Instruction manual
878 Panel Indicator
Instruction manual 878
panel indicator
(software version > A1.3)
November 2009
Part no. 4416.263
Revision 2
Enraf B.V.
P.O. Box 812
2600 AV Delft
Netherlands
Tel.
Fax
E-mail
Website
: +31 15 2701100
: +31 15 2701111
: enraf-nl@honeywell.com
: http://www.honeywellenraf.com
Offices in: Netherlands - France - Germany - Russia - UK - USA - China - Singapore
Instruction manual 878 Panel Indicator
Page 1
Copyright 1993 - 2009 Enraf B.V. All rights reserved.
Reproduction in any form without the prior consent of Enraf B.V. is not allowed. This manual is for information
only. The contents, descriptions and specifications are subject to change without notice. Enraf B.V. accepts no
responsibility for any errors that may appear in this manual.
The warranty terms and conditions applicable in the country of purchase in respect to Enraf B.V. products are
available from your supplier. Please retain them with your proof of purchase.
Page 2
Instruction manual 878 Panel Indicator
Preface
Preface
This manual is intended for technicians involved with the installation, commissioning and service of the
Honeywell Enraf Series 878 panel indicator
For mechanical and electrical installation of the 878 panel indicator, refer to section 3 and 4.
A description preceding the technical procedures gives the technical information necessary to understand its
functioning. It is recommended to read this description prior to performing any of the procedures.
Safety and prevention of damage
Safe execution of the procedures in this manual requires technical experience in handling tools, and knowledge
of safety regulations in handling electrical installation in hazardous environments.
"Warnings", "Cautions", and "Notes" have been used throughout this manual to bring special matters to the
immediate attention of the reader.
·
·
·
A Warning concerns danger to the safety of the technician or user;
A Caution draws attention to an action which may damage the equipment;
A Note points out a statement deserving more emphasis than the general text, but does not deserve a
"Warning" or a "Caution".
The sequence of steps in a procedure may also be important from the point of view of personal safety and
prevention of damage; it is therefore advised not to change the sequence of procedural steps or alter a
procedure.
Legal aspects
The information in this manual is copyright property of Enraf B.V., Netherlands.
Enraf B.V. disclaims any responsibility for personal injury or damage to equipment caused by:
·
·
·
Deviation from any of the prescribed procedures;
Execution of activities that are not prescribed;
Negligence of the general safety precautions for handling tools, use of electricity and microwave
radiation.
EC declaration of conformity
This instrument is in conformity with the protection requirements of EC Council Directive 89/336/EEC.
The CE conformity marking fulfills the provisions of
EN 50081-2 Generic Emission Standard
EN 50082-2 Generic Immunity Standard
when installed, maintained and applied according to requirements as specified in this manual.
For delivery within EC only.
Additional information
Instruction manual 878 Panel Indicator
Page 3
Preface
Please do not hesitate to contact Honeywell Enraf or its representative if you require additional information.
Page 4
Instruction manual 878 Panel Indicator
Table of contents
Table of contents
Preface
1
2
3
4
5
6
7
...................................................................................................................................................3
Introduction 5
1.1 General information .............................................................................................................................5
1.2 Principle of operation ...........................................................................................................................5
1.3 Functionality.........................................................................................................................................5
1.3.1 Level (temperature) window .......................................................................................................6
1.3.2 Water interface window ..............................................................................................................6
1.3.3 Density windows.........................................................................................................................6
1.4 Operational modes...............................................................................................................................7
1.5 Data accuracy and integrity .................................................................................................................7
Storage and unpacking ..................................................................................................................................8
2.1 Storage ................................................................................................................................................8
2.2 Unpacking and inspection ....................................................................................................................8
Mechanical installation ...................................................................................................................................9
3.1 Preparation of the panel indicator ........................................................................................................9
3.2 Mounting a new indicator .....................................................................................................................9
3.3 Removing an old indicator....................................................................................................................9
Electrical installation.....................................................................................................................................10
4.1 Rear panel cabling .............................................................................................................................10
4.2 Preparation of the instrument.............................................................................................................10
4.3 Changing the mains voltage...............................................................................................................10
4.4 Electrical connections ........................................................................................................................11
Software
12
5.1 Updating the software ........................................................................................................................12
5.2 Initializing ...........................................................................................................................................12
Commissioning.............................................................................................................................................13
6.1 Mechanical and electrical installation.................................................................................................13
Display & configuration ................................................................................................................................14
7.1 Display ...............................................................................................................................................14
7.2 Display contrast .................................................................................................................................14
7.3 The keyboard .....................................................................................................................................14
7.4 Indicator LEDs ...................................................................................................................................15
7.5 Jumper protection.....................................................................................................................15
7.6 Selection of the menus ......................................................................................................................15
7.7 Table of menu settings.......................................................................................................................16
7.8 Menus ................................................................................................................................................17
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Appendix G
Appendix H
Index
Dimensional drawing ................................................................................................................21
Specifications ...........................................................................................................................22
Window selection .....................................................................................................................24
Service functions ......................................................................................................................29
Error display screen .................................................................................................................30
Recommended spare parts ......................................................................................................31
Host communication.................................................................................................................32
ASCII table ...............................................................................................................................35
.................................................................................................................................................36
Instruction manual 878 Panel Indicator
Page 5
Introduction
1
Introduction
1.1 General information
The 878 panel indicator is the latest addition to the range
of Honeywell Enraf indicators. This indicator provides
remote indication for radar, servo and hydrostatic tank
gauging instruments via the Honeywell Enraf fieldbus,
using the GPU protocol.
The 878 displays a complete set of tank data such as:
·
·
·
·
·
·
product level
product interface level
temperature
density (servo or observed)
gauge address
high and low level alarms
and operational status information on its clear back lighted
4 x 20 characters liquid crystal display.
Configuration of the various functions is easily done via the keys on the front panel and a display menu.
The indicator can be optionally equipped with two alarm output relay contacts controlled by the gauge's high and
low level programmable alarms.
This indicator is developed for indoor use. Flexible interchanging with the older indicator series (like 856, 826) is
possible while the panel cut-out is matching that of the older instruments, although the connection has to be
changed. The instrument has an IP20 protection (only for indoor use).
1.2 Principle of operation
A microprocessor converts the received GPU-protocol messages into a form suited for the display and adds the
selected dimensions. Dimensions and other display parameters are preprogrammed. They can be changed by
entering the setup menu. All settings are stored in NOVRAM (non-volatile memory). To prevent unintentional
changes of NOVRAM settings, these settings can be protected by means of jumpers in the instrument.
1.3 Functionality
A row of four soft-keys on the front panel enables the user to transmit various commands to the field instrument
connected to the 878 panel indicator. The commands to be given depend on the selected display window.
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Instruction manual 878 Panel Indicator
Introduction
1.3.1 Level (temperature) window
For the level (temperature) window these commands are test, lock, unlock and block.
These commands are only applicable for servo gauges.
Test
The Test command raises the displacer for a few seconds, after which it returns to the liquid surface.
The test command performs a repeatability test of the level measurement.
Lock
After a Lock test command the displacer is raised until the motor high limit switch is reached. This
command can be cancelled by an Unlock.
Unlock The Unlock command is used to break off any operational command.
Block The Block command stops the displacer.
1.3.2 Water interface window
There are two different commands to start a water interface measurement.
·
Initiating a water measurement (W_M) command causes the 878 panel indicator to monitor the displacer
position. As soon as the water level is detected, the displacer will stop at the interface layer and the
measured level value will be displayed. An unlock command must be issued to raise the displacer to the
product level.
·
In case of an interface dip (W_D) command the indicator operates identical to the interface measurement
command with the exception, that when the interface level is detected, the displacer automatically returns
to the product level.
In both cases the interface level will be stored and displayed on the water window.
1.3.3 Density windows
Density can be measured and displayed in two different ways.
·
A density dip (D_D) command can be issued to the 854 to start a Tank Profile (TP) density measurement
at 10 level positions equally divided over the product level. From the 10 measured values the 854
calculates the average density. This average density is displayed in the servo density window. In order to
economize operations of the 854 ATG, a combined water and density dip (C_D) can be initiated. In this case
first the interface measurement will be performed followed by the average density measurement.
·
In addition to the above mentioned method observed density can be retrieved by means of two different
measuring systems. These are based on HIMS and HTG.
A HIMS system measures with either a radar gauge or a servo gauge the liquid level height.
A pressure transmitter at the bottom of the tank measures the hydrostatic pressure. From the level and the
hydrostatic pressure the observed density is calculated.
A HTG system makes use of two pressure transmitters to calculate the observed density.
The observed density measured via a HIMS or HTG system is displayed in the observed density window.
Instruction manual 878 Panel Indicator
Page 7
Introduction
1.4 Operational modes
Three operational modes can be chosen:
• stand alone
When used in this mode the 878 panel indicator is directly connected to the field
instrument. No host computer system is required. Operational commands supported by
the various field instruments can be issued via the 878 panel indicator.
• fall-back
In this mode (optionally) a host computer system interrogates the field instruments.
When the host system would hamper, the 878 panel indicator takes over the interrogation
of the field instrument. In this manner a continued indication of the tank measuring data is
guaranteed. Immediately when the host system is back to normal, the indicator
automatically switches back to the listening mode.
Operational commands supported by the various field instruments can only be issued via the 878 panel
indicator in case the host computer system fails.
• listen
When used in listen mode the 878 panel indicator is connected to the Honeywell Enraf
fieldbus and "listens" to the communication, refreshing its display each time the
corresponding field instrument transmits its data after being polled by the host system.
1.5 Data accuracy and integrity
The communication between the 878 panel indicator and the field instruments is digital and occurs via the
Honeywell Enraf fieldbus with the GPU protocol.
Received data is continuously checked and in case of an error the possible incorrect data is removed from the
display and an error code is shown. This technique avoids incorrect reading and guarantees fast, reliable and
absolutely correct data transfer as required by Weights and Measures authorities.
The resolution of the level transmission is 0.1 mm and 0.01 °C for temperature. If the 878 panel indicator does
not receive data within a programmed period the indicator will clear the display and show a time-out message.
Page 8
Instruction manual 878 Panel Indicator
Unpacking
2
Storage and unpacking
2.1 Storage
During storage, the 878 panel indicator should be kept in its original packing.
2.2 Unpacking and inspection
Inspect the packaging on arrival and immediately notify the transporter or sales representative if there is any
damage. Don't throw away the packing. It will be use when further transport on site is needed or when the
instrument is returned for service or warranty.
Inventory checklist:
•
•
•
•
•
instrument in a housing of perforated steel; including rear-cover
two mounting brackets
a set fuses for 110 V/130 V and for 220 V/240 V
the instruction manual you are reading now
identification code sheet
The identification code specifies the type of instrument delivered and must agree with your order.
When the type on the label of your 878 panel indicator does not conform with the identification code, consult
your representative or Honeywell Enraf.
Instruction manual 878 Panel Indicator
Page 9
Mechanical installation
3
Mechanical installation
3.1 Preparation of the panel indicator
• Disconnect the rear cover by loosening the two screws. Press the leaf spring and slide the indicator out of
the housing.
• Slide the housing into the panel. Hook the bracket cams in the holes of the housing and fasten the
tightening screws until the mounting brackets are clamped against the panel rear-side (refer to figure 3.1).
3.2 Mounting a new indicator
Before inserting the indicator into the housing it is recommended to proceed with the electrical installation.
Insert the indicator into the housing until the leaf spring on the rear locks the instrument. Hook the rear cover in
on the left side and fasten the two screws on both corners.
Fasten the instrument when the electrical cables are connected. Fastening the back panel screws fixes the
instrument in the panel (refer to figure 3.1).
For Weights and Measures requirements it may be required to seal the instrument.
For this purpose the instrument is equipped with an eye on the end of the locking spring.
3.3 Removing an old indicator
The 878 panel indicator has the same panel cut-out as the
older 823, 825, 826 and 856 instruments.
• Detach all existing cabling on the rear side.
• Pull the old instrument out and loosen the two
screws on both sides, and remove the old housing.
•
Page 10
• Warning
Be sure that the cabling is disconnected from all electrical power sources before starting.
Instruction manual 878 Panel Indicator
Electrical installation
4
Electrical installation
4.1 Rear panel cabling
• The connectors can be connected to the cables before mounting the instrument.
Care for the right orientation of the connectors. The terminal layout is found in figure 4.2.
Use multicore or telephone cables.
• Apply the local regulations for the mains connection.
When the indicator is replacing an older Honeywell Enraf indicator, pay attention to the fact that the rear
panel connection differs.
Caution:
Always when the mains selector position is changed the value of the
primary fuse must be checked !
4.2 Preparation of the instrument
• Before sliding the 878 panel indicator in the panel and applying the mains voltage, check that the
mains voltage selector (refer to figure 4.1) is set to the right voltage.
The mains selector switch is found on the right-hand rear side, above the mains transformer.
4.3 Changing the mains voltage
The mains voltage is set in the factory according to your
order, together with the right fuse.
However, should the voltage be changed, check whether the
value of the primary fuse is according to the new voltage.
• The fuse F3 is located next to the mains connector
CN1. It has a flexible cap for protection against
touching.
Use
315 mA
630 mA
1A
T (= slow blow) for 220 V or 240 V
T (= slow blow) for 110 V or 130 V
T (= slow blow) for 65 V
• The fuse F1 and F2 are secondary fuses.
Use for
F1 1 A
F2 250 mA
T (= slow blow)
T (= slow blow)
• Loosen the locking screw of the mains selector switch, slide the switch to the required position.
• The voltage is indicated on the PCB-board.
• Insert the locking screw again and fasten.
• Remount the instrument.
Instruction manual 878 Panel Indicator
Page 11
Electrical installation
4.4 Electrical connections
·
Mains
·
Transmission
pins)
-
·
Connector CN1 (3 pins)
Connector CN2 (4
Pos. 1 and 2 always field instrument
Pos. 3 and 4 always host computer
Relays
Connector CN10 (12 pins)
(optional)
-
Page 12
Pos. 1, 2, 3 (Test)
Pos. 4, 5, 6 (Low alarm)
Pos. 7, 8, 9 (High alarm)
Pos. 10, 11, 12
(Fail)
Instruction manual 878 Panel Indicator
Software
5
Software
The 878 panel indicator is a microprocessor based instrument.
The resident software is installed in EPROM (Erasable Programmable Read Only Memory)
Nonvolatile data such as settings are stored in NOVRAM (see section 7.7).
Data input in the menu is automatically stored in NOVRAM when the ENTER key is pressed and it is not lost
when the mains power supply is interrupted.
5.1 Updating the software
When changing of software is required, the EPROM has to be exchanged and the NOVRAM has to be
initialized.
5.2 Initializing
Normally the NOVRAM is initialized (= formatted) at delivery and in that case the following procedure can be
skipped. Only after replacing the EPROM for upgrading the 878 panel indicator to a new software version,
initializing of the NOVRAM is needed.
To initialize the NOVRAM jumper 4 must be shorted. The jumpers are on the left side at the horizontal printed
circuit board (refer to figure 5.1).
The following display menus appear:
NOVRAM setup mode:
Press ENTER
Place the jumper in position 2 again.
Note:
The jumpers are only accessible when the 878 panel indicator is not sealed for Weights and Measures.
Instruction manual 878 Panel Indicator
Page 13
Commissioning
6
Commissioning
6.1 Mechanical and electrical installation
In this section a description is given of all actions to be taken when the 878 is mounted on site before it can be
used for the first time.
1. Check the mechanical installation (refer to section 3).
2. Check the electrical installation (refer to section 4).
3. Check the mains voltage setting and the value of the fuses (refer to section 4.3).
4. Apply the mains power supply.
If necessary adjust the display contrast with a small screwdriver by turning P1. It is warmly recommended to
use an isolated screwdriver. Pull-out the front panel (refer to figure 7.2).
5. After switching on the mains, the 878 panel indicator shows the start-up window within a few seconds.
After a while this window is replaced by the level (temperature) window or by the selected window in menu 8.
The instrument is now operational.
When the 878 panel indicator is used for the first time the nonvolatile memory contains the default settings
and some of these settings, as addressing and operation mode, must be programmed. This is done in the
Setup mode. The default NOVRAM settings are shown in section 7.7
6. Start with the SELECT Menu. The 878 panel indicator is delivered with default factory settings, as indicated
in the "Table of menu settings" in section 7.
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Instruction manual 878 Panel Indicator
Display & configuration
7
Display & configuration
7.1 Display
A bright lighted Liquid Crystal Display, with four rows of each twenty characters
shows continuously the selected measuring data (refer to figure 7.1).
The top row shows a programmable text which can be a product name or a
tank number.
The second and third row show the data received from the field instruments.
The fourth row is a message line or displays the abbreviated functions of the
soft-keys. There are five different display windows available which can be
selected in menu 8.
7.2 Display contrast
If necessary change the display contrast with a small isolated
screwdriver by turning P1.
Pull out the front panel (refer to figure).
Caution
Take care not to touch parts under tension as this might
damage the instrument.
7.3 The keyboard
There are two rows of each four soft-keys on the front panel.
The top row of keys is used to transmit the various commands
to the field instrument. The function of the keys depend on the selected window. The bottom row of the display
shows the abbreviated key function.
Key functions can be switched on or off in menu 10.
The keys 354 will only be operational after entering the
menu settings.
The bottom row is used for:
DISPLAY TEST
when pressing this key all dots in the display screen are presented shortly followed by
a blanked display, to check missing dots.
This key has a second function, when the fourth row of the display shows a fail
message, this message can be removed by pressing this key.
SELECT
when pressing this key the indicator windows or settings can be changed. By pressing
this key again the select mode can be left.
6
this key is only operational after entering the select menu and is used to step through
the various menus.
ENTER
this key is used to confirm data entered in the select menu.
Instruction manual 878 Panel Indicator
Page 15
Display & configuration
7.4 Indicator LEDs
Four red indicator LEDs are located above and two white indicator LEDs are located on the right side of the
display (refer to figure 7.1).
TEST
LA
HA
FAIL
RXD
TXD
this LED is on if the test relay is activated.
low level alarm message from the field instrument
high level alarm message from the field instrument
field instrument failure or 878 panel indicator failure
when this LED is flashing the 878 panel indicator receives data
when this LED is flashing the 878 panel indicator transmits data to the field instrument
The RXD and TXD LEDs can be disabled in menu 11.
7.5 Jumper protection
The jumper protection levels are:
·
·
·
level 1 - user
level 2 - W&M
level 3 - service
Menus settings are protected by jumper 1 and 2 only when the jumpers are removed. When the jumpers are
shorted the menu's are not protected. When using jumper 3 the relays and LEDs are tested. Remove also
connector C10 before using jumper 3. For jumper protections refer to section 7.7.
Note:
It is NOT possible to change settings when the 878 panel indicator is sealed by W&M see section 3.2.
7.6 Selection of the menus
The procedure to enter the SET-UP menu is as follows:
•
•
•
•
•
Press SELECT.
Select SETUP using the 5 or 6 the key.
Press three times ENTER
Scrolling through the menus is done using the 5 , 6 or the 4 3 keys.
Press ENTER, to enter the selected menu.
The setting of the menu can now be programmed.
To quit the selected menu the ENTER or the SELECT key can be pressed.
• When pressing the ENTER key the new programmed settings are stored.
• When pressing the SELECT key the new programmed settings are not stored.
Note:
Menu settings can only be altered in case the menu is not jumper protected.
All programmed settings are permanently stored in the NOVRAM, and protected against power failure.
Page 16
Instruction manual 878 Panel Indicator
Display & configuration
7.7 Table of menu settings
Menu
Menu name
Default settings
Possible selections
Address + TOI
a. Level
b. Temperature
c. Water
d. Servo density
e. Observed density
Address
99
99
99
99
99
Address
00...99 B, C, E
00...99 B, C, E
00...99 B, C, E
00...99 B, C, E
00...99
2
Baudrate
1200
1200, 2400
2
3
Time-out settings
a. Transmission time-out
b. Display time-out
minutes
1.0 min.
0.5 min.
selectable in steps of 0.5 minutes
00.0.....29.5
00.0.....29.5
2
Dimensions
a. Level
b. Temperature
c. Water
d. Servo density
e. Observed density
Dim.
m
°C
m
3
kg/m
kg/m3
Dimensions
m, ft, in, FIS
°C, °F
m, ft, in, FIS
3
kg/m , °API, lbs/cuft
kg/m3, °API, lbs/cuft
5
Zero format
ø
ø or 0
2
6
Decimal separator
.
. or ,
2
7
Operational mode
Listen
Listen, Stand alone, Fall-back
2
8
Window selection
a. Level
b. Temperature
c. Water
d. Servo density
e. Observed density
Small
On
On
On
On
Small, Large, Both, Off
On, Off
On, Off
On, Off
On, Off
9
Level / water scan TOR
B
B or L
10
Field commands
a. Test / lock
b. Block / unlock
c. Water measurement
d. Dens. measurement
yes
yes
yes
yes
yes, no
yes, no
yes, no
yes, no
11
Transm. LEDs
On
On, Off
2
12
Relay settings
a. Alarm relay mode
b. Relay config.
De-energized
note 1
energized / de-energized
2
3
Tank identifier
a. Tank identifier
b. Show level address
878 panel indicator A1.3
No
Alpha numeric characters
yes / no
2
Window names
a. Level / temp. small
b. Level / temp. large
c. Water
d. Servo density
e. Observed density
a. Level / temp. small
b. Level / temp. large
c. Water
d. Servo density
e. Observed density
Alpha numeric characters
2
1
4
13
14
TOI
B
B
B
B
B
W&M
appr
appr
appr
appr
appr
Jumper
TOI
1
B, C, E
W&M
appr/not appr
appr/not appr
appr/not appr
appr/not appr
appr/not appr
2
2
2
2
Note:
These parameters are set at NOVRAM init. They cannot be changed by the user.
Instruction manual 878 Panel Indicator
Page 17
Display & configuration
7.8 Menus
The following menus are available:
• Menu1
Address + TOI
For each address a TOI can be selected. TOI's are B, C or E (refer to appendix G).
Only when selecting C or E the contact status (external contact inputs from 811 servo gauge or 813
mechanical gauge transmitter) will be displayed.
• Menu 3 Time-out settings
transmission time-out is only used in fall-back mode. Selection of 0 minutes is not advisable: the instrument
will take over the communication as soon the host system has finalized a
request.
display time-out
determines the maximum display time of the data before refreshment. When
reaching a display time-out the displayed data is set to display time-out (TO).
Note:
In case a host fails to retrieve level, temperature or observed density data within the programmed time, a timeout will be displayed for the relevant item. When two or more items have a time-out the message "Display data
time-out" will be displayed on the bottom line of the display window.
•
Menu 4
Dimensions
Selection of dimensions is possible for the following measured values:
- level
- temperature
- water
- servo density
- observed density
m, ft, in, FIS
°C, °F
m, ft, in, FIS
3
kg/m , °API, lbs/cuft
3
kg/m , °API, lbs/cuft
In addition to the dimension a W&M approved / not approved selection can be made.
When selecting "not approved" the selected dimension will be replaced by '##'.
Display
Level
dimension
Level small
B record
Level small
L record
Level large
B/L record
Dimension
Metres
+xxx*xxx
±xxx*xxxx
xxx*xxx
m
Feet
+0xxx*xxx
±xxxx*xxx
xxx*xxx
ft
Inches
+0xxxx*xx
±xxxxx*xx
xxxx*xx
in
Fractions
+0xx'xx"xx
±xxx'xx"xx
xx'xx"xx
/16
Legend: the (*) asterisk will be replaced by the selected decimal separator
(selectable in menu 6). The (x) represents a level value.
Page 18
Instruction manual 878 Panel Indicator
Display & configuration
B/L record large display
As the level large display can only handle 6 characters there are some restrictions:
-
When displaying the level retrieved with an L record the 0.1 mm will be rounded to millimetres.
-
The '-' sign will only be displayed in case there are sufficient leading zero's available.
-
In case of a '-' sign and insufficient space to display the sign the level will not be displayed. In this
case the level will be replaced by dashes. However the level status and alarm status will be
displayed.
Density dimension
3
•
Menu 7
Density display
kg/m
ddddd*d
°API
±dddd*dd
lbs/cuft
ddd*ddd
Operational mode
Listen, stand alone or fall-back can be selected.
The fall-back mode can only be selected when the fall-back relay is mounted (option).
-
Listen
when used in this mode the 878 panel indicator is connected to the
Honeywell Enraf fieldbus and "listens" to the communication, refreshing its
display each time the corresponding field instrument transmits its data after
being polled by the host system.
If the host stops polling the displayed data will be cleared and a message will appear
(level time-out, temperature -, observed density - or display time-out).
-
Stand alone when used in this mode the 878 panel indicator interrogates and reads directly the
connected field instrument(s). No host computer system is required.
-
Fall-back
in this mode the host computer is master of the communication link and interrogates
the field instrument(s). When the computer system goes down the 878 panel
indicator starts automatically to interrogate the connected field instrument(s).
After a complete scan of the 878 panel indicator the indicator will listen for one second
whether the host is active before starting a new scan.
Note:
When the fall-back relay is defective the fail led will be on.
• Menu 8 Window selection
Switching a window on means it can be selected by entering the Select menu.
Switching a window off means that the window cannot be selected in the Select menu.
Switching to a large display window means that level data is displayed in triple size characters.
Instruction manual 878 Panel Indicator
Page 19
Display & configuration
• Menu 9 Level (water scan) TOR
B or L can be selected. B retrieves level with a resolution of "1 mm" and L in "0.1 mm"
(if supported by the field instrument).
• Menu 10 Field commands
When pressing a key of a disabled command the message "Command not allowed" appears on the display
window.
• Menu 12 Relay settings (option)
a.
alarm relay mode
(energized, de-energized)
In this menu the alarm relay mode, energized or de-energized can be selected. This applies only to the
high and low alarm relays (HA and LA) in the 878 panel indicator. The high and low alarm settings are
programmed in the field instrument.
b.
relay configuration
(fall-back/ other relays - present, absent) (read only).
The presence of the relays can be verified by selecting the relay configuration. The configuration cannot
be changed in this menu. During initialisation of the NOVRAM the indicator itself determines if and which
relays are mounted. Changing the configuration is only possible when the indicator is put in test mode
with help of jumper 3.
The fail relay is normally energized. This relay will be de-energized:
-
when the indicator has an operational failure.
during initialization until all displayed level data is valid.
during operation when any level data on the display is invalid.
when no answer on a request of the indicator is received.
The test relay is normally de-energized. This relay is activated in case the received level status information of
the field instrument is not valid.
Note:
During the execution of a combined water/density dip the low level alarm setting in the level gauge may be
tripped and activate the low level alarm relay in the 878 panel indicator. In order to avoid this, the test relay
(normally closed) may be switched in series with the low level alarm relay (normally open). This implies that the
low level alarm will only be true, in case of a valid level status.
Page 20
Instruction manual 878 Panel Indicator
Display & configuration
• Menu 13 Tank identifier
This menu enables the user to program a text string on the top row of the display window or to show the
gauge address. The text string is not visible in the large display screen (level).
a.
b.
tank identifier
show level address
yes/no
to be programmed
(for service purposes or sometimes required by W&M)
The first row of the display can be programmed with a text string chosen by the user
(e.g. a tank name or product name). The characters can be selected by using the 5 and 6 keys.
See appendix H for the table of supported characters.
• Menu 14 Window names
The texts can be changed using the 3 4 5 6 keys (refer to appendix H)
Instruction manual 878 Panel Indicator
Page 21
Appendix
Appendix A
Page 22
Dimensional drawing
Instruction manual 878 Panel Indicator
Appendix
Appendix B
Specifications
Mechanical
3
5
Dimensions:
panel cut-out (W x H) 106.5 x 91.5 mm
front panel
(W x H) 120 x 105 mm
depth(excluding front panel) 368 mm
(4 /16 x 3 /8 inch).
3
1
(4 /4 x 4 /8 inch).
1
(14 /2 inch).
Weight:
3.6 kg (7.2 lbs)
Housing:
stainless steel
front polished stainless steel covered with dull polyester, transparent window
Colour:
RAL 7030
General
Operation modes:
stand alone
listen
fall-back (option)
Commands:
accessible via push-buttons
Servo gauge commands:
Lock Test
Block Test
Unlock Test
Water measurement/dip
Density/dip
Electrical
Mains:
Voltage variation:
Frequency:
110 Vac, 130 Vac, 220 Vac, 240 Vac (optional) 65 Vac
+ 10% to - 20%
45 Hz to 65 Hz
Fuses:
315 mA T slow blow (220 /240 Vac)
630 mA T slow blow (110 /130 Vac)
1 A T slow blow (65 Vac)
Dissipation:
25 VA peak current Imax = 2 A
Isolating voltage:
1200 Vac
Lightning protection:
Inputs and outputs via isolating transformers
Connections:
terminals for a wire size of up to 12 AWG thread
Relay outputs (option):
relay for high and low alarm from field instrument, a test and a fail relay.
Fall-back (option):
1 relay
Contact rating:
250 Vac max, 3 A, max. 500 VA, single pole double throw.
Instruction manual 878 Panel Indicator
Page 23
Appendix
Display
Type of display:
supertwist LCD with LED back-light
4 lines x 20 characters
character size 2.95 x 4.75 mm (0.12 x 0.2 inch), 5 x 8 dots
Display data:
User selectable, level, water level, temperature, servo density, observed
density, alarm status and operational messages.
Function keys:
8 membrane keys in front panel for: repeatability test, lock test, block, unlock a
gauge, water measurement, water dip, density dip, combined dip, display test,
select, cursor control and enter.
Indication lights:
LA,
HA,
Test,
Fail,
RXD,
TXD,
6 LEDs indicating:
low level alarm
high level alarm
test relay activated
fail alarm relay activated
receive data
transmit data
Data transmission
Protocol:
Enraf-GPU
Type of communication:
Enraf bi-phase mark, half duplex.
Baudrate:
1200/2400 baud.
Field wiring:
EN-bus or with fall-back option individual connection to gauge.
Number of conductors:
2 conductors, (twisted pair)
Cable resistance:
200 Ω per conductor max.
Cable capacitance:
1µF max.
Hardware
Printed circuit boards:
IPS and IPU
Environment
Protection type:
IP20 (indoor use)
Ambient temp. range:
-10 °C to +60 °C (- 26 °F to +140 °F).
Storage temp. range:
-50 °C to +85 °C (- 58 °F to +185 °F).
Page 24
Instruction manual 878 Panel Indicator
Appendix
Appendix C
Window selection
The windows enabled in menu 8 are shown when pressing the SELECT key.
Selection is done using the 5 6 keys and confirmed by pressing ENTER.
Level & temperature small window
-------
: user definable string
llllllllll
: level
mmm
: level dimension
m
ft
in
/16
!!!
menu 13
menu 4
millimetres
feet
inches
fractions
invalid level
aa : level alarm status
TOlevel time-out
TOlevel time-out
FF alarm data error or level data error
MLmotor limit switch
BL displacer blocked
HAhigh level alarm
LA low level alarm
-- no alarm
? as
unknown alarm status
ee : level status
: refresh data indicator
ttttttt
: temperature
uu : temperature dim.
TO
FF
!!
!!
!!
!!
!!
°C
°F
? ts
cccc
F1 F2
O2
C2
O1
C1
menu 4
temperature time-out
temperature failure
limit switch open
servo error
displacer blocked
gauge in lock test
gauge in test
valid temperature
valid temperature
unknown temperature status
: contact status
failure in external hardware
contact 2 open
contact 2 closed
contact 1 open
contact 1 closed
TOlevel time-out
FF invalid level data
MLmotor limit switch reached
BL displacer blocked
LT gauge in lock test
TE gauge in test
WL
water level found
DW
searching for water
SDscan density
-- valid level
? ls
unknown level status
Message line
TGtest
LT lock test
BL block
UN
unlock
For additional messages refer to appendix E
Instruction manual 878 Panel Indicator
Page 25
Appendix
Level (temperature) large window
aa : level alarm status
: level
millimetres
feet
inches
fractions
invalid level
TOtime-out
FL
alarm data error or level data error
ML
motor limit switch reached
BL
displacer blocked
HA
high level alarm
LA
low level alarm
-no alarm
? as
unknown alarm status
: refresh data indicator
ee : level status
ttttttt
: temperature
TOtime-out
FL
invalid data
ML
motor limit switch reached
BL
displacer blocked
LT
gauge in lock test
TE
gauge in test
WL
water level found
DW
searching for water
SD
scan density
-valid level
? ls
unknown level status
mmm
m
ft
in
/16
!!!
: level dimension
menu 4
uu : temperature dimension menu 4
TO
FF
!!
!!
!!
!!
!!
°C
°F
? ts
cccc
F1 F2
O2
C2
O1
C1
Page 26
temperature time-out
temperature failure
limit switch open
servo error
displacer blocked
gauge in lock test
gauge in test
valid temperature
valid temperature
unknown temperature status
For additional messages refer to appendix E
: contact status
failure in external hardware
contact 2 open
contact 2 closed
contact 1 open
contact 1 closed
Instruction manual 878 Panel Indicator
Appendix
Water window
-------
: user definable string
: refresh data indicator
llllllllll
: water level
mmm
: level dimension
m
ft
in
/16
!!!
ww
menu 14
Message line:
W_M
W_D
UN
menu 4
water measurement
water dip
unlock
For additional messages refer to appendix E
millimetres
feet
inches
fractions
invalid level
: water status
FL
ML
BL
LT
SD
TE
DW
NM
-NR
LV
general fail/ initial setting
motor limit switch reached
displacer blocked
gauge in lock test
density scan active
gauge in test
searching for water (downwards)
water level not found
water found
measurement not ready
last valid level
Legend
·
Initial after startup dashes are displayed in the water window as the 878 panel indicator does not request
water. This will only be done after starting a water measurement or a water dip.
·
After starting a water measurement/dip the 878 panel indicator will display temporarily the displacer level.
The dimension will be set to !!!
·
As soon as a valid water level is found the dimension field will display the selected dimension (menu 4).
·
When a water measurement is cancelled (via an Unlock) the last valid water level will be displayed
together with an LV (last valid) indication.
·
When starting a new water measurement/dip the water level field will be set to dashes, the dimension to
!!! and the status to 'NR'.
Instruction manual 878 Panel Indicator
Page 27
Appendix
Servo density window
-------
: user definable string
menu 14
pp : servo density type
IP
TP
interface profile
measurement
tank profile measurement
ss : servo density status
FL
OF
UF
NM
NR
--
general fail/initial setting
conversion overflow
conversion underflow
no measuring point or out of range
measurement not completed
valid density
dddddddd
: density value
qqqqqqqq
: density dimension
kg/m
°API
lbs/cuft
Message line:
D_D
density dip
C_D
combined dip
(water & density)
UN
unlock
For additional messages refer to appendix E
: refresh data indicator
Legend
·
Initial after start-up dashes are displayed in the density window as no measurement data are available.
The dimension will be set to !!!
·
As soon as a valid density has been retrieved the dimension field will display the selected dimension
(menu 4).
·
When starting a new density measurement the density field will be set to dashes, the dimension to !!! and
the status to 'NR'.
Page 28
Instruction manual 878 Panel Indicator
Appendix
Observed density window
-------
: user definable string
: refresh data indicator
dddddddd
: density value
qqqqqqqq
: density dimension
3
kg/m
°API
lbs/cuft
menu 14
oo : observed density status
FL
OR
TR
M?
L?
DH
DL
--
general fail/initial setting
pressure out of range
exceeding trip pressure
manual value used
last valid value used
density high alarm
density low alarm
valid density
For additional messages refer to appendix E
Legend
• As soon as a valid density has been retrieved (item QQ) the dimension field will display the selected
dimension (menu 4).
• In case of a non valid measured value the dimension will be replaced by !!!!!!!
Messages
The bottom line of the display window is used to display a range of messages.
These messages are displayed for approximately 2 seconds.
878 panel indicator waiting for data
Level data time-out
Temperature time-out
Display data time-out
Xmission time-out
Observed density time-out
No gauge answer
Fall-back relay error
TEST executed
LOCKTEST executed
BLOCK executed
UNLOCK executed
WATER MEAS. executed
Water DIP executed
DENSITY DIP executed
COMBINED DIP exec.
W_M active
D_D active
W_D active
C_D active
Command not allowed
Key has no function
Instruction manual 878 Panel Indicator
Page 29
Appendix
Appendix D
Service functions
Service data can be retrieved from the indicator using a combination of keys (pressing them all simultaneously).
Service data 1
Push DISPLAY TEST + Select
Service data 2
Push DISPLAY TEST + 6
Push DISPLAY TEST to exit service data 1 & 2.
Indicator reset
A software reset is initiated by simultaneously pressing the keys
DISPLAY TEST + 6 + ENTER
Page 30
Instruction manual 878 Panel Indicator
Appendix
Appendix E
Error display screen
AAA
BBBBBBBBBBBBBBBBBBBBBBBBBBB
000
USER reset
002
EPROM BCC error
004
LCD ram error
005
Watchdog error
006
External RAM error
007
NOVRAM EEPROM
008
NOVRAM RAM error
009
NOVRAM overall BCC
error
010
NOVRAM Device number
error
011
NOVRAM version
error
016
NOVRAM data error
030
LCD busy flag
037
LCD write error
101
Watchdog reset
102
Software generated
reset
140
Fall-back relay
error
141
Test relay error
142
Low alarm relay
error
143
High alarm relay
error
144
Indicator fail relay
error
145
PET transmission
circuit error
146
PET receive circuit
error
998
end of ROM reached
error
999
general software
error
Instruction manual 878 Panel Indicator
CCCCCCCCCCCCCCCCC
error
time-out
Page 31
Appendix
Appendix F
Pos. nr.
Recommended spare parts
Description
Part number
1
EPROM, programmed
0181.204
2
Printed circuit board IPU without alarm relays
0878.606
3
Printed circuit board IPU including alarm relays and connector
0878.604
4
Printed circuit board IPS 110, 130, 220 or 240 Vac
0878.605
5
Printed circuit board IPS 65 Vac
0878.603
6
Display assembly
0878.620
7
3 pins cable connector (female)
2523.956
8
4 pins cable connector (female)
2523.958
9
12 pins cable connector (female)
2523.960
10
Keyboard assembly
2601.451
11
Fall-back relay 2655.175
2620.752
12
Fuse 315 mA T slow blow for 110 / 130 Vac
2655.170
13
Fuse 630 mA T slow blow for 220 / 240 Vac
2655.173
14
Fuse 1 A T for 65 Vac
2655.175
Page 32
Instruction manual 878 Panel Indicator
Appendix
Appendix G
Host communication
Record structure
The GPU protocol is used for data communication with the 878 panel indicator, based on a record structure.
A record is the largest independent block of data that is communicated over the transmission lines.
The various sorts of records are characterized by a letter: A to Z.
The basic structure of a record is as follows:
STX
Address NN
TOI
TOR
DATA
ETX
BCC
A record consists of a data field surrounded by an envelope. The envelope allows the receiver to detect the
incoming record and to verify its proper reception.
The envelope consists of:
STX (start of transmission)
ETX (end of transmission)
BCC (block check character)
The data field consists of:
Transmission address of the field instrument
TOI (type of instrument)
TOR (type of record)
Data byte(s), (depending of the type of record)
For further information see the protocol manuals of the field instruments.
Record interpretation
Transmission address NN
The transmission address NN identifies the address of the Honeywell Enraf field instrument. The 878 panel
indicator offers the possibility to program individual addresses for level, interface level, temperature, servo and
observed density. These addresses can be selected in menu 1.
Example:
In case of an 854 with temperature and an 877 HIMS data can be retrieved as follows:
The address TA from the 854 can be used to retrieve level and interface level and temperature.
The address TA from the 877 HIMS can be used to retrieve observed density.
Type of instrument TOI
The type of instrument (TOI) as selected in menu 1 can be:
B 811, 854, 872, 873 and 877
C 813, 872, 873 and 877
· E 811 with external contacts
Instruction manual 878 Panel Indicator
Page 33
Appendix
Type of record TOR
The TOR can be a data request or answer message or an operational command.
The 878 panel indicator captures or requests only information from the following records:
B
C
L
W
Z
level
temperature
level in 0.1 mm
search for water level
in case of Z records (items SC, DZ, EZ, SD, TP and QQ only).
In case of operational commands the 878 panel indicator listens or requests information from the commands
listed in
Data
The data field is always used in case of an answer record. The length depends on the TOR.
If the TOR is a Z, the datafield commences always with an Item, identified with its two characters abbreviation.
Record transmission
Records are only transmitted in stand alone and fall-back modes.
Pushing the key under the soft-label in the display, the 878 panel indicator generates one of the following
records.
Soft-label
display line 4
Description
TOR
TG
Test gauge
T
LT
Lock test
O
BL
Block
N
UN
Unlock
U
WM
Water measurement
W
UN
Quit water measurement & water/density combined
U
WD
Water dip
W
DD
Density dip
SC
CD
Combined dip
Page 34
Instruction manual 878 Panel Indicator
W/SC
Appendix
Z-record
The Z-record allows access to items used to program or to retrieve data from field instruments such as the 854,
872, 877, etc. If Z-records are used the TOR is always a Z. The data field (request & answer) contains always a
2 character abbreviation (ITEM).
The 878 panel indicator makes use of the following Z-records:
SCservo density
QQ
to retrieve the servo density from the 854
observed density to retrieve observed density from a HIMS or HTG field
instrument
DZ
density profile stop
this is the lowest density measurement level programmed in the 854.
The 878 panel indicator retrieves this value and down line loads this value into
item EZ.
DZ should always be programmed in such a way that it is above the water level in the tank. This Item must be
programmed in the 854.
EZ density profile stop
the density stop level.
this item is used by the computer system or the 878 panel indicator to down line load
SDscan direction
this item specifies whether the tank density profile measurement is started from the
product surface downwards or from the bottom upwards.
TP tank profile density scan
this command starts a density profile measurement.
Instruction manual 878 Panel Indicator
Page 35
Appendix
Appendix H
Page 36
ASCII table
Instruction manual 878 Panel Indicator
Index
Index
Alarm
contact.............................................................. 5, 11
high level .................................................... 5, 15, 19
low level ..................................................... 5, 15, 19
Caution................................................................... 3
Command
block....................................................................... 6
lock......................................................................... 6
test ......................................................................... 6
unlock..................................................................... 6
Connector
CN1 ...................................................................... 10
Data...................................................................... 33
Density
dip .......................................................................... 6
measurement ......................................................... 6
observed ................................................ 5, 6, 17, 34
profile stop............................................................ 34
servo .......................................................... 5, 17, 34
Display
contrast ................................................................ 14
time-out ................................................................ 17
window ................................................................. 14
Honeywell Enraf fieldbus.............................. 5, 7, 18
EPROM ................................................................ 12
Error
code ....................................................................... 7
display screen ...................................................... 30
Fail
contacts................................................................ 11
relay ..................................................................... 19
Fuse
primary ................................................................. 10
secondary............................................................. 10
Gauge address....................................................... 5
HIMS ...................................................................... 6
HTG........................................................................ 6
Identification code .................................................. 8
Indicator reset ...................................................... 29
Interface
dip .......................................................................... 6
measurement ......................................................... 6
Jumper protection................................................. 15
Key
display test ........................................................... 14
enter ..................................................................... 14
select.................................................................... 14
Keyboard.............................................................. 14
Large display ........................................................ 18
LCD .................................................................. 5, 14
LED
fail............................................................................15
HA ...........................................................................15
LA ............................................................................15
RXD.........................................................................15
test...........................................................................15
TXD .........................................................................15
Locking
screw .......................................................................10
spring.........................................................................9
Mains voltage ..........................................................10
Menu
address....................................................................17
dimensions ..............................................................17
field commands .......................................................19
level (water scan) ....................................................19
operational mode.....................................................18
relay settings ...........................................................19
tank identifier ...........................................................20
time-out settings ......................................................17
window names.........................................................20
window selection .....................................................18
Messages ................................................................28
Mounting brackets .....................................................8
Note...........................................................................3
NOVRAM.................................................5, 12, 13, 19
Operational mode
fall-back .........................................................7, 17, 18
listen ....................................................................7, 18
stand alone..........................................................7, 18
PCB-board...............................................................10
Product
interface level ............................................................5
level ...........................................................................5
Record
B 17
B/L ...........................................................................17
interpretation ...........................................................32
L 17
structure ..................................................................32
transmission ............................................................33
Service
data 1 ......................................................................29
data 2 ......................................................................29
functions ..................................................................29
Set-up menu ............................................................15
Soft-keys .............................................................5, 14
Software update ......................................................12
Spare parts ..............................................................31
Instruction manual 878 Panel Indicator
Page 37
Index
Specifications
data transmission ...................................................... 23
display ....................................................................... 23
electrical .................................................................... 22
environment............................................................... 23
general ...................................................................... 22
hardware ................................................................... 23
mechanical ................................................................ 22
Tank Profile ................................................................. 6
Temperature................................................................ 5
Test
contacts ..................................................................... 11
relay........................................................................... 19
TOI ...................................................................... 17, 32
TOR..................................................................... 19, 33
Transmission
address...................................................................... 32
time-out ..................................................................... 17
Warning ....................................................................... 3
Water measurement.................................................... 6
Weights and Measures...................................... 7, 9, 17
Window
density ......................................................................... 6
level (temperature) .................................... 6, 13, 24, 25
observed density ....................................................... 28
servo density ............................................................. 27
start-up ...................................................................... 13
water interface....................................................... 6, 26
Z-record..................................................................... 34
Page 38
Instruction manual 878 Panel Indicator
Notes
Instruction manual 878 Panel Indicator
Page 39
Notes
Page 40
Instruction manual 878 Panel Indicator
Honeywell Enraf
Delftechpark 39
2628 XJ Delft
The Netherlands
Tel: +31 (0)15-2701 100
Email: enraf-nl@honeywell.com
www.honeywellenraf.com
4416263 - Revision 2
January 2010
© 2010 Honeywell International Inc.