7300CV MODBUS COMMUNICATION PROTOCOL
File No. :PC-CV-08
Version : 1.A
Page :
18/34
6.4.2 Counter function block 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
38H
38H
43H
*Register Number
43H
*Register
Number
30H
30H
30H
30H
30H
30H
33H
Data Length
(Byte)
33H
Data Length
30H
?
36H
DATA Number
?
CHECK
SUM
0DH
END
0AH
END
*Send out the data from
28CH~28EH, total 12 byte
?
?
CHECK SUM
0DH
END
0AH
END
RTU Mode
PC
Æ
INV(PLC) INV(PLC)
Æ
PC
01H Address
01H Address
10H Function
Code
10H Function
Code
02H
02H
8CH
* Register Code
8CH
* Register Code
00H
00H
03H
Data Length
03H
Data Length
06H
DATA Number
?
CRC High Byte
?
CRC Low Byte
*Send out the data from 28CH~28EH,
total 6 Byte
?
CRC High Byte
?
CRC Low Byte