORS, OR OTHER
STATIC SENSITIVE DEVICES. FOR FURTHER DETAILS
AND DISCUSSION ON ESD AND APPROPRIATE HANDLING
TECHNIQUES, SEE THE APPENDIX ON ESD.
The Common Services Module (CSM) receives information from the Sequence
Control Module, the system push-button switches, and the MODBUS serial interface
port. In response, signals are sent back to the Sequence Control Module and to
various output devices.
When one of the inputs goes into alarm, the Sequence Control Module sends
information to the Common Services Module along the Feedback wire of the System
Bus. The microcomputer on the Common Services Module receives this data and
generates the appropriate control signals to activate the selected options. The LED
will flash in synchronization with the selected flash rate (1 or 2) on the Serial Data Bus.
If the point on alarm is the first point in a First-Out group, the Common Services
Module will send a First-Out blocking bit back to the Sequence Control Module along
the Serial Data wire of the System Bus.
At the same time, the Common Services Module sends information to the
appropriate output relay. The type of alarm (or possibly no audible alarm) is
determined by the options chosen on the Common Services Module as well as by the
sequence information received from the Sequence Control Module.
5-1
Rochester Instrument Systems
5.1
OPTIONS
There are seven switch-selectable options for the Common Services Module.
An 8-switch, Dual In-line Package (DIP) switch assembly (S1) on the Common
Services Module controls the options. Refer to SCHEMATIC & ASSEMBLY
DRAWING in "Appendix X" for the location of switch assembly S1.
The model number of the Common Services Module is AN-3187. This model
number can have various suffixes which indicate selected options. The option
selections and the corresponding suffixes are shown in the table below. The standard
configuration -- no suffixes --is switch positions 1 to 7 "OFF". Switch position 8 is not
used. The suffix is used when a switch is chosen to be in the non-standard ("ON")
setting.
Table 5-1 COMMON SERVICES MODULE OPTIONS DIP SWITCH 1
SWITCH
ON
OFF
SUFFIX
1
FLASH 1 SLOW
FLASH 1 FAST
F1
2
FLASH 2 FAST
FLASH 2 SLOW
F2
3
AUDIBLE ALARM SILENCED
AUTOMATICALLY AFTER 30 SEC.
NO AUTOMATIC SILENCE
AS
4
PUSH BUTTON INTERLOCK
NO PUSH BUTTON
INTERLOCK
INT
5
AUDIBLE ALARM PULSED
AUDIBLE ALARM
CONTINUOUS
PA
6
RINGBACK AUDIBLE ALARM PULSED
RINGBACK AUDIBLE
ALARM CONTINUOUS
PR
7
RINGBACK AUDIBLE OUTPUT USED AS
COMMON CONTACT OUT
RINGBACK AUDIBLE
ALARM NORMAL
CC
8
SPARE
We recommend that you keep a record of changes to the selections on the
Common Services Module. This will assist you if it becomes necessary to replace the
module.
The options available from the switch positions on S1 provide flexibility to allow
the user to customize and change the system to meet changing needs. Any changes
to these switch positions affect all of the inputs. You must also consider the ISA
Sequences chosen for the Annunciator when making changes to these switches.
5-2
AN-3196B-MOD Annunciator
COMMON SERVICES MODULE
5.1.1 FLASH RATE
When an input goes into an alarm state, the LED associated with that input
comes on as a flashing indicator. The rate of flash is determined by the selected ISA
Sequence and the setting of switch positions 1 and 2 on S1 on the Common Services
Module. Most ISA Sequences look at the position of switch position 1 when the
sequence refers to fast flash and at the position of switch position 2 when the
sequence refers to slow flash. (The exception to this is Sequence F3A which does
just the opposite.)
By changing the positions of switch positions 1 and 2 on S1, you can reverse
the normal flash rates as shown in the ISA Sequence Charts or you can have both
flash rates the same. (For Non-First-Out Sequences, the lamps can be made to come
on steady instead of flashing. Refer to "Section 4 - Sequence Control Module".)
5.1.2 AUDIBLE AND RINGBACK ALARM CONTROL
Switch position 3 on S1 controls the Automatic Alarm Silencing option. The
Annunciator can be set to automatically silence the audible alarms after approximately
30 seconds or it can be set to remain sounding until the Reset or Acknowledge pushbutton switch is pressed. This switch affects both the Audible Alarm and the Ringback
Alarm.
Either the Audible Alarm or the Ringback Alarm can be pulsed instead of being
a steady signal. This is especially useful when the same audible device is being used
for both alarms and you wish to be able to differentiate the two types of alarms. In
that case, one of the two can be pulsed and the other left steady. Switch positions 5
and 6 on S1 determine whether the alarms will be pulsed or steady. (For NonFirst-Out Sequences, the alarms can be caused to not sound at all. Refer to "Section
4 - Sequence Control Module".)
5.1.3 PUSH-BUTTON SWITCH INTERLOCK
Switch position 4 on S1 allows the option of preventing the Annunciator from
recognizing the Acknowledge push-button switch input unless it is preceded by
actuation of the Silence push-button switch. When switch position 4 is "ON", the only
allowable sequence of push-button switches is Silence, Acknowledge, and Reset (if
used). A new alarm will re-initialize the push-button switch sequence.
5.1.4 OPTIONAL RELAY CONTACT USE
5-3
Rochester Instrument Systems
Switch position 7 on S1 allows you to use the Non-critical/ Ringback Audible
output as a Common Contact Follower instead. In this mode, the relay (K2) will be
activated whenever any point is in the alarm mode, regardless of sequence status.
Jumper JPC is removed and jumper JPD is installed. Since the Ringback port is used
for this function, the Ringback function is not simultaneously available.
5-4
AN-3196B-MOD Annunciator
COMMON SERVICES MODULE
5.2
POWER SUPPLY CONNECTIONS
The Common Services Module has turret-type solder terminals, E1 through
E11, which are used to make power connections. (Refer to SCHEMATIC &
ASSEMBLY DRAWING in "Appendix F -Engineering Drawings".
Earth ground is connected to the ground stud on the rear of the enclosure.
From there it is factory jumpered to Terminal Block TB2, and connected internally to
E9. From E9, it may be wired to transformer shield connections on AC power options.
Prime supply power is connected to TB2-16 (L for AC, + for DC) and TB2-17 (N
for AC, - for DC). TB2-16 is connected internally to E3 through fuse F2. TB2-17 is
connected internally to E4. If prime supply power is 24 V, E3 and E4 may be wired
directly to E6 and E5 for operating power, and to E1 and E2 for Field Contact Voltage.
The 24 V operating power is rectified by diode bridge CR7 through CR10 and
protected by fuse F1. This supply then branches off through CR5 and CR6. After
CR5, it is filtered by C19. It then provides internal 24 VDC power to the relays and to
the 5V regulator Z2. Z2 supplies +5V logic power which is filtered by C23. After CR6,
the supply is filtered by C21 and C22 and provides 24 VDC output to power the
push-button switches and audible devices.
The Field Contact Voltage input from E1 and E2 is rectified by diode bridge
CR11 through CR14 and protected by fuse F3. This supply is then filtered by C24 and
provides excitation voltage to the field contacts being monitored. R16 bleeds the
charge off of C24 when power is removed. It also prevents C24 from charging up to
too high a value from voltage spikes.
If prime power is other than 24 V, an interposing power supply or transformer
device is required to generate 24 V for system power and optional 24 VDC Field
Contact Voltage, and to generate 125 VDC for optional 125 VDC Field Contact
Voltage. Device input is connected to E3 and E4. Typical connections are shown in
"SCHEMATIC & ASSEMBLY DRAWING IN APPENDIX F )
For AC prime supply power, two transformers are wired together. The
individual primaries are wired in parallel for 120 VAC and in series for 240 VAC. With
240 VAC prime power, the primary series connections are made to E7 and E8. For 48
or 125 VDC prime power, a model AN-3195B invertor-type power supply is used.
Output connections from the optional transformers or power supplies are made
to E6 and E5 (24 V) and to E10 and E11 (48/125 V). For 24 VDC Field Contact
Voltage, E1 and E2 are wired to E6 and E5. For 48/125 VDC Field Contact Voltage,
E1 and E2 are wired to E10 and E11.
5-5
Rochester Instrument Systems
5.3
TECHNICAL DATA
The heart of the Common Services Module is a Motorola microprocessor, Z1.
This is Motorola part number MC68HC05C4P. It is an 8-bit CMOS device with 31
bi-directional Input/Output (I/O) ports in four groups (PA0 through PA7, PB0 through
PB7, PC0 through PC7, and PD0 through PD5, and PD7) plus several special
purpose ports. Z1 contains an embedded program which assigns specific functions to
each port. It governs each output response to the combination of signals present at
all of the inputs.
Z1 runs on +5V and requires an average current of 2 milliamperes (Ma). The
+5V is regulated by Z2 from system 24V. Capacitor C23 acts as a filter. It absorbs
surges, noise spikes and other types of interference which would otherwise cause
voltage transients on the 5V supply. Capacitor C10 provides additional noise
suppression in the vicinity of the microcomputer. +5V (VDD) is applied to Z1-40. The
Common (5V return) connection is to Z1-20.
Z1 uses a crystal-controlled clock circuit. Its frequency is determined by the
value of crystal Y1. This value is selected to generate a clock frequency of 1.000
Megahertz (MHz). This wave form, monitored at Z1-38 and viewed on an
oscilloscope, would have a period of 1.000 microseconds.
Z1 has an internal Reset function which enables it to automatically clear all
registers and begin processing in an orderly fashion when power is applied. The
Reset signal at Z1-1 enables a manual external reset to be applied. The line over
"RESET" on the schematic means that this signal is low (0V) in the active state and
high (+5V) in the inactive state. The circuitry connected to this pin is designed to force
a Reset condition if the 24V supply falls below an acceptable level.
Feedback Data signal (from the Sequence Control Module) is connected to the
Interrupt Request (IRQ) input port at Z1-2. A Pull-up resistor holds this line high (+5V)
when it is not being forced low externally. The push-button switch wiring is connected
to J1-1 through J1-3, and J1-5.
Functional outputs of the Common Services Module include the relay control
outputs provided at Ports PC1 through PC5 and the Serial Data output (PC0). The
relay control outputs are, respectively, Critical Audible, Non-Critical (Alarm) Audible,
Ringback Audible, Alarm Reflash, and Critical Reflash.
5.4
OUTPUT RELAYS
The Common Services Module controls various output relays. The Annunciator
System can have one or two audible alarms of three available types: Critical, Non5-6
AN-3196B-MOD Annunciator
COMMON SERVICES MODULE
Critical, and Ringback. Each of the audible alarms can have a different device so that
the type of alarm can be determined by the sound.
The standard module uses relay K1 for the Critical Audible Alarm and relay K2
for the Non-Critical Audible Alarm. To use the first relay for the Non-Critical Audible
Alarm, remove jumper JPA and install jumper JPB. To use the second relay for the
Ringback Alarm, remove jumper JPC and install jumper JPD. NOTE: IF JUMPER
JPB IS INSTALLED, JUMPER JPC MUST BE REMOVED. The second relay can
also be used as a Common Contact Follower (refer to Section 5.1.4).
The system can also have up to two Reflash Relays for driving remote
Annunciators. Relay K3 is used for Non-Critical Reflash and relay K4 is used for
Critical Reflash.
In place of either of the Reflash circuits, the system could be set up with a
Power Monitor output. This circuit would indicate if there is a loss of logic power.
Remove both jumpers JPI and JPJ to use relay K3 as the power monitor. Remove
both jumpers JPK and JPL to use relay K4 as the power monitor. (Refer to Appendix
F, D-1080-575, sheet 4 of 4, for the location of these jumpers and resistors.)
5-7
Rochester Instrument Systems
5.5
CONFIGURATION CHANGES
The standard module configuration is to have the contacts for all relays
normally open. To change the configuration of relay outputs K1 and K2 from normally
open to normally closed, it is necessary to change some of the jumpers on the
Common Services Module. These changes are also affected by whether the module
has normally energized or normally de-energized relays. (Refer to "SCHEMATIC &
ASSEMBLY DRAWING IN APPENDIX F" for the location of these jumpers.)
The standard factory configuration is to have all relays normally de-energized.
To have normally energized relays, it is necessary to install transistors Q9 through
Q12 for relays K1 through K4 respectively, and to change jumpers on the Common
Services Module. Refer to the SCHEMATIC & ASSEMBLY DRAWING in "Appendix
F - Engineering Drawings" for part locations. TABLE 5.2 shows which jumpers
should be in place (IN) on the module and which jumpers should be removed (OUT)
for each of the possible choices.
TABLE 5.2 COMMON SERVICES MODULE RELAY JUMPERS
Contact Condition
Relay
DeEnergized
energized
K1
K2
K3
K4
Input Jumper and
Transistor
Configuration
Output Jumper
Configuration
In
Jumper
Out
Jumper In
Jumper
Out
NO
NC
JPF & Q9
JPE
JPN
JPM
NC
NO
JPF & Q9
JPE
JPM
JPN
NO
NC
JPH &Q10
JPG
JPP
JPO
NC
NO
JPH &Q10
JPG
JPO
JPP
NO
NC
JPJ & Q11
JPI
Selected on TB2
NC
NO
JPJ &Q11
JPI
Selected on TB2
NO
NC
JPL &Q12
JPK
Selected on TB2
NC
NO
JPL &Q12
JPK
Selected on TB2
5-8
AN-3196B-MOD Annunciator
MAINTENANCE
SECTION 6 - MAINTENANCE
W A R N I N G
STATIC ELECTRICITY IS ALWAYS PRESENT ON YOUR
BODY AND CLOTHING. THEREFORE, YOU MUST
EXERCISE CARE WHEN HANDLING STATIC SENSITIVE
ELECTRONIC ASSEMBLIES AND DEVICES. IMPROPER
HANDLING CAN CAUSE AN EXCESSIVE ELECTROSTATIC
DISCHARGE (ESD) WHICH CAN DAMAGE OR DESTROY
INTEGRATED CIRCUITS, SEMICONDUCTORS, OR OTHER
STATIC SENSITIVE DEVICES. FOR FURTHER DETAILS
AND DISCUSSION ON ESD AND APPROPRIATE HANDLING
TECHNIQUES, SEE THE APPENDIX ON ESD.
The Annunciator should be tested at least once a month following the Test
Procedures in the "Section 3 - Controls & Operation". Identify any problems which
occur. Many problems can be associated with one of the modules and can usually be
resolved by replacing the module.
It is common to begin suspecting component failures or problems with a
module whenever there is a problem with an annunciator. However, annunciator
problems are frequently the result of other, simpler conditions.
Check all screw terminals on Terminal Blocks TB1 and TB2 to make sure that
all wires are in place and that all connections are tight. Make sure that the prime
power source is working correctly and that the supply voltage is reaching the terminal
blocks. Make sure that all wires to the field contacts have continuity (are not broken or
short circuited).
Check all terminal connections every six months. If there is any amount of
vibration in the vicinity of the annunciator, they should be checked more frequently.
6-1
Rochester Instrument Systems
To remove both the Sequence Control Module and the Common Services
Module, release the captive thumbscrew at the bottom of the front panel. If your unit
has the Modbus Serial Data Option, disconnect the 9-pin data cable on the rear of the
annunciator. Alternately pull at the top and bottom of the bezel to loosen the assembly
from the rear edge-grip connectors and slide the entire assembly forward. To replace
the modules, make sure the Sequence Control Module (left side as viewed facing the
enclosure) is aligned with the slides in the enclosure. Slide the unit straight into the
enclosure. Both cards must line up with their respective edge connectors. Press the
modules firmly into the edge connectors and tighten the screw. Replace the Modbus
connector on the rear, if equipped.
CAUTION
The AN-3196B-MOD plug-in assembly is NOT
interchangeable with the earlier model AN-3196
plug-in module assemblies. Therefore, do not
attempt to service or repair any AN-3196 type
installation by exchanging plug in module
assemblies unless the model number suffixes
match each other and match the suffix on the
housing serial number tag. Even if the suffixes
match extra caution must be used to verify that
the assemblies are identical in the areas of
prime power, FCV and dip-switch settings.
6-2
AN-3196B-MOD Annunciator
MAINTENANCE
6.1
TROUBLE SHOOTING
The following chart lists some specific problems which may be encountered
along with the probable solution.
SYMPTOM
PROBABLE SOLUTION
LED's turn on when input is on alarm, but
no flash and no audible alarm.
There is no serial data to the Sequence
Control Module. The Common Services
Module may not be properly seated in the
cell or may be malfunctioning or the
ribbon cable may not be properly
connected.
LED's flash properly, but no audible alarm
or Reflash output on Test or Alarm.
The Common Services Module is not
responding to Feedback Data. Replace
the Common Services Module.
Audible alarm works on test, but not on
real alarm. Critical audible alarm and
Reflash outputs may be continuously
activated.
The Sequence Control Module is holding
the Feedback Bus in abnormal state.
Replace the Sequence Control Module.
One or more push-button switches do not
operate properly.
Verify that the push-button switches are
normally open by measuring +24 VDC
across the push-button switch input
terminals. If the push-button switch is
open, use a clip lead to simulate a pushbutton switch at the annunciator pushbutton switch terminal to determine if the
problem is in the Common Services
Module or in the push-button switch or
push-button switch wiring.
NOTE: MANY START-UP PROBLEMS
CAN BE TRACED TO IMPROPER
WIRING OF FIELD MOUNTED PUSHBUTTON
SWITCHES.
DOUBLE
CHECK ALL CONNECTIONS.
6-3
Rochester Instrument Systems
Test operates properly, but no field inputs
operate.
Field Contact Voltage is not getting to the
field contacts.
Check Field Contact
Voltage power and distribution wiring.
No MODBUS communications
Verify the basic Annunciator functions are
still working (i.e.: Press Test button and
observe lights and horn).
Check
MODBUS serial cable connections,
communications board DIP switch
settings (baud rate, Master/Slave)
Nothing works.
Check all power supply voltages. Check
power distribution wiring.
6-4
AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
SECTION 7 - SERIAL COMMUNICATIONS INTERFACE
The AN-3196B-MOD Serial Communications Interface provides the AN3196B-MOD LED Annunciator with the ability to communicate over a Modicon
Modbus™ serial port. The Communications Interface provides the ability either to
actuate or monitor the twelve annunciator points. The annunciator points are
hardwired and user configurable via DIP switches. The AN-3196B-MOD Serial
Communications Interface may act as either a master or a slave in the ModbusTM
environment.
7.1
MODBUS INTERFACE OVERVIEW
ModbusTM is a communications protocol by Modicon, Inc., developed primarily
for control applications. The protocol provides the internal standard that Modbuscompatible devices use for passing messages. During Modbus communications, the
protocol first determines a device’s address, and then recognizes a message. The
protocol then determines the kind of action to be taken, and extracts any data or other
information contained in the message.
The Modbus protocol employs a “query-response” style of communication.
Queries are sent by a single master unit, which initiates all communications on a given
network. The response is returned by the appropriate slave unit, of which there can be
several. Slave units are distinguished from each other by unique device addresses,
which can be configured by the user. The master unit tells the slave unit what to do by
sending it a function code. The Modbus protocol has twenty-four functions, but many
applications only support a smaller subset of these.
Modbus also supports two styles of communication: ASCII and RTU. When
devices are set up to communicate on a MODBUS network using ASCII mode, each
8-bit byte in a message is sent as two ASCII characters. The main advantage of this
mode is that it allows time intervals of up to one second to occur between characters
without causing an error. When the RTU mode is used, each 8-bit byte contains two
4-bit hexadecimal characters. This method’s higher character density allows a better
data throughput than ASCII for the same baud rate. However, each message must be
transmitted in a continuous stream.
The ROCHESTER AN-3196B-MOD Serial Communications Interface
implements the Modbus protocol by employing just five of the twenty-four function
codes. The function codes primarily read data from or write data to holding registers,
which are general purpose 16-bit data storage locations in Modbus-compatible
devices. The twelve alarm points are packed into a single holding register, one bit per
alarm. An alarm point-to-register location map is illustrated later in this chapter. An
alarm condition is indicated when there is a “1" in a bit location, normal condition when
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there is a “0". Holding register bits can be selected to either be monitor or actuate
points. This is detailed in Section 7.3 “Configuration”.
The AN-3196B-MOD can be selected to operate as either a Modbus master or
slave. When the AN-3196B-MOD is selected to operate as a master, it can initiate
communications with a single slave device. The AN-3196B-MOD will query the slave
every 0.5 seconds to read its holding register contents. If the master detects a change
in one of its own holding register bits, it will write the information to the slave. When
the AN-3196B-MOD is operating in master mode, it can address only one slave.
Therefore, the master mode is limited to single point-to-single point communication.
When the AN-3196B-MOD is selected to operate as a slave, it will respond to
communications initiated by a network master. A network master can read from or
write to the AN-3196B-MOD's holding registers. Additionally, the AN-3196B-MOD will
respond with an exception code if it receives a query using an unsupported function
code. As a slave, the AN-3196B-MOD can be one of up to 255 slave nodes
responding to queries from a Modbus master. Multiple drops from an RS-232 line can
be obtained by using commercially available splitters.
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AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
7.2
USER CONNECTIONS AND INDICATORS
Diagrams of the back panel of the AN-3196B-MOD is shown below. The
backplane has two LED indicators for “Transmit” and “Receive.” The Transmit LED
illuminates when the AN-3196B-MOD is transmitting a message. The Receive LED
illuminates when the AN-3196B-MOD is receiving a message.
Figure 7-1 AN-3196B-MOD Backplane
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Rochester Instrument Systems
The back panel has one 9-pin RS-232 connector for the Modbus port.
Connections can be from the Modbus port to a Personal Computer using a Null
Modem cable as shown below:
TX: transmitted data
RX: received data
RTS: request to send
DSR: data set ready
DTR: data terminal ready
DCD: carrier detect
CTS: clear to send
NC: no connection
9 - Pin Male (PC)
9 - Pin Female
(AN-3196B-MOD)
DCD
1
1
Shield
RX
2
2
RX
TX
3
3
TX
DTR
4
4
NC
Ground
5
5
Ground
DSR
6
6
NC
RTS
7
7
RTS
CTS
8
8
CTS
9
NC
Figure 7-2 Connection Diagram for Serial Cable
This cable configuration will work for most applications. The AN-3196B-MOD supports
RTS-CTS control lines only. Refer to the instruction manual of the device you are
connecting to verify compatibility.
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AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
7.3
CONFIGURATION
The AN-3196B-MOD Serial Communications
Interface is configured with five eight-position
switches (S1 through S5) on the PC board. The
switches can be reached by removing the modules
from the housing. Refer to Section 6 for removal
instructions.
7.3.1 SETTING THE COMMUNICATIONS MODE
Switch S5 determines the communications configuration and selects the
master/slave mode. Positions on the switch are assigned as follows:
Bits 1,2,3:
Baud Rate Selection
Factory preset to 9600 baud.
Bits 4,5:
Parity Selection
Factory preset to "none"
Bit 6:
Master/Slave Mode
Factory preset is "Slave" mode.
Bit 7:
ASCII/RTU Communications Mode
Factory preset to "RTU" mode.
The following tables illustrate switch positions for various parameters. A “1" refers to
the ON (or UP) position.
Baud Rate
Bit 1
Bit 2
Bit 3
1200
1
1
1
2400
0
1
1
4800
1
0
1
9600
0
0
1
19200
1
1
0
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Rochester Instrument Systems
Parity
Bit 4
Bit 5
None
1
1
None
0
1
Odd
1
0
Even
0
0
Mode
Bit 6
Slave Mode
0
Master Mode
1
Mode
Bit 7
ASCII Mode
0
RTU Mode
1
The switch S5 settings for a unit configured for 9600 baud, no parity, slave
mode, and RTU communication would appear as follows:
Figure 7-4 SWITCH S5 SETTINGS
7.3.2 SETTING THE MODBUS ADDRESSES
Switch S1 determines the Modbus addresses between 1 and 255. When the
AN-3196B-MOD Serial Communications Interface is operated in the slave mode,
the switch determines the Interface’s Modbus address. When the AN-3196B-MOD
Serial Communications Interface is operated in the master mode, the switch
determines the Modbus address to which the interface will communicate. The setting
of this switch is the binary equivalent of the decimal address.
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AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
For example, to set the AN-3196B-MOD Modbus address to 100:
10010 = 011001002
The switch S1 settings would be:
Switch S1
1
2
3
4
5
6
7
8
0
0
1
0
0
1
1
0
Position
Setting
Note: Binary values in the above table are read from right to left (Switch S1-1 is the
Least Significant Digit).
Note: Unless specified by the user, the Modbus address is factory preset to "1".
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7.3.3 SETTING THE HOLDING REGISTER
Switch S4 determines the holding register addresses between 1 and 255.
Alarm point data, reset, and acknowledge signals are combined into five contiguous
16-bit holding registers. According to the Modbus standard, this switch setting is a
pointer to the next register address. The address is set by setting the switches to the
binary equivalent of the decimal register address pointer.
For example, to specify the holding register 40100, the system assumes the
Modbus standard of 40xxx for a holding register address. Therefore, it is only
necessary to specify the pointer value of 99.
9910 = 011000112
The switch S4 setting would be:
Switch S4
Position
1
2
3
4
5
6
7
8
Setting
1
1
0
0
0
1
1
0
In compliance with the ModBus standard, switch S4 specifies the location of the
first register. A register map is given below. The map corresponds to the connection
points on the back of the interface. The user will be supplied with an alarm point to
register maps for your specific configuration. The map assumes that the register
address pointer has been set to 99.
Bit Location
Register Address
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
40100
--
--
--
--
AP
12
AP
11
AP
10
AP
09
AP
08
AP
07
AP
06
AP
05
AP
04
AP
03
AP
02
AP
01
40101
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
40102
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
40103
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
40104
--
--
--
--
--
--
--
--
--
--
--
--
Ack
Act
Rst
Act
Ack
Mtr
Rst
Mtr
Note: AP1 through AP12 are alarm points connected to the Sequence Control
Module. Rst Act and Ack Act are the RESET and ACKNOWLEDGE signals
received from the serial port. When the Ack Act bit is high, an Acknowledge will
be actuated within the Common Services Module. Similarly, if the RST Act bit is
high, a Reset will be actuated within the Common Services Module. Rst Mtr
and Ack Mtr are Reset and Acknowledge signals sent from the Common
Services Module to the serial port. When “Acknowledge” switch is depressed
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AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
on the Common Services Module, ACK Out is asserted high. When the Reset
switch on the Common Services Module is depressed, Rst Out is asserted
high. These signals are momentary. They will be held high for one Modbus
transaction or one second, whichever is longer. Because of this, provision
should be made for latching and capturing these signals within that time-period.
7.3.4 SETTING READ/WRITE POINTS
Switches S3 and S2 determine whether points are selected for monitor or
actuate modes. A monitor point can read alarm data from its annunciation point and
send it out through the Modbus Interface. An actuate point can take alarm information
received from the Modbus Interface and create a visual alarm at its annunciation point.
Each individual switch on DIP switches S3 and S2 controls an alarm point.
Points are configured as “monitor” when the DIP switch is in the ON or 1 position.
Points are configured as “actuate” when the DIP switch is in the OFF or 0 position. If
changing the direction of a given point is necessary, simply change the position of the
appropriate DIP switch.
Switch S3
Position
1
2
3
4
5
6
7
8
Alarm Point
1
2
3
4
5
6
7
8
Switch S2
Position
1
2
3
4
5
6
7
8
Alarm Point
9
10
11
12
-
-
-
-
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7.4
SLAVE MODE OPERATION
Slave mode operation is obtained by setting Bit 6 of Switch S5 to “1" (on). In
the slave mode, the interface will respond to queries from a master on the Modbus
network. The interface’s modbus address can be set using Switch S1. The holding
register location can be set using Switch S4. See the appropriate section for detailed
information.
7.5
MASTER MODE OPERATION
Master mode operation is obtained by setting Bit 6 of Switch S5 to “0" (off).
When in the master mode, the interface can initiate communications with one slave
device. The Modbus address of the slave to which the master will communicate can
be set using Switch S1. The holding register location of the slave to be asked can be
set using Switch S4. See the appropriate section for detailed information.
7.6
OVERVIEW OF AN-3196B-MOD MODBUS APPLICATION
7.6.1 ASCII MODE
Using ASCII mode to communicate on a Modbus network sends each 8-bit
message as two ASCII characters. The main advantage of this mode is that it allows
time intervals of up to one second to occur between characters without causing an
error.
The format for each byte in ASCII mode is:
Coding
System:
Hexadecimal, ASCII characters 0-9, A-F. One hexadecimal character
is contained in each ASCII character of the message. The
hexadecimal byte is split into most significant nibble, and least
significant nibble. The most significant is sent first, followed by the
least.
Bits per Byte:
1 start bit, 7 data bits, least significant bit is sent first, 1 bit for
even/odd parity; 1 stop bit. If no parity is used, two stop bits are sent.
Error Check
Field:
Longitudinal Redundancy Check (LRC)
7.6.2 ASCII MESSAGE FRAMING
In ASCII mode, messages start with a colon (:) character (ASCII 3A hex), and
end with a carriage return-line feed (CRLF) pair (ASCII 0d and 0a hex). The allowable
characters transmitted for all other fields are hexadecimal 0-9, A-F. Devices monitor
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AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
the network bus continuously for the colon character. When a colon is received, each
device decodes the next Address Field to determine if it is the addressed device.
Intervals of up to one second can elapse between characters within the
message. If a greater interval occurs, the receiving device assumes an error has
occurred.
A typical message frame is shown below.
Start
ASCII ":"
Address
Two ASCII characters
Function
Two ASCII characters
Data - Optional and not present n characters
in all functions.
Error Check
Two ASCII characters
End
ASCII CRLF
7.6.3 LONGITUDINAL REDUNDANCY CHECK (LCR) CHECKING
In ASCII mode, messages include an error-checking field. The LRC field
checks the contents of the message exclusive of the beginning colon and the ending
CRLF pair. It is applied regardless of any parity check method being used.
The LRC field is one byte, containing an 8-bit binary value. The LRC value is
calculated by the transmitting device that appends the LRC to the message. The
receiving device calculates an LRC during receipt of the message and compares the
calculated value with the actual value it received in the LRC field. If the two values are
not equal, an error results and the message is not processed.
The LRC is calculated by:
1.
Load an 8 bit lrc_register with all 0's.
2.
Place the first 8-bit message byte after the colon into a test_character.
3.
Add lrc_register with test_character, leave the result in lrc_register. This is an 8bit integer add with no carries.
4.
Repeat step 3 with each successive byte in the message before the lrc fields.
5.
Twos-complement the lrc_register to get the final LRC value.
The LRC value is converted into two ASCII values by the transmitting device,
then placed into the message with the most significant nibble in the first LRC position
and the least significant nibble in the last LRC position.
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7.6.4 RTU MODE
Using RTU (Remote Terminal Mode) to communicate on a Modbus network
sends each 8-bit message in two 4-bit hexadecimal characters. The main advantage
of this mode is that its greater character density allows a better data throughput than
ASCII for the same baud rate. Each message must be transmitted in a continuous
stream. The maximum time between characters must not exceed 1.5 character times
or the message may not be delivered/honored.
The format for each byte in RTU mode is:
Coding System
8-bit binary, hexadecimal 0-9, A-F. Two
hexadecimal characters contained in each 8-bit
field of the message.
Bits per Byte
1 start bit, 8 data bits, least significant bit first, 1 bit
for even/odd parity, 1 stop bit. If parity is not used,
2 stop bits are sent.
Error Check Field
Cyclical Redundancy Check (CRC)
7.6.5 RTU MESSAGE FRAMING
In RTU mode, messages start with a silent interval of at least 3.5 character
times. The first field transmitted is the device address.
The allowable characters transmitted for all other fields are hexadecimal 0-9, AF. Devices monitor the network bus continuously during the silent period. When a
character is received, each device decodes the address field to find out if it is the
address device. The entire message frame must be transmitted continuously. If a
silent interval of more than 1.5 characters occurs before completion of the frame, the
receiving device flushes the incomplete message, then assumes that the next byte will
be the address field of a new message.
Similarly, if a new message begins earlier than 3.5 character items following a
previous message, the receiving device will consider it a continuation of the last
message. This will set an error, as the value in the final CRC field and will not be valid
for the combined messages.
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AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
A typical message frame is shown below:
Start
4 character times
Address
one hexadecimal byte
Function
one hexadecimal byte
Data (Optional and not present
in all functions)
n hexadecimal bytes
Error Check
two hexadecimal bytes
End
4 character times
7.6.6 CYCLICAL REDUNDANCY CHECK (CRC) CHECKING
In RTU mode, messages include an error-checking field. The CRC field checks
the contents of the entire message. Error-checking is applied regardless of any parity
check method being used.
The CRC field is two bytes, containing a 16-bit binary value. The CRC value is
calculated by the transmitting device that appends the CRC to the message. The
receiving device recalculates the CRC and compares it with the value in the message.
If the values are not the same, the receiver will not process the message and an error
results.
The CRC is calculated by:
1.
Load a 16 bit crc_register with all 1's.
2.
Take the first 8-bit character from the message and place it into test_character.
3.
Exclusive OR the test_character with the crc_register, leaving the result in the
crc_register.
4.
The crc_register is shifted one bit toward the least significant bit, the least
significant bit is saved into a carry_register, the most significant bit is zero filled.
5.
If the old least significant bit was zero, go to step 6, if it was one, the
crc_register is exclusive ORed with 0xa001.
6.
Repeat steps 4 and 5, seven times.
7.
Using each successive character in the message, repeat steps 3 through 6.
8.
The CRC is the value in the crc_register.
The CRC value is placed into the message in hexadecimal format with the most
significant byte going into the first CRC byte, and the least significant byte going into
the last CRC byte.
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Rochester Instrument Systems
7.7
MODBUS FUNCTION CODES SUPPORTED BY THE AN-3196B-MOD
SERIAL COMMUNICATIONS INTERFACE
The following Modbus function codes are supported by the AN-3196B-MOD
Serial Communications Interface.
7.7.1 03 READ HOLDING REGISTERS
The 03 Read Holding Registers reads the binary contents of the holding
registers in the slave. Broadcast is not supported.
The query message specifies the starting register and quantity of registers to
be read. Registers are addressed starting at zero: registers 1-16 are addressed as 015.
The following example is a request to read register 108-110 from slave device
17.
Field Name
RTU
ASCII
First Byte
ASCII
Second Byte
Slave Address
0x11
0x31
0x31
Function
0x03
0x30
0x33
Starting Address High
0x00
0x30
0x30
Starting Address Low
0x6B
0x36
0x42
Number of Points High
0x00
0x30
0x30
Number of Points Low
0x03
0x33
0x33
Error Check High Low
Error Check Low
The response message contains the following register data as two bytes per
register with the binary contents right justified within each byte. For each register the
first byte contains the high order bits and the second contains the low order bits.
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AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
The following is an example of a response to the query above.
Field Name
RTU
ASCII
First Byte
ASCII
Second Byte
Slave Address
0x11
0x31
0x31
Function
0x03
0x30
0x33
Byte Count
0x06
0x30
0x36
Data High - Register 108
0x02
0x30
0x32
Data Low - 108
0x2B
0x32
0x42
Data High - Register 109
0x00
0x30
0x30
Data Low - Register 109
0x00
0x30
0x30
Data High - Register 110
0x00
0x30
0x30
Data Low - Register 110
0x64
0x36
0x34
Error Check High
Error Check Low
The contents of register 108 shown as 022b hex or 555 decimal. The contents
of register 109 is 0 and register 110 is shown as 0064 hex or 100 decimal.
7.7.2 06 PRESET SINGLE REGISTER
The 06 Preset Single Register function presets a value into a single holding
register. When broadcast, the function presets the same register reference in all
attached slaves.
The query message specifies the register reference to be preset. Registers are
addressed starting at zero: register 1 is addressed as 0. The requested preset value
is specified in the query data field.
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Rochester Instrument Systems
The following is an example of a request to preset register 40002 to 00 03 hex
in slave device 17.
Field Name
RTU
ASCII First
Byte
ASCII
Second Byte
Slave Address
0x11
0x31
0x31
Function
0x06
0x30
0x36
Register Address High
0x00
0x30
0x30
Register Address Low
0x01
0x30
0x31
Preset Data High
0x00
0x30
0x30
Preset Data Low
0x03
0x30
0x33
Error Check High
Error Check Low
The normal response is an echo for the query, returned after the register contents
have been preset.
Field Name
RTU
ASCII
First Byte
ASCII
Second Byte
Slave Address
0x11
0x31
0x31
Function
0x06
0x30
0x36
Register Address High
0x00
0x30
0x30
Register Address Low
0x01
0x30
0x31
Preset Data High
0x00
0x30
0x30
Preset Data Low
0x03
0x30
0x33
Error Check HIGH
Error Check Low
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AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
7.7.3 07 READ EXCEPTION STATUS
The 07 Read Exception Status reads the contents of the exception status byte
in the slave device. This function is supported on slave units only and will not be
requested by any master ROCHESTER device. Broadcast is not supported.
This function is only a response to a master that is in control of the bus; the
response will be hard coded and will only report that the system is emulating a 384,
which means that the 8 bits would normally be user-programmable and not have any
meaning in this application.
The following is an example of a request to read the exception status in slave
device 17.
Field Name
RTU
ASCII
First Byte
ASCII
Second Byte
Slave Address
0x11
0x31
0x31
Function
0x07
0x30
0x37
Error Check High
Error Check Low
The normal response contains the status of the eight status bits. The bits are
packed into one data byte. Here is an example of a response to the query.
Field Name
RTU
ASCII
First Byte
ASCII
Second Byte
Slave Address
0x11
0x31
0x31
Function
0x07
0x30
0x37
Status Data
Error Check High
Error Check Low
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Rochester Instrument Systems
7.7.4 16 (10HEX) PRESET MULTIPLE REGISTERS
The 16 (10hex) Preset Multiple Registers function presets values into a
sequence of holding registers. Broadcast is not supported.
The query message specifies the registers to be preset. Register addressing is
zero based: the first register is called 0, then 1 etc. The requested preset values are
specified in the query data fields. Data is packaged as two hexadecimal bytes per
register.
The following is an example of a request to preset two registers starting at 2 to
000a hex and 0102 hex in slave device 17.
Field Name
RTU
ASCII
First Byte
ASCII
Second Byte
Slave Address
0x11
0x31
0x31
Function
0x10
0x31
0x30
Starting Address High
0x00
0x30
0x30
Starting Address Low
0x01
0x30
0x31
Number of Registers High
0x00
0x30
0x30
Number of Registers Low
0x02
0x30
0x32
Byte Count
0x04
0x30
0x34
Data High Register 1
0x00
0x30
0x30
Data Low Register 1
0X0a
0X30
0X41
Data High Register 2
0x01
0x30
0x31
Data Low Register 2
0x02
0x30
0x32
Error Check High
Error Check Low
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AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
The normal response returns the slave address, function code, starting address
and quantity of registers preset.
Field Name
RTU
ASCII
First Byte
ASCII
Second Byte
Slave Address
0x11
0x31
0x31
Function
0x10
0x31
0x30
Starting Address High
0x00
0x30
0x30
Starting Address Low
0x01
0x30
0x31
Number of Registers High
0x00
0x30
0x30
Number of Registers Low
0x02
0x30
0x32
Byte Count
0x04
0x30
0x34
Data High Register 1
0x00
0x30
0x30
Data Low Register 1
0X0a
0X30
0X41
Data High Register 2
0x01
0x30
0x31
Data Low Register 2
0x02
0x30
0x32
Error Check High
Error Check Low
7.7.5 17 (11 HEX) REPORT SLAVE ID
Returns a description of the type of controller present at the slave address. The
ROCHESTER devices will emulate and return the code to indicate that a 384-type
controller is present. The additional bytes in the message will not be returned.
The following is an example of a request to report the ID and status of slave
device 17.
Field Name
ASCII Second
Byte
RTU
ASCII First
Byte
Slave Address
0x11
0x31
0x31
Function
0x11
0x31
0x31
Error Check High
Error Check Low
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Rochester Instrument Systems
The following is an example of ROCHESTER device number 17 responding to this
query.
RTU
ASCII First
Byte
ASCII Second
Byte
Slave Address
0x11
0x31
0x31
Function
0x11
0x31
0x31
Byte Count
0x04*
0x30
0x34
Slave ID
0x02*
0x30
0x32
Run Indicator
0xff*
0x46
0x46
Status Word High
0x00*
0x30
0x30
Status Word Low
0x04*
0x30
0x34
Field Name
Error Check High
*
Error Check Low
Hard coded response will always be returned.
7.7.6 EXCEPTION RESPONSE
When a slave receives a message, it will normally respond with the appropriate
message response.
The exceptions to this rule are:
1.
The slave device does not receive the query due to a communications error.
2.
The slave device receives the query, but detects a communications error
(parity, LCR or CRC).
3.
The slave device receives a query, and detects a communication error but
cannot handle the request.
In cases one and two the slave will not respond to the query and the master will
timeout and try to send the message again. In case number three, the slave will
respond with an exception response. An exception response consists of the slave
address followed by the function code set. This is the indicator to the master that the
message caused an “exception fault”. The next byte in the same message is the
exception code. This is the reason that the slave is not performing the function.
7-20
AN-3196B-MOD Annunciator
SERIAL COMMUNICATIONS INTERFACE
The following is an example of a query with an exception response.
Field Name
RTU
ASCII
First Byte
ASCII
Second Byte
Slave Address
0x11
0x31
0x31
Function
0x10
0x31
0x30
Starting Address High
0x00
0x30
0x30
Starting Address Low
0x01
0x30
0x31
Number of Registers High
0x00
0x30
0x30
Number of Registers Low
0x02
0x30
0x32
Byte Count
0x04
0x30
0x34
Data High Register 1
0x00
0x30
0x30
Data Low Register 1
0X0a
0X30
0X41
Data High Register 2
0x01
0x30
0x31
Data Low Register 2
0x02
0x30
0x32
Error Check High
Error Check Low
The query above is meant to preset multiple registers to a value. If the local
ROCHESTER device was a slave and was programmed to be using registers 100108, the above preset would not fall within the area of registers that the slave was
meant to use.
The following response would be sent.
Field Name
RTU
ASCII
First Byte
ASCII
Second Byte
Slave Address
0x11
0x31
0x31
Function
0x10
0x31
0x30
Exception Code
0x02
0x30
0x32
Error Check High
Error Check Low
7-21
Rochester Instrument Systems
This would indicate to the master that the address requested was not acceptable to
the slave.
Cod
e
Name
Meaning
01
Illegal Function
The function received in the query is not an allowed or
supported function.
02
Illegal data address
The address value exceeds that supported by this
device.
7-22
APPENDIX A
ISA SEQUENCE CHARTS
ISA SEQUENCE CHARTS
The Annunciator Sequence Designations and associated diagrams in this appendix
are published in ISA Standard S18:1 “Annunciator Sequence and Specification”. They
are presented here to aid in defining the operational characteristics of particular
annunciator sequences.
Each of these charts presents a particular sequence as designated by the associated
sequence letter. The charts show the conditions of four process elements: Process,
State, Visual and Audible.
PROCESS: The Process (P), or status of field contacts, may be either Abnormal or
Normal.
STATE:
The State (S) of annunciation may be Normal Alarm, First Alarm or a
group Subsequent Alarm of the group First Silenced, Silenced,
Acknowledged or Ringback.
VISUAL:
The Visual (V) aspects of the annunciation may be On, Off, Flashing,
Slow Flashing, Fast Flashing, or Intermittent Fast Flashing.
AUDIBLE:
The status of the Audible (A) condition may be Audible (on) or Silent
(off). There are also additional Audible conditions defined for Alarm
Audible (AA) and Ringback Audible (RA).
In the Annunciator Sequence Charts, there is a block for each possible annunciator
state. The annunciator may change from one State to another if the Event indicated by
the arrow occurs. The events are either a Process change or operator action on a
push button such as Silence, Acknowledge or Reset.
P
S
V
A
P ro c ess
Sequence
Visu al
A u d ib le
LEGEND
LAM P OFF
LAM P
F L A S H IN G
LAM P ON
HORN OFF
HORN ON
Rochester Instrument Systems
Option
Function
Description
1
Silence Pushbutton
A separate pushbutton to allow silencing the
audible device without affecting visual
displays.
2
Interlock Pushbutton
An interlock requiring operation of the
pushbuttons in sequence of SILENCE,
ACKNOWLEDGE, RESET.
4
No Lock-In
The lock-in feature is deleted. Momentary
alarms return to the normal sequence state
without operation of the ACKNOWLEDGE
pushbutton.
6
No Audible
The audible device is deleted.
7
Automatic Silence
A time delay device to silence the alarm
audible device after a set time of 30 seconds,
without affecting the visual displays.
8
Common Ringback
A common audible device to call attention to
both the alarm and ringback sequence
states.
10
No Ringback Audible
The ringback audible device is deleted.
11
Common Ringback
Visual
The same type flashing indication is used to
indicate both the alarm and ringback
sequence states.
12
Automatic Momentary
Ringback
Ringback sequence momentary alarms go to
the ringback state without operation of the
ACKNOWLEDGE pushbutton.
S eq u en ce " F 1A " F eatures:
A ck n o w led g e an d Test P ush b u tto n s
A larm au d ib le d ev ice
L o ck -in o f m o m en tary first alarm u n til
ack n o w led g ed. N o lo ck -in o f
m o m entary alarm s
F lash in g an d au d ib le in d icatio n s fo r
first alarm o n ly. N ew su b seq u en t
alarm s g o to the ack n o w led g ed state
F irst-O u t ind icatio n is reset an d th e
au dib le is silen ced w h en ack n o w led g ed
A u to m atic reset o f ack n o w ledg ed
alarm in d icatio n s after pro cess
co nd itio n s retu rn to n orm al
O p eratio n al test
IS A
REFERENCE
ALARM
D E V IC E
S equ ence "F 1A "
NORM AL
NORM AL
S
O FF
V
S IL E N T
A
R etu rn
to N o rm al
ABNORMAL
P
ACKN OW LEDG ED
S
ON
V
S IL E N T
A
A L E RT
NORMAL
P
IN IT IA L
F irst to
A b n o rm al
A ck n o w le d ge
W hile N o rm a l
(F irst-O u t R eset)
ACKN OW LEDG E
NEX T
IN IT IA L
A ck . W hile
N o rm al
(First-O u t R eset)
S u b seq u en t
to A b n o rm al
NEX T
RETURN TO NO RM AL
RETURN TO N ORM AL
BEFORE ACK.
IN IT IA L
IN IT IA L
NEXT
ABNO RM AL OR
NO RM AL
P
F IR S T A L A R M
S
F L A S H IN G
V
A U D IB L E
A
AC K N O W LE D G E
N EXT
IN IT IA L
NEX T
V IS U A L
F1A
A U D IB L E
S eq u en ce "F 3 A "
S eq u e n ce " F 3 A " F e a tu res:
A c k n o w le d g e, F irst-O u t R ese t, an d
Te st P u sh b u tto n s
A larm au d ib le d ev ic e
L o ck -in o f m o m e n ta ry a la rm s u n til
ac k n o w le d g ed
F irst-O u t flash in g is d iffe re n t fro m
su b seq u e n t flash in g
F irst-O u t R e set p u sh b u tto n to
ch a n g e th e F irst-O u t v isu al
in d ic atio n to b e th e sa m e as
su b seq u e n t v isu al in d ic atio n s
A u to m a tic rese t o f ac k n o w le d g ed
alarm in d ic atio n s w h en p ro ce ss
co n d itio n s re tu rn to n o rm al
O p e ra tio n a l test
IS A
REFEREN CE
ALARM
D E V IC E
NORMAL
R e tu rn
to N o rm a l
ABNORMAL
P
SU B SE Q U E N T
ACKN OW LED GED
S
A c k n o w le d g e
ON
V
W h ile
N o rm a l
S IL E N T
A
F ir s t-O u t R e s e t
W h ile A b n o rm a l
S
O FF
V
S IL E N T
A
A c k n o w le d g e S u b se q u e n t
to
W h ile
A b n o rm a l
N o rm a l
ABNORMAL OR
P
NORMAL
SU B SE Q U E N T
S
ALARM
S L O W F L A S H IN G *
V
A U D IB L E
A
ACKNO W LED GE
NEXT
IN IT IA L
IN T . FA S T
SLO W
FA S T
NEXT
ABNORMAL OR
NORMAL
F irst-O u t
R e se t
S IL E N T
A
A U D IB L E
A U D IB L E
A
* S lo w a n d fa st fla sh in g c a n b e
in te rc h a n g e d a n d c u sto m e r se le c te d b y
ju m p e r c h a n g e s o n th e c o m m o n m o d u le
RETURN TO NO RM AL
RETU RN TO NO RM AL
B E FO RE A C K .
IN IT IA L
IN IT IA L
N EXT
IN IT IA L
IN T. FA S T
SLO W
FA S T
FA S T
V
S
ACKN OW LEDGE
V IS U A L
F3A
S
IN T E R M IT T E N T
FA S T F L A S H IN G
A c k n o w le d g e
V
NEXT
P
F IR S T A L A R M
P
FA S T F L A S H IN G *
NO RM AL
IN IT IA L
F irst to A b n o rm a l
F ir s t-O u t R e s e t
W h ile N o rm a l
ABNORMAL OR
NORMAL
F IR S T
ACKN OW LED GED
A L E RT
P
NORMAL
N EX T
F IR S T -O U T
RESET
F irst-O u t S e q u e n c e "F 2 M -1 "
S eq u e n ce " F 2 M -1 " F ea tu res:
S ilen c e, A c k n o w le d g e, R e set, a n d Test
p u sh b u tto n s
A larm au d ib le d ev ic e
L o ck -in o f m o m e n ta ry a la rm s u n til
ac k n o w le d g ed
O p tio n 1 : S ilen c e p u sh b u tto n to silen c e
th e a u d ib le d e v ice w h ile re ta in in g
F irst-O u t flas h in g in d ic atio n
F la sh in g in d ic a tio n fo r first a larm o n ly.
N e w su b se q u en t a larm s h av e th e
sam e v isu a l in d ic atio n a s
ac k n o w le d g ed alarm s
F irst-O u t in d ica tio n is rese t w h en
ac k n o w le d g ed
M an u a l rese t o f ac k n o w le d g ed alarm
in d ic atio n s a fte r p ro ce ss c o n d itio n s
re tu rn to n o rm al
O p e ra tio n a l tes t
IS A
REFEREN CE
ALARM
D E V IC E
A L E RT
R eset
W h ile N o r m a l
ABNORMAL OR
NORMAL
P
ACKN OW LED GED
S
ON
V
S IL E N T
A
NORMAL
S
O FF
V
S IL E N T
A
S ubseq uent
to
A bnorm al
ABNORMAL OR
P
NORMAL
SU B SE Q U E N T
S
ALARM
S ile n c e
A c k n o w le d g e
ABNORMAL OR
NORMAL
P
F IR S T A L A R M
S
V
F L A S H IN G
V
A U D IB L E
A
A U D IB L E
A
A c k n o w le d g e (F irs t-O u t R e s e t)
ABNORMAL
A c k n o w le d g e
( F ir s t-O u t R e s e t)
ACKNO W LED GE
NEXT
F irs t to A b n o r m a l
ON
IN IT IA L
NEXT
P
F IR S T S I L E N C E D
S
F L A S H IN G
V
S IL E N T
A
RETURN TO NO RM AL
RETU RN TO NO RM AL
B E FO RE A C K .
IN IT I A L
IN IT I A L
NO RM AL
IN IT IA L
P
NORMAL
NEXT
S ile n c e
ACKN OW LEDGE
N EXT
IN I T I A L
N EX T
F I R S T -O U T
RESET
V ISU A L
F 2 M -1
A U D IB L E
S ilen ce fu n ctio n n o t sh o w n . S ee lin e d iag ra m ab o v e.
F irst-O u t S e q u en ce "F FA M 2 "
S eq u en ce " F FA M 2 " F ea tu res:
S ilen c e, A c k n o w led g e , R e set, a n d Te st
p u sh b u tto n s
A la rm a u d ib le d ev ic e
L o ck -in o f m o m e n tary a larm s u n til
ac k n o w led g e d
O p tio n 1 : S ilen c e p u sh b u tto n to sile n ce
th e a u d ib le d e v ice w h ile reta in in g
F irst-O u t fla sh in g in d ica tio n
F lash in g in d ic atio n fo r first a larm
o n ly. N ew s u b s eq u e n t ala rm s h a v e
th e s am e v isu a l in d ica tio n s a s
ac k n o w led g e d ala rm s
F irst-O u t p o in t ca n o n ly b e res et a fte r it
h as re tu rn ed to n o rm a l
M a n u a l res et o f a c k n o w led g ed a la rm
in d ica tio n a fte r p ro c ess co n d itio n s
retu rn to n o rm a l
O p era tio n al test
IS A
REFERENCE
ALARM
D E V IC E
NORM AL
R e se t
W h ile N o rm a l
ABNORM AL OR
NO RM AL
P
ACK NO W LED GED
S
ON
V
S IL E N T
A
A L E RT
ACKN OW LEDG E
S
O FF
V
S IL E N T
A
Subsequent
to
A b n o rm a l
ABNORM AL OR
P
NORM AL
SUB SEQ UENT
S
ALARM
S ile n ce
A ck n o w le d g e
R e set W h ile N o rm al
ON
V
A U D IB L E
A
ABNORM AL OR
NORM AL
P
F IR S T S IL E N C E D
S
FLA SH IN G
V
S IL E N T
A
RET URN TO N ORM AL
RETURN TO NORM AL
BEFORE ACK.
IN IT IA L
IN IT IA L
NORM AL
IN IT I A L
NEXT
IN IT IA L
NEXT
P
NORM AL
V IS U A L
F FA M 2
A U D IB LE
N o te : S ile n c e fu n c tio n n o t sh o w n . S e e lin e d ia g ra m a b o v e . D e p re ss in g R e se t b u tto n w ill c a u s e lig h t to g o S te a d y O n .
N EX T
NEXT
F ir st to A b n o rm a l
AB NO RM AL O R
NORM AL
R ese t
W h ile
N o rm al
P
FIRST A LA RM
S
F L A S H IN G
V
A U D IB LE
A
A c k n o w le d g e o r
S ile n c e
ACK NOW LEDG E
IN IT IA L
NEXT
F IR S T -O U T
RESET
S tan d ard S eq u en c e "A "
S eq u en ce " A " F ea tu res:
A c k n o w le d g e an d Te st p u sh b u tto n s
A la rm a u d ib le d e v ice
L o c k -in o f m o m e n ta ry a la rm s u n til
ac k n o w le d g ed
T h e a u d ib le d e v ic e is sile n c e d a n d
fla sh in g sto p s w h en a c k n o w le d g e d
A u to m a tic re se t o f a c k n o w le d g e d
ala rm in d ic a tio n s w h e n p ro c e ss
co n d itio n s re tu rn to n o rm a l
O p e ra tio n a l te st
IS A
REFERENCE
A LA RM
D E V IC E
N O RM AL
P
N O RM AL
S
O FF
V
S IL E N T
A
R etu rn to
N o rm al
ABNORM AL OR
NORMAL
P
A LA RM
S
V
F L A S H IN G
V
A
A U D IB L E
A
ABNORMAL
P
ACKNOW LEDGED
S
ON
S IL E N T
NORM AL
A c k n o w led g e d
W h ile A b n o rm a l
ACKNOW LEDGE
A L E RT
To A b n o rm a l
RETURN TO
NORMAL
BEFORE ACK .
RETURN TO
NORM AL
ACK N OW LED G E
RE SE T
V IS U A L
IS A -A
A U D IB L E
S tan d ard S eq u en ce "M "
S eq u en ce " M " F ea tu res:
A c k n o w le d g e , R e se t, a n d Te st
p u sh b u tto n s
A larm a u d ib le d e v ice
L o ck -in o f m o m e n ta ry a la rm s u n til
a ck n o w le d g e d
T h e a u d ib le d ev ic e is sile n c e d a n d
fla sh in g sto p s w h en a c k n o w le d g e d
M a n u a l re se t o f ac k n o w led g ed a la rm
in d ic atio n s a fte r p ro c e ss c o n d itio n s
retu rn to n o rm a l
O p e ratio n a l te st
IS A
REFEREN CE
ALARM
D E V IC E
V IS U A L
IS A -M
A U D IB L E
NORMAL
NORM AL
P
NORM AL
S
O FF
V
S IL E N T
A
R eset
W h ile N orm al
To A b n o rm al
ABNORM AL OR
NORMAL
P
ABNORM AL OR
NORMAL
P
ACKN O W LED G ED
S
ALARM
S
ON
V
F L A S H IN G
V
S IL E N T
A
A U D IB L E
A
A L E RT
ACKN O W LEDG E
A ck n o w ledg e
RET URN TO
N O RM AL
RETURN TO
NORMAL
B E FO R E A C K .
ACKN O W LEDG E
R E SE T
S tan d a rd S e q u en ce "R -1 2 C "
S e q u e n ce " R -1 2 C " F e a tu re s:
A c k n o w le d g e, R es et, a n d Te st
P u sh b u tto n s
A la rm a n d rin g b a c k a u d ib le d e v ic e s
T h e a u d ib le d e v ic e is sile n c e d a n d
fla sh in g s to p s w h en a c k n o w le d g e d
R in g b a c k v isu a l a n d a u d ib le
in d ica tio n s w h e n p ro c es s c o n d itio n s
re tu rn to n o rm a l
M a n u a l re se t o f rin g b a c k in d ic a tio n s
O p e ra tio n a l te st
N O RM AL
R e se t
N O RM AL
P
R IN G B A C K
S
C O LO R #2
F L A S H IN G
V
A LA RM
D E V IC E
NORM AL
S
OFF
V
S IL E N T
AA
S IL E N T
RA
To A b n o rm a l
ABNORM AL OR
NORMAL
A c k n o w le d g e
W h ile
N o rm a l
S IL E N T
AA
A U D IB L E
RA
R e tu rn to N o rm a l
R e tu rn
to N o rm a l
IS A
REFERENCE
P
N O RM AL
ABNORM AL
S
COLOR #1 ON
V
S
COLOR #1
F L A S H IN G
V
A U D IB L E
AA
S IL E N T
RA
A c k n o w le d g e
W h ile A b n o rm a l
P
ACKNOW LEDGED
P
A LA RM
S IL E N T
AA
S IL E N T
RA
A L E RT
ACKNOW LEDGE
RETURN TO
NORM AL
RETURN TO
NORMAL
BEFORE ACK .
ACK N OW LED G E
C O LO R #1 FLA SH
CO LO R #1 O N
C O LO R #2 FLA SH
C O LO R #2 FLA SH
CO LO R #2 FLA SH
*
*
*
RE SE T
V ISU A L
R -1 2
A U D IB L E
*
A d is tin c tly d iffe re n t rin g b a c k a u d ib le c a n b e p ro v id e d in m o s t c a se s
S eq u en ce "F 3 C "
S eq u e n ce " F 3 C " F e a tu res:
A c k n o w le d g e, F irst-O u t R ese t, an d
Te st P u sh b u tto n s
A larm au d ib le d ev ic e
L o ck -in o f m o m e n ta ry a la rm s u n til
ac k n o w le d g ed
F irst-O u t c o lo r is d iffe re n t fro m
su b seq u e n t c o lo r
F irst-O u t R e set p u sh b u tto n to
ch a n g e th e F irst-O u t v isu al
in d ic atio n to b e th e sa m e as
su b seq u e n t v isu al in d ic atio n s
A u to m a tic rese t o f ac k n o w le d g ed
alarm in d ic atio n s w h en p ro ce ss
co n d itio n s re tu rn to n o rm al
O p e ra tio n a l test u sin g se q u en c e:
Te st; F irst-O u t R e se t; A c k n o w le d g e
IS A
REFEREN CE
ALARM
D E V IC E
NORMAL
R e tu rn
to N o rm a l
ABNORMAL
P
SU B SE Q U E N T
ACKN OW LED GED
S
A c k n o w le d g e
W H IT E O N
V
W h ile
N o rm a l
S IL E N T
A
F ir s t-O u t R e s e t
W h ile A b n o rm a l
P
NORMAL
S
O FF
V
S IL E N T
A
A c k n o w le d g e S u b se q u e n t
to
W h ile
A b n o rm a l
N o rm a l
ABNORMAL OR
P
NORMAL
SU B SE Q U E N T
S
ALARM
W H IT E F L A S H IN G
V
A U D IB L E
A
F ir s t-O u t R e s e t
W h ile N o rm a l
F irst to A b n o rm a l
ABNORMAL OR
NORMAL
F irst-O u t
R e se t
F IR S T
ACKN OW LED GED
S
RED O N
V
S IL E N T
A
RETURN TO NO RM AL
RETU RN TO NO RM AL
B E FO RE A C K .
NEXT
IN IT IA L
NEXT
IN IT IA L
IN IT IA L
N EXT
IN IT IA L
RED
W H IT E
RED
W H IT E
RED
RED
W H IT E
RED
ACKNO W LED GE
NEXT
A U D IB L E
A U D IB L E
A
ACKN OW LEDGE
V IS U A L
F3C
V
P
IN IT IA L
A L E RT
S
R E D F L A S H IN G
A c k n o w le d g e
ABNORMAL
NO RM AL
P
F IR S T A L A R M
N EX T
F IR S T -O U T
RESET
S tan d a rd S eq u en ce " R -1 2 "
S e q u e n c e " R -1 2 " F ea tu re s:
A c k n o w le d g e , R e se t, a n d Te st
p u sh b u tto n s
A larm an d rin g b a c k a u d ib le d e v ic es
T h e a u d ib le d ev ic e is sile n c ed a n d fa st
fla sh in g sto p s w h e n ac k n o w le d g ed
R in g b a ck v isu a l a n d a u d ib le
in d ic a tio n s w h e n p ro c e ss co n d itio n s N O R M A L
re tu rn to n o rm a l
R IN G B A C K
M a n u al re se t o f rin g b a c k in d ic atio n s S L O W F L A S H IN G
O p e ra tio n al te st
A n n u n c ia to r s e q u e n c e s a re fro m
IS A S ta n d a rd S 1 8 .1 . C
In s tru m e n t S o c ie ty o f A m e ric a .
1 9 7 9 , re p rin te d w ith p e rm is s io n .
P
S
V
P ro c e s s
S equ ence
V is u a l
IS A
REFERENCE
A
AA
RA
N O RM AL
R e se t
S IL E N T
AA
S IL E N T
RA
S
To A b n o rm a l
ABNORM AL OR
NORMAL
V
S IL E N T
AA
A U D IB L E
RA
A L E RT
V
A c k n o w le d g e
W h ile
N o rm a l
R e tu rn to N o rm a l
R e tu rn
to N o rm a l
NORM AL
S
OFF
P
A u d ib le
A la rm A u d ib le
R in g b a c k A u d ib le
A LA RM
D E V IC E
P
N O RM AL
ACKNOW LEDGE
ABNORM AL
S
ON
V
S IL E N T
AA
S IL E N T
RA
S
FA S T F L A S H IN G
V
A U D IB L E
AA
S IL E N T
RA
A c k n o w le d g e
W h ile A b n o rm a l
P
ACKNOW LEDGED
RETURN TO
NORM AL
RETURN TO
NORMAL
BEFORE ACK .
ACK N OW LED G E
SLO W
SLOW
SLOW
V ISU A L
FA S T
R -1 2
A U D IB L E
*
A d is tin c tly d iffe re n t rin g b a c k a u d ib le c a n b e p ro v id e d in m o s t c a se s
*
*
P
A LA RM
*
RE SE T
APPENDIX B
ORDER CODE DEFINITION
and SPECIFICATIONS
AN-3196B-MOD Annunciator
ORDER CODE
Enclosures:
General purpose standard panel or surface mount
enclosures. Optional NEMA 4/12 wall mount
enclosures.
AN-3196B-MOD Specifications
Input Signals:
NO or NC contacts, switch selectable
Output:
A. LED indicator per point
B. Audible and Reflash Output Relay
Contacts rated at:
5A @ 24 VDC/120 VAC, 3 A @ 240 VAC, or
0.1 A @125 VDC
C. Optional remote mounted audible devices
D. 24 VDC @ 0.10 A available for driving audible
device
Ambient Temperature Range:
32(F to 140(F (0(C to 60(C)
Labeling:
Black lamacoid legend plates with white lettering
for each point, plus one for unit identification (see
engraving information)
Isolation: 1700 VDC
Surge Withstand Capability (SWC):
Test conforms to ANSI C37.90.1-1989 (Oscillatory)
and IEC 801-4 Level 2.
Weight: 9lbs. (4.09 kg) Panel Mount 53 lbs.
(24 kg) in NEMA Enclosure
Relative Humidity:
0% to 95% (non-condensing)
Power Source and Requirements:
A. 120 VAC: 120 VAC ± 10%, 50-60Hz at
100 mA maximum
B. 240 VAC: 240 VAC ± 10%, 50-60Hz at 50 mA
maximum
C. 125 VDC: 105 VDC to 140 VDC at 100 mA
maximum
D. 24 VDC: 20 VDC to 28 VDC at 400 mA
maximum
E. 48 VDC: 44 VDC to 52 VDC at 250 mA
maximum
Terminals:
Screw Barrier type
12 AWG wire maximum
Controls:
Internal Test, Acknowledge, Silence and Reset
pushbuttons
Field Contact Voltage:
A. Isolated, internally supplied 125 VDC or 24
VDC for 48 VDC, 125 VDC, 120/240 VAC
Prime Power
B. Non-isolated, internally supplied 24 VDC for
24 VDC prime power or 48 VDC prime power
C. Isolated externally supplied 125 VDC, 48 VDC,
24 VDC, 120 VAC
B-1
Legend Plate
Engraving Sizes
Letter Size
1/8"(3.2mm)
5/32"
3/16
1/4
Other sizes available upon
request
Maximum #
of Lines
Maximum # of
Characters
Per Line
3
3
2
1
22
18
14
11
Rochester Instrument Systems
AN-3196B-MOD Ordering
The AN-3196B-MOD is supplied in the following versions, stocked and immediately available from the
RiS factory. Individual model numbers are defined by the following fill-in items:
AN-3196B - MOD -
1
Sequence
2
3
4
Prime
Field Contact
Audible
Power
Voltage
Options
1. Sequence
A
Auto Reset
F2M-1
Manual Reset First-Out with no
subsequent alarm flashing and
silence push-button.
Optional:
A4, R, M, R12, FFAM2, F3A, F1A,
F2A
2. Prime Power
F
24 VDC
E
48 VDC
C
125 VDC
B
120 VAC
A
240 VAC
5
Reflash
-
6
Enclosure
-
7
Engraving
4. Audible Options
*SNS Sonalert Steady Tone
Remote Mount
*SNP Sonalert Pulsing
Remote Mount
HAC 120 VAC Remote Horn
HDC
24 VDC Remote Horn
HDH 125 VDC Remote Horn
NR
Not Required
*Not integrally mounted in NEMA 4/12
5. Reflash Option
AR
Automatic Reflash
MR
Manual Reflash (Standard)
3. Field Contact Voltage
Internally Supplied:
D
125 VDC
X
24 VDC
T
48 VDC
6. Enclosure
PM
Panel Mount
SM
Surface Mount
4WM Wall mount, NEMA 4
12WM Wall mount, NEMA 12
Customer Supplied:
D/C
125 VDC Isolated
X/C
24 VDC Isolated
T/C
48 VDC Isolated
Y/C
120 VAC Isolated
7. Engraving Point Legends
Y
Engraving provided by Rochester
(Legends supplied by user)
N
Engraving not required with order
(Blank tags provided)
B-2
Rochester Instrument Systems
APPENDIX C
SPARE PARTS
Rochester Instrument Systems
AN-3196B-MOD Annunciator
SPARE PARTS
SPARE PARTS
The MicroLarm AN-3196B-MOD Visual Annunciator is frequently used to monitor
critical operations. We strongly recommend that you stock sufficient spare parts to
prevent interruption to this monitoring function. The following lists give minimum
recommended quantities.
N O T I C E
ALWAYS PROVIDE THE ANNUNCIATOR SERIAL NUMBER
WHEN ORDERING SPARE PARTS TO MAKE SURE THAT
YOU RECEIVE THE CORRECT PARTS.
DESCRIPTION
RIS PART #
QUAN
FOR PRIME
POWER
1/10 Amp Fuse (slo-blo)
0620-310
3
All
1/4 Amp Fuse (slo-blo)
0620-451
3
All
½ Amp Fuse (slo-blo)
0620-450
3
24VDC, 48VDC
½ Amp Fuse
0620-451
3
125VDC, 120VAC
Lamacoid Tags
1036-106
As Req'd.
All
Microcomputer IC (SCM)
1070-412
3
All
Microcomputer IC (CSM)
1070-416
3
All
NOTE:
If the Annunciator System is being used in critical applications, it is
strongly recommended that you maintain one complete unit as a
spare.
C-1
Rochester Instrument Systems
APPENDIX D
ELECTROSTATIC DISCHARGE
Rochester Instrument Systems
ELECTROSTATIC DISCHARGE
D.1
INTRODUCTION
We are all familiar with static electricity. It is the charge we build up when we walk
across a rug. It is possible to build up as much as a 25,000 volt charge on your body or
clothing. When this static electricity discharges from your body to a conductive object or
surface, such as may occur when touching a computer keyboard, the discharge is referred
to as an Electrostatic Discharge (ESD).
If this discharge occurs over a very short period of time, as it typically does,
exceptionally high currents, and therefore power (watts) can be produced. For example, if
there is a 200 millijoule charge on your body and it discharges in 100 microseconds, a 2000
watt surge is produced. A 2000 watt surge is more than sufficient to destroy most
semiconductor junctions in transistors, diodes, or integrated circuits.
In many cases, a device subjected to an Electrostatic Discharge is only damaged
initially. It does not actually fail until sometime later. That is, it is a time delayed failure. As
a result, it is not unusual for there to be repeated failure of the same device. That is, the
device can be mishandled during installation, leading to a time delayed failure. A few weeks
or months later the device again fails and is replaced, and potentially again mishandled. This
process can then repeat.
The time delay until failure can be a few days or several months, depending on how
severely the part was damaged by the Electrostatic Discharge. Studies have been made on
the failure mechanism of electronic devices. These studies have shown that Electrostatic
Discharge was the root cause of device failures in as many as 50% of the cases.
Because you do not see or feel an Electrostatic Discharge, does not mean that one
has not occurred. For most people, a discharge has to be in the range of 2000 to 3000 volts
before they even become aware of it. Voltage levels much lower than this can destroy most
electronic devices.
D-1
D.2
PREVENTION TECHNIQUES
There are two basic approaches to preventing electronic devices and assemblies from
being damaged by Electrostatic Discharge. The first is to prevent any buildup of static
electricity. This eliminates the source of Electrostatic Discharge.
The second approach is to prevent an Electrostatic Discharge from occurring. Any
static charge present is bled off in a safe, controlled manner.
There are a number of steps that can be taken to prevent the buildup of static
electricity. They all involve the basic principle that a grounded, conductive surface will not
build up a static charge. Any charge present will bleed off to ground.
Since static charges are normally limited to very small amounts of energy, typically
less than a joule, a surface does not have to be highly conductive to effectively bleed off any
charge. For instance, in electronic factories, service centers, and other facilities which
regularly handle electronic devices and assemblies, static build up is prevented by such
techniques as using conductive paint on floors, benches and cabinets. Conductive
carpeting, bins made of conductive plastic, conductive mats, and grounded metal work
benches are also used.
In semiconductor factories and similar areas where the potential for Electrostatic
Discharge damage to devices is extremely high, employees are issued conductive clothing.
When personnel actually handle assemblies and devices, they wear conductive ground
straps on their wrist and/or heel to ground themselves. The key factor is to prevent any static
electricity from building up. If there is no static, there will be no Electrostatic Discharge.
In a field situation, electronic assemblies and electronic devices ideally should be
handled only at appropriate repair stations, such as a grounded metal bench, with a
grounded conductive floor mat. Therefore, if a printed circuit board or some other electronic
assembly needs to be repaired, it should ideally be removed from a machine or instrument
and taken to a repair station to be worked on.
The device should be transported in a conductive bag or bin and; when making
repairs or handling parts or assemblies, service personnel should wear a wrist and/or heel
ground strap. Spare parts and assemblies should be stored in conductive bags or
conductive bins and should only be handled when at an appropriate repair station.
Even taking care to prevent the buildup of static electricity does not assure that there
D-2
never will be a dangerous static charge present. If a static charge is present, the goal is to
prevent a large, rapid discharge from occurring or, if it does occur, to make it occur where
it will do no damage. The ideal way to prevent a destructive discharge from occurring is to
discharge any static present through a large impedance.
Repair personnel should ground themselves through a wrist and/or heel strap. Their
tools should be grounded through a conductive mat before touching any potentially static
sensitive assemblies or devices. Conductive mats and heel and wrist straps have megohms
of impedance, and therefore any charge present is bled off in a controlled manner through
this large impedance.
When this is not possible or practical, personnel can minimize the probability of doing
damage to electronic parts by first touching a water pipe, the chassis or enclosure of an
electronic assembly, or some other ground point. However, this approach will likely result
in the charge being rapidly discharged. This can produce a high energy magnetic pulse
which, in turn, could produce potentially damaging eddy currents in printed circuit board
traces.
It is always best to discharge any charge present through a large impedance. When
handling printed circuit boards or other electronic assemblies, personnel should try to avoid
touching circuit traces or devices with their bare hands or fingers. That is, hold the board by
its edges. If at all possible, a board should be removed for repair and be put into a
conductive bag or bin and then taken to an appropriate repair station to be worked on.
Do not forget that tools can also carry a static charge. Use only grounded soldering
irons. Touch tools to ground before touching an electronic assembly or device. Store tools
in a conductive tool carrier (metal or conductive plastic), and then ground the carrier before
using any tools.
D-3
D.3
SUMMARY OF ESD GUIDELINES
1.
Prevent static buildup by using conductive paints, carpeting, mats and metal
surfaces. Use appropriate grounding techniques, including wrist and heel
straps for personnel.
2.
Store or transport electronic devices, parts or assemblies in conductive bags
or bins.
3.
Only perform repairs at an appropriate repair station.
4.
When handling electronic assemblies or printed circuit boards, try to avoid
touching traces on the printed circuit board or static sensitive devices.
5.
Remember that tools are a source of static electricity. Only use grounded
soldering irons. Ground tools before using them to bleed off any charge
buildup.
6.
Discharge yourself before touching or handling any electronic assembly or
device. This can be done by touching a good ground point before touching
any electronic devices or assemblies. Preferably, discharge any static charge
through a high impedance such as a wrist or heel strap.
D-4
APPENDIX E
REPAIRS AND WARRANTY
Rochester Instrument Systems
Procedures for Factory Repair and Return
A.
1.
2.
3.
4.
5.
6.
B.
Obtain a Returned Material Authorization (RMA) number by calling AMETEK Repair
Sales and giving the following information:
Model and Serial Number of the equipment.
Failure Symptom - Be Specific
Approximate date of installation.
The site name and address of the failed equipment.
Complete shipping information for the return of the equipment if other than the
operating site.
Name and telephone number of person to contact if questions arise.
Enclose the information with the equipment and pack in a commercially accepted
shipping container with sufficient packing material to insure that no shipping damage will
occur. Mark the outside of the container with the RMA number. Ship to the appropriate
location:
Attention: Repair Department
AMETEK Power Instruments
255 North Union Street
Rochester, New York 14605 USA
Telephone: (716) 238-4993
Fax: (716) 238-4097
C.
Your equipment will be tested, repaired, and inspected at the factory. Factory turnaround is ten working days or less (excluding shipping time).
D.
For emergency service or repair status information, please contact the AMETEK Repair
Sales Engineer at (716) 238-4993.
WARRANTY — AMETEK warrants equipment of its own manufacture to be free from defects in material and
workmanship, under normal conditions of use and service. AMETEK will replace any component found to be defective,
upon its return, transportation charges prepaid, within one year of its original purchase. AMETEK will extend the same
warranty protection on accessories which is extended to AMETEK by the original manufacturer. AMETEK assumes no
responsibility, expressed or implied, beyond its obligation to replace any component involved. Such warranty is in lieu of
all other warranties expressed or implied.
ROCHESTER
AMETEK Power Instruments
255 North Union Street
Rochester, New York 14605 USA
Rochester Instrument Systems
APPENDIX F - ENGINEERING DRAWINGS
TABLE OF CONTENTS
DRAWING
DESCRIPTION
A-1052-675
EQUIVALENT COMPONENT REFERENCE GUIDE
C-1072-210
AN-3196B-MOD POWER SUPPLY SCHEMATIC / ASSEMBLY
D-1080-578
AN-3188B-MOD SEQUENCE MODULE SCHEMATIC
D-1080-575
AN-3187B-MOD CSM SCHEMATIC / ASSEMBLY
D-1072-029
AN-3196B-MOD ASSEMBLY DRAWING
D-1072-030
AN-3196B-MOD CUSTOMER ACCESORIES DRAWING
D-1072-216
AN-3196B-MOD PANEL-MOUNT MOUNTING AND OUTLINE
D-1047-623
AN-3196B-MOD SURFACE-MOUNT MOUNTING AND OUTLINE
D-1080-571
AN-3196B-MOD MODBUS INTERFACE SCHEMATIC
Rochester Instrument Systems