7300CV MODBUS COMMUNICATION PROTOCOL
File No. :PC-CV-08
Version : 1.A
Page :
8/34
Function Description
Command
Start Address
Data length
(WORD)
RUN&Stop(PLC) 330H
1
All memory clear
(Clear Plc Memory)
331H 1
06
PASSWORD 332H
1
Note: ‘Write Ladder page write’ and ‘Clear all memory’ are not available under PLC running
mode.
4.Error code
ASCII Mode RTU Mode
STX
‘:’ SLAVE
Address 02H
‘0’ Function
83H
Address
‘1’ Exception
code
52H
‘8’
High C0H
Function
‘6’
CRC-16
Low CDH
‘5’
Exception
code
‘1’
‘2’
LRC Check
‘8’
‘CR’
END
‘LF’
Under communication linking, the driver responses the Exception Code and send Function Code AND
80H to main system if there is error happened.
Error
Code
Description
51
Function Code Error
52
Address Error
53
Data Amount Error
54
Data Over Range
55
Writing Mode Error