7300CV MODBUS COMMUNICATION PROTOCOL
File No. :PC-CV-08
Version : 1.A
Page :
16/34
6.3 Ladder page write
ASCII Mode
PC
Æ
INV(PLC) INV(PLC)
Æ
PC
3AH
STX
3AH
STX
30H
30H
31H
Address
31H
Address
31H
30H
30H
Function Code
33H
Function Code
30H
30H
32H
32H
30H
30H
30H
*Register Number
30H
*Register
Number
30H
30H
30H
30H
30H
30H
41H
Data Length
(Byte)
41H
Data Length
31H
?
34H
DATA Number
?
CHECK
SUM
0DH
END
*Send out the data from
200H~209H, total 40 Byte
0AH
END
?
?
CHECK SUM
0DH
END
0AH
END
RTU Mode
PC
Æ
INV(PLC) INV(PLC)
Æ
PC
01H Address
01H Address
10H Function
Code
03H Function
Code
02H
02H
00H
* Register Code
00H
* Register Code
00H
00H
0AH
Data Length
0AH
Data Length
14H
DATA Number
?
CRC High Byte
?
CRC Low Byte
*end out the data from 200H~209H,
total 20 Byte
?
CRC High Byte
?
CRC Low Byte