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CS2 SERIES
–OPERATION MANUAL(EN)-A-2017-11-16
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RS485 MODBUS RTU MODE
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Modbus RTU Mode protocol
1. Function 03H (Read Holding Registers)
Request Data Frame; EX: Read the data of display value(0000H starts from 1 Word)
SLAVE
Address
FUNCTION
Starting
Address Hi
Starting
Address Lo
No. of Word
Hi
No. of Word
Lo
CRC
Lo
CRC
Hi
01H
03H
00H
00H
00H
01H
84H
0AH
Response Data Frame; EX
: The response value is ”0”
SLAVE
Address
FUNCTION
Byte
count
Data
Hi
Data
Lo
CRC
Lo
CRC
Hi
01H
03H
02H
00H
00H
B8H
44H
Request Data Frame (EX: Continue to request the data of 10 points)
SLAVE
Address
FUNCTION
Starting
Address Hi
Starting
Address Lo
No. of Word
Hi
No. of Word
Lo
CRC
Lo
CRC
Hi
01H
03H
00H
00H
00H
0AH
C5H
CDH
Response Data Frame
SLAVE
Address
FUNCTION
Byte
count
Data(1)
Hi
Data(1)
Lo
… … Data(10)
Hi
Data(10)
Lo
CRC
Lo
CRC
Hi
01H
03H
14H
00H
00H
… …
01H
00H
--
--
2. Writing Command by Function 06H (Preset Single Register)
Request Data Frame
SLAVE
Address
FUNCTION
Code
Starting
Address Hi
Starting
Address Lo
Preset
DATA Hi
Preset
DATA Lo
CRC
Lo
CRC
Hi
01H
06H
00H
00H
00H
02H
08H
0BH
Response Data Frame
SLAVE
Address
FUNCTION
Code
Starting
Address Hi
Starting
Address Lo
Preset
DATA Hi
Preset
DATA Lo
CRC
Lo
CRC
Hi
01H
06H
00H
00H
00H
02H
08H
0BH
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ADDRESS TABLE **Address number are Hexadecimal
User level
Name
Address
Range
Explain
Initial
Write/Read Note
PV
0000h
-19999~29999
Present Value
R
ry!sp
0001h
-19999~29999
Relay1 Set Point
10000
R/W
ry@sp
0002h
-19999~29999
Relay2 Set Point
10000
R/W
ry#sp
0003h
-19999~29999
Relay3 Set Point
10000
R/W
ry$sp
0004h
-19999~29999
Relay4 Set Point
10000
R/W
RELAY
STATUS
0005h
0~1
RELAY STATUS
bit0~bit3:
relay1~relay4;
0
=Relay off
1
=Relay on
R/W
ECI
STATUS
0006h
0~1
ECI STATUS
bit0~bit2:
ECI.1~ECI.3;
0
=untriged
1
:triged
R
pVhld
0007h
-19999~29999
PV Hold
R
min
0008h
-19999~29999
The Minimum of PV
0
R
max
0009h
-19999~29999
The Maximum of PV
0
R
SYSTEM
STATUS
000Ah
SYSTEM STATUS
bit0
=1 EEP fail;
bit1
=1 Input calibration fail;
bit2
=1 Input calibration NG;
bit3
=1 Analogue Output calibration fail;
bit4
=1 Analogue Output calibration NG
R
Mrst
000Bh
0~1
Reset Maximum & Minimum Value
0:
No
1:
Yes
0
R/W
rs485
000Ch
-19999~29999
PV showing from RS485 command(data)
0.00%
R/W