X-317™ Users Manual
Operation
5.3.4.3 Errors
Error Response Frame Example
Field Name
Length
Function
Example Data
Transaction Identifier
2 bytes
Synchronization between messages of
server and client.
0x0001
Protocol Identifier
2 bytes
Zero for Modbus/TCP
0x0000
Message Length
2 bytes
Number of bytes in frame (below)
0x0003
Unit Identifier
1 byte
Slave Address (0xFF if not used)
0xFF
Function Code
1 byte
Error code
0x83
Data
1 byte
Exception code
0x01 = function code not supported
0x02 = incorrect starting address or input
quantity combination
0x01 or 0x02
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