Communication Error Codes; Standard Modbus Protocol Exception Code Errors; Module Communication Error Codes; Command List Entry Errors - ProSoft Technology MVI69E-MBTCP User Manual

Diagnostics and Troubleshooting
User Manual
6.5

Communication Error Codes

Note: If an error code is reported that is not listed below, check with the documentation of the
Modbus device(s) on the module's application ports. Modbus devices can produce device-specific
error codes.

6.5.1 Standard MODBUS Protocol Exception Code Errors

Code
1
2
3
4
5
6

6.5.2 Module Communication Error Codes

Code Description
-1 CTS modem control line not set before transmit
-2 Timeout while transmitting message
-11 Timeout waiting for response after request
253 Incorrect slave address in response
254 Incorrect function code in response
255 Invalid CRC/LRC value in response

6.5.3 Command List Entry Errors

Code
-41
-42
-43
-44
-45
-46
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Description
Illegal Function Code
Illegal Data Address
Illegal Data Value
Failure in Associated Device
Acknowledge
Busy, Rejected Message
Description
Invalid enable code
Internal address > maximum address
Invalid node address (< 0 or > 255)
Count parameter set to 0
Invalid function code
Invalid swap code
MVI69E-MBTCP ♦ CompactLogix Platform
Modbus TCP/IP Enhanced Communication Module
ProSoft Technology, Inc.
June 28, 2017