7300CV MODBUS COMMUNICATION PROTOCOL
File No. :PC-CV-08
Version : 1.A
Page :
13/34
5.2.4 Analog function block read
ASCII Mode
PC
Æ
INV(PLC) INV(PLC)
Æ
PC
3AH STX
3AH STX
30H
30H
31H
Address
31H
Address
30H
30H
33H
Function Code
33H
Function Code
30H
30H
32H
36H
Data Length
(Byte)
43H
30H
*Register Number
*Send out the data from
2C0H~2C2H, total 12 Byte
30H
?
30H
?
CHECK
SUM,
30H
0DH
END
33H
Data Length
0AH
END
?
?
CHECK SUM
0DH END
0AH END
RTU Mode
PC
Æ
INV(PLC) INV(PLC)
Æ
PC
01H Address
01H Address
03H Function
Code
03H Function
Code
02H
06H Data
length
C0H
*Register Number
00H
**Send out the data from
2C0H~2C2H, total 6 Byte
03H
Data Length
?
CRC High Byte
?
CRC High Byte
?
CRC Low Byte
?
CRC Low Byte