7300CV MODBUS COMMUNICATION PROTOCOL
File No. :PC-CV-08
Version : 1.A
Page :
9/34
5.Command Start Address description
5.1 Ladder(* )page 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
31H
32H
34H
Data length
(Byte)
30H
30H
*Register Number
Send out the data from 200H~209H,
total 40 Byte
30H
?
30H
?
CHECK
SUM,
30H
0DH
END
41H
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
14H Data
length
00H
*Register Number
00H
Sent out the data from 200H~209H,
total 20 Byte
0AH
Data Length
?
CRC High Byte
CRC High Byte
?
CRC Low Byte
CRC Low Byte