Weidmuller WI-I/O-9-U2: Wireless Mesh I/O & Gateway User Manual V1.2.2 - Manual (Page 94)

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Each Expansion I/O module has the following registers.
30017 + Offset = Modbus Error Counter (number of errors the modules has had)
30018 + Offset = Last WI-I/O-EX-1-S Status Code / Modbus Error Code.
Will display the following WI-I/O-EX-1-S Status Codes (Hex code 1-5 & 129), as
well as the standard Modbus Response Codes shown in Appendix D with a slight
difference in the code.
The MSB will be one of the following bytes, 82, 84, 8F or 90 followed by the
standard Modbus Response codes (01 -0B).
Dec
Code
Hex
Code
Name Meaning
1 0001 No Response No response from a poll
2 0002 Corrupt/invalid Corrupt or invalid data
3 0003 CRC Fail
CRC error check does not match the message, Different
message or possible data corruption.
4 0004
Response did
not match
request.
The response heard was not the correct ID, possibly heard
other RS485 traffic.
5 0005
Message type
did not match
request. The response heard did not match the requested poll, i.e.
different command response, possibly heard other RS485
traffic.
81 0129
Problem
accessing
local memory
Could not access register location, possibly because the
register is not initialised.
??01-
??0B
Standard
Modbus Error
Codes
As per Appendix D: Modbus Error Codes
30019 + Offset = Modbus Lost Link Counter (number of Communication Errors)
30020 + Offset = Modbus Module Type

dec 257 (101hex) indicates a WI-I/O-EX-1-S-11

dec 513 (201hex) indicates a WI-I/O-EX-1-S-12

dec 769 (301hex) indicates a WI-I/O-EX-1-S-13