Exceptions - Zener MSC-3 Instruction Manual

MSC-3 Start Up
Response:
Function code
MEI type
1
Read device ID code
Conformity level
More follows
Next object Id
Object ID
Object byte count
Object data
MODBUS Encapsulated Interface
1
Error:
Function code
Exception code

Exceptions

The exception codes supported are explained in detail in the document entitled "MODBUS Application
Protocol Specification V1.1b". Exception codes supported by the MSC-3 are:
Exception Name
code
1 ILLEGAL FUNCTION CODE
2 ILLEGAL DATA ADDRESS
3 ILLEGAL DATA VALUE
130
1 byte
1 byte
1 byte
1 byte
1 byte
1 byte
1 byte
1 byte
"Object byte count" bytes
1 byte
1 byte
IM00120 IM00120
43
14
1  Request Basic Device ID
0
0
0
0  Vendor name
1  Product code
2  Major/minor Revision
171 (128+function code, 0xAB)
1, 2 or 3