Instruction
Manual
Communication Manual
for ACB OCR High Class
www.vitzroem.com
Communication Manual
for ACB OCR High Class
3
Thank you for purchasing ACB OCR.
▶ Please read the safety precautions before using the product, and comply
with all user instructions.
▶ Please read the instruction manual carefully before using ACB OCR safely.
Safety Precautions
Warning
▶Violating the following instructions may result in grievous bodily harm
or death.
● Never inspect or install alone.
● Do not install or operate with wet hands.
● Do not use cables with damaged sheath.
● Do not disassemble the product.
● Always wear protective equipment to test.
● Attach a safety warning plate before working.
Note
▶ Violating the following instructions may result in light bodily harm or
physical damage to products.
● Precautions for installation and terminal wiring
- Apply power suitable for the rating to the product power terminal.
- Do not leave screws, metal, water, oil, etc. in the product.
● Storage and Handling precautions
- Store in a place free from moisture and dust.
- Do not throw or apply excessive force to move the product as it may
cause damage.
● Disposal Precautions
- Dispose of the product as industrial waste.
4
The warranty for the original purchaser who purchased the
product from VITZRO is as follows:
▶ Warranty Conditions
Products are covered by a two-year customer warranty. Customers can
receive support from VITZRO products if a problem or malfunction occurs
to them within the warranty period.
▶ V ITZRO EM will not cover any damages caused under the
following circumstances even if the warranty is still in effect:
The user has failed to comply with the installation instructions (rated
power, CT, PT, DI, DO, or communication), power restrictions, PT/CT, or
digital input/output ratings stipulated in the Instruction Manual.
Product has been damaged due to external artificial factors, or
environmental factors where the product has been installed.
▶ Released version of the Portable OCR Tester Instruction
Manual is as follows:
Document revised due to communication function improvements
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5
Table of Contents
6
01 Product Features
07
02 Modbus Communication Protocol
08
03 Communication Map
11
04 Examples
16
05 VICOM Manager
19
1. Product Features
●
CB OCR is a controller that is attached to the front of ACB, which detects
A
system failure and gives commands for ACB operation.
●
ince ACB OCR sold by VITRO is applied with MODBUS industrial protocol,
S
various additional services can be supported.
●
S485 port on the top of ACB provides communication function and
R
supports various additional services such as relay element, measurement
and fault events. You can download the information to PC (Master) and
analyze it. (ACB OCR is a slave product.)
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7
2. Modbus Communication Protocol
2. 1 Introduction
Modbus is a serial communication protocol for Programmable Logic Controllers (PLCs)
proposed by Modicon in 1979. Because it is simple and reliable, it has been widely used to
date and is a de facto standard protocol.
◆ Advantages of Modbus
● Developed for industrial applications.
● Free as an open protocol
● Easy to develop and manage
● Information transferred in bits or words.
2. 2 Physical Layer
● Communication Port: RS485
● Asynchronous Format: 8-bit
● Binary and a bit order of No Parity
Without Parity Checking
Start
1
2
3
4
5
6
7
8
Stop
● Master-Slave type: Master can only make queries, and the Slave responds appropriately
to the queries from the Master.
8
2. 3 Data Link Layer (Communication Frame)
When the Master sends a Query frame to the Slave, the Slave sends a corresponding
Response frame, and each frame is distinguished by the Dead Time. The following shows
the general format of a Query frame and a Response frame.
Description
Slave Address
Function Code
Data
CRC
Dead time
Size
1 byte
1 byte
N * 8 bytes
2 bytes
3.5 bytes Transmission
time
Query
Master
Response
Slave address
Device
Address
Device
Address
Own Address
Definition of a Slave
Action
Function Code
Function Code
Echo or MSB=1
Slave
Additional
information
required for the
slave to perform the
requested action
Data
Data
The requested data
or Exception Code
CRC
Error check
Error check
CRC
● Slave address
▶ If the Slave device address field of the Query frame sent by the Master to the Slave is 0,
it means the Master device broadcasts to all Slaves.
▶ When the Master makes a Query to the Slave, the Slave address is written in the
address field to transmit.
▶ When the Slave sends a response frame to the Master, its address is written in the
address field to transmit.
▶ Effective address range of Slave device: 1 - 31
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9
● Function Code (hereinafter referred to as FC)
▶ FC refers to the definition of actions of the Slave required by the Master.
▶ Slave fills in the following information:
- For Normal Response: The FC value of Query is echoed as it is.
- For Exception Response: The MSB of the FC value of Query is set to 1.
(ex) If Master requests FC 0x01 and it is an Exception, FC 0x81 is sent.
▶Effective Range
● DATA
▶ DATA contains the following information:
- Register address
- Number of items to handle
- Number of bytes of actual data
- Please refer to the Chapter 3 Communication Map for details
● CRC
▶ Cyclic Redundancy Check (CRC) is a method of determining a check value to find out
whether there is an error in the transmitted data.
▶ CRC of Modbus communication is applied with CRC-16 method.
10
3. Communication Map
2. 3 Data Link Layer (Communication Frame)
● Communication Notes
Because ACB OCR communicates in block units, unit call is rejected.
● Since some communication addresses in the communication map are applied from OCR
F/W version 1.9, check the firmware version of the product.
(You can check it in all OCR Highclass v1.0 or higher versions unless otherwise noted.)
Function
Code
Name
Contents
DO
Status
0x01
Read
Coil
Status
Output
Status
Adress POINT Format Properties
Setting
Unit
Remarks
0
1
0
1
DO2
1
1
0
1
DO3
2
1
0
1
DO4
3
1
0
1
Reserved
4
1
0
1
Reserved
5
1
0
1
Reserved
6
1
0
1
Reserved
7
1
0
1
LTD Trip Status
8
1
0
1
1 on LTD Trip
STD Trip Status
9
1
0
1
1 on STD Trip
INST Trip Status
10
1
0
1
1 on INST Trip
GFT Trip Status
11
1
0
1
1 on GFT Trip
PTA Alarm Status
12
1
0
1
1 on PTA Alarm
MTD Output
13
1
0
1
1 on MTD output
Reserved
14
1
0
1
Reserved
15
1
0
1
0
1
0
0
1
1
0
6300
2
1
0
0
LTD set time
Read
Holding
Registers
Max
DO1
LTD set current
0x03
Min
uint8
uint32
uint32
3
1
4
1
STD set current
uint32
5
1
6
1
STD set time
uint32
7
1
8
1
INST set current
Pre-alarm set
current
uint8
9
1
10
1
11
1
R
R
R
R
50
300
0
0
R
0
20050
0
0
R
uint32
R
uint32
R
50
401
0
94500
0
0
0
6300
A
Shown as scaled
current value (A)
according to rating
ms
LTD operating time
(msec, @ Ir 600%)
Reference time
(50, 100, 200, 400,
800, 1200, 1600,
2000)
Unit: ms
A
Shown as scaled
current value (A)
according to rating
ms
If STD operating
time (msec) * I2t is
on, LSB is set to 1.
A
Shown as scaled
current value (A)
according to rating
OCR F/W
Version
V1.9 or
higher
A
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11
Function
Code
Name
Contents
Pre-alarm set
time
Setting
Adress POINT Format Properties
12
1
13
1
14
1
GFT set current
15
1
16
1
GFT set time
System
0x03
Read
Holding
Registers
uint32
R
17
1
Rated Frequency
22
1
uint16
Rated current
23
1
Number of Poles
24
MCR/INST
Max
0
0
0
180
0
0
0
6300
0
0
R
Remarks
OCR F/W
Version
A
Shown as scaled
current value (A)
according to rating
Basically
supported
ms
If GFT operating
time (msec) * I2t is
on, LSB is set to 1.
Unit
s
50
410
R
50
60
Hz
Read Only (factory
setting: do not
tamper.)
uint16
R
80
6300
A
Read Only (factory
setting: do not
tamper.)
1
uint16
R
3
4
pole
Read Only (factory
setting: do not
tamper.)
25
1
uint16
R
0
(INST)
1
(MCR)
Communication
speed
26
1
uint16
R
9600
38400
Communication
ID
27
1
uint16
R
1
31
F/W Version
28
1
uint16
R
0
9999
System Time –
Year
29
1
uint16
R/W
2021
2099
FC0x10 support
System Time Month
30
1
uint16
R/W
1
12
FC0x10 support
System Time –
Day
31
1
uint16
R/W
1
31
FC0x10 support
System Time Time
32
1
uint16
R/W
0
23
FC0x10 support
System Time –
Minute
33
1
uint16
R/W
0
59
FC0x10 support
System Time –
Second
34
1
uint16
R/W
0
59
FC0x10 support
Fault Event
#1 (If the
corresponding
event area is
empty, it is filled
with 0xff).
42
44
46
12
R
uint32
40
Fault
Event
uint32
Min
2
2
2
2
uint32
uint32
uint32
uint32
R
R
R
R
0
0
0
0
999999
999999
999999
999999
Read Only (factory
setting: do not
tamper.) 0: INST, 1:
MCR
BPS
Read Only, 9600,
19200, 38400 can
be set in Device
Read Only, 1 - 31
can be set in Device
/10
V1. 9 or
higher
Read Only, 10 ->
1.0 Version
A
Fault Current Phase R (R-phase
current (A) at fault
scaled according to
the rating)
A
Fault Current Phase S (S-phase
current (A) at fault
scaled according to
the rating)
A
Fault Current Phase T (T-phase
current (A) at fault
scaled according to
the rating)
A
Fault Current Phase N (N-phase
current (A) at fault
scaled according to
the rating)
Basically
supported
Function
Code
Name
Contents
Adress POINT Format Properties
48
Fault Event
#1 (If the
corresponding
event area is
empty, it is filled
with 0xff).
0x03
Read
Holding
Registers
Fault
Event
Fault Event
#2 (If the
corresponding
event area is
empty, it is filled
with 0xff).
Fault Event
#3 (If the
corresponding
event area is
empty, it is filled
with 0xff).
Fault Event
#4 (If the
corresponding
event area is
empty, it is filled
with 0xff).
2
unit32
R
Min
Max
Unit
Remarks
0
999999
A
Fault Current - GFT
(GFT-phase current
(A) at fault scaled
according to the
rating)
0
OCR F/W
Version
Fault Current ELT-phase current
(mA) at fault scaled
according to the
ELT rating
50
2
unit32
R
999999
52
1
unit16
R
Event Year/Month
(H nibble = Year,
L nibble = Month)
53
1
unit16
R
Event Date/
Hour(H = Date,
L = Hour)
54
1
unit16
R
Event min./sec.
(H = min., L = sec)
55
1
unit16
R
56
2
unit32
R
0
999999
A
58
2
uint32
R
0
999999
A
60
2
uint32
R
0
999999
A
62
2
uint32
R
0
999999
A
64
2
uint32
R
0
999999
A
66
2
uint32
R
0
999999
A
68
2
uint32
R
0
999999
A
70
1
uint16
R
71
1
uint16
R
72
1
uint16
R
73
1
uint16
R
74
2
uint32
R
0
999999
A
76
2
uint32
R
0
999999
A
78
2
uint32
R
0
999999
A
80
2
uint32
R
0
999999
A
82
2
uint32
R
0
999999
A
84
2
uint32
R
0
999999
A
86
2
uint32
R
0
999999
A
88
1
uint16
R
89
1
uint16
R
90
1
uint16
R
91
1
uint16
R
92
2
uint32
R
0
999999
A
94
2
uint32
R
0
999999
A
96
2
uint32
R
0
999999
A
98
2
uint32
R
0
999999
A
100
2
uint32
R
0
999999
A
102
2
uint32
R
0
999999
A
104
2
uint32
R
0
999999
A
106
2
uint16
R
107
1
uint16
R
108
1
uint16
R
109
1
uint16
R
110
1
uint32
R
0
999999
A
H nibble = Trip type
All the same
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13
Function
Code
Name
Contents
Fault Event
#5 (If the
corresponding
event area is
empty, it is filled
with 0xff).
Fault Event
#6 (If the
corresponding
event area is
empty, it is filled
with 0xff).
0x03
Read
Holding
Registers
Fault
Event
Fault Event
#7 (If the
corresponding
event area is
empty, it is filled
with 0xff).
Fault Event
#8 (If the
corresponding
event area is
empty, it is filled
with 0xff).
14
Adress POINT Format Properties
Min
Max
Unit
112
2
uint32
R
0
999999
A
114
2
uint32
R
0
999999
A
116
2
uint32
R
0
999999
A
118
2
uint32
R
0
999999
A
120
2
uint32
R
0
999999
A
122
2
uint32
R
0
999999
A
124
1
uint16
R
125
1
uint16
R
126
1
uint16
R
127
1
uint16
R
128
2
uint32
R
0
999999
A
130
2
uint32
R
0
999999
A
132
2
uint32
R
0
999999
A
134
2
uint32
R
0
999999
A
136
2
uint32
R
0
999999
A
138
2
uint32
R
0
999999
A
140
2
uint32
R
0
999999
A
142
1
uint16
R
143
1
uint16
R
144
1
uint16
R
145
1
uint16
R
146
2
uint32
R
0
999999
A
148
2
uint32
R
0
999999
A
150
2
uint32
R
0
999999
A
152
2
uint32
R
0
999999
A
154
2
uint32
R
0
999999
A
156
2
uint32
R
0
999999
A
158
2
uint32
R
0
999999
A
160
1
uint16
R
161
1
uint16
R
162
1
uint16
R
163
1
uint16
R
164
2
uint32
R
0
999999
A
166
2
uint32
R
0
999999
A
168
2
uint32
R
0
999999
A
170
2
uint32
R
0
999999
A
172
2
uint32
R
0
999999
A
174
2
uint32
R
0
999999
A
176
2
uint32
R
0
999999
A
178
1
uint16
R
179
1
uint16
R
180
1
uint16
R
181
1
uint16
R
182
2
uint32
R
0
999999
A
Remarks
OCR F/W
Version
Function
Code
Name
Contents
0x03
0x10
uint32
R
0
999999
A
2
uint32
R
0
999999
A
188
2
uint32
R
0
999999
A
190
2
uint32
R
0
999999
A
192
2
uint32
R
0
999999
A
194
2
uint32
R
0
999999
A
196
1
uint16
R
197
1
uint16
R
198
1
uint16
R
199
1
uint16
R
200
2
uint32
R
0
999999
A
202
2
uint32
R
0
999999
A
204
2
uint32
R
0
999999
A
206
2
uint32
R
0
999999
A
208
2
uint32
R
0
999999
A
210
2
uint32
R
0
999999
A
212
2
uint32
R
0
999999
A
214
1
uint16
R
215
1
uint16
R
216
1
uint16
R
217
1
uint16
R
218
2
uint32
R
0
999999
A
System Time –
Year
29
1
uint16
W
2021
2099
System Time Month
30
1
uint16
W
1
12
System Time –
Day
31
1
uint16
W
1
31
System Time Time
32
1
uint16
W
0
23
System Time –
Minute
33
1
uint16
W
0
59
System Time –
Second
34
1
uint16
W
0
59
Current Phase R
Current Phase S
0x04
Unit
2
Fault
Event
System
Max
186
Fault Event
#10 (If the
corresponding
event area is
empty, it is filled
with 0xff).
Preset
Multiple
Registers
4x
references
Min
184
Fault Event
#9 (If the
corresponding
event area is
empty, it is filled
with 0xff).
Read
Holding
Registers
Adress POINT Format Properties
Read
Input
Registers Measuring
3x
references
Current Phase T
Current Phase N
0
2
4
6
uint32
uint32
uint32
uint32
Remarks
OCR F/W
Version
V1. 9 or
higher
R
Shown as
scaled R-phase
current value
(A) according to
rating
R
Shown as
scaled S-phase
current value
(A) according to
rating
R
Shown as
scaled T-phase
current value
(A) according to
rating
R
Shown as
scaled N-phase
current value
(A) according to
rating
Basically
supported
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15
4. Examples
● FC03 Read Holding Registers
▶ Example of Query/Response to read registers 0000 ~ 0001 from Slave device 1
▶ LTD set current request (LTD set current is over 2000A):
Query
Response
Field Name
(Hex)
Field Name
(Hex)
Slave Address
0x01
Slave Address
0x01
Function Code
0x03
Function Code
0x03
Starting Address Hi
0x00
Byte Count
0x04
Starting Address Lo
0x00
LTD Setting Current Hi
0x00
Quantity of Inputs Hi
0x00
LTD Setting Current Hi
0x00
Quantity of Inputs Lo
0x02
LTD Setting Current Lo
0x07
CRC Lo
0xc4
LTD Setting Current Lo
0xd0
CRC Hi
0x0b
CRC Lo
0xf9
CRC Hi
0x9f
Master
16
Slave
▶ Example of Query/Response to read registers 0040 ~ 0057 from Slave device 1
▶ Fault current-0 [A], Event Time - July 23, 15: 46: 53, Trip - LTD (1), Phase - Fault Test
(6), Max Phase current - 0 [A]
Query
Field Name
(Hex)
Slave Address
0x01
Function Code
Starting Address Hi
Master
Response
Starting Address Lo
Quantity of Inputs Hi
Quantity of Inputs Lo
CRC Lo
CRC Hi
0x03
0x00
0x28
0x00
0x12
0x45
0xcf
Field Name
(Hex)
Slave Address
0x01
Function Code
0x03
Byte Count
0x24
PhaseR Fault Current Hi
0x00
PhaseR Fault Current Hi
0x00
PhaseR Fault Current Lo
0x00
PhaseR Fault Current Lo
0x00
PhaseS Fault Current Hi
0x00
PhaseS Fault Current Hi
0x00
PhaseS Fault Current Lo
0x00
PhaseS Fault Current Lo
0x00
PhaseT Fault Current Hi
0x00
PhaseT Fault Current Hi
0x00
PhaseT Fault Current Lo
0x00
PhaseT Fault Current Lo
0x00
PhaseN Fault Current Hi
0x00
PhaseN Fault Current Hi
0x00
PhaseN Fault Current Lo
0x00
PhaseN Fault Current Lo
0x00
GFT Fault Current Hi
0x00
GFT Fault Current Hi
0x00
GFT Fault Current Lo
0x00
GFT Fault Current Lo
0x00
ELT Fault Current Hi
0x00
ELT Fault Current Hi
0x00
ELT Fault Current Lo
0x00
ELT Fault Current Lo
0x00
Year
0x0f
Month
0x07
Date
0x17
Hour
0x0f
Minute
0x2e
Second
0x35
Trip Type
0x01
Phase
0x06
Max Phase Fault Current Hi
0x00
Max Phase Fault Current Hi
0x00
Max Phase Fault Current Lo
0x00
Max Phase Fault Current Lo
0x00
CRC Lo
0xf7
CRC Hi
0x10
Slave
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17
● FC03 Read Holding Registers
▶ Example of Query/Response to read registers 0000 ~ 0007 from Slave device 1
▶ R, S, T, N-phase current measuring information:
Query
Response
Field Name
(Hex)
Slave Address
0x01
Function Code
0x04
Starting Address Hi
0x00
Master
Starting Address Lo
0x00
Quantity of Inputs Hi
0x00
Quantity of Inputs Lo
0x08
CRC Lo
CRC Hi
0x45
0xcf
Field Name
(Hex)
Slave Address
0x01
Function Code
0x04
Byte Count
0x10
PhaseR Current Hi
0x00
PhaseR Current Hi
0x00
PhaseR Current Lo
0x00
PhaseR Current Lo
0x00
PhaseS Current Hi
0x00
PhaseS Current Hi
0x00
PhaseS Current Lo
0x00
PhaseS Current Lo
0x00
PhaseT Current Hi
0x00
PhaseT Current Hi
0x00
PhaseT Current Lo
0x00
PhaseT Current Lo
0x00
PhaseN Current Hi
0x00
PhaseN Current Hi
0x00
PhaseN Current Lo
0x00
Slave
0x00
CRC Lo
0xf7
CRC Hi
0x10
Slave
Note
Adjust all communication data length, byte numbers, in a single data or block unit
according to the communication map rules.
Requesting excessively long data or ignoring communication map rules may cause
communication errors.
18
5. VICOM Manager
5.1 Downloading VICOM Manager
● You can download VICOM Manager from the SW Management and Operation page of
the VITZRO EM website (http://vitzroem.com).
5. 2 Installing VICOM Manager
● Refer to the SW Management and Operation Manual for installation of VICOM Manager.
5. 3 Using VICOM Manager
● For more information, see VICOM Manager.
● In VICOM Manager, you can check the following items of ACB OCR.
● Measuring Information
● Status
▶ Settings
▶ Information
▶ Events (Faults)
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◆ Measuring Information
● The measuring information screen is shown below.
● You can check the measuring values of R, S, T, N - phase.
◆ Status
● In the Status, you can check the trip information of each relay element and the DO
output of the ACB terminal block.
● Below is a screen example for INST operation.
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◆ Settings
● In Settings, you can remotely check and change the time settings of ACB OCR.
● The time is the set time on the PC.
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◆ Information
● In the Information, you can check the system (rating) and relay element setting of
ACB OCR.
● You can check items below in the system tab.
● The items you can check in overcurrent (relay element) tab are as follows:
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ACB OCR High Class Communication
Headquarters and Plant
Seoul office
Busan office
Honam Office
Service Center
327, Byeolmang-ro, Danwon-gu, Ansan-city, Gyeonggi-do
VITZRO Bldg, 7, 25-gil Neungdong-ro, Gwangjin-gu, Seoul, Korea
3-109, 37 Industrial Goods Shopping Center, Gwaegam-ro, Sasang-gu, Busan, Korea
87, 170-gil Cheomdanjungang-ro, Gwangsan-gu, Gwangju
327, Byeolmang-ro, Danwon-gu, Ansan-city, Gyeonggi-do
* This Instruction Manual is available on VITZRO EM’s website.
* This manual can be changed without prior notice to improve the product's performance.
* In the event of any problems or inconveniences related to our products, please contact VITZRO EM.
2022. 09(K-01)