ProSoft Technology MVI69E-MBS - Manual (Page 107)

MVI69E-MBS ♦ CompactLogix Platform Diagnostics and Troubleshooting
Communication Module User Manual
ProSoft Technology, Inc. Page 107 of 162
January 6, 2014
6.5 Communication Error Codes
Standard Modbus Protocol Exception Code Errors
Code Description
1 Illegal Function Code
2 Illegal Data Address
3 Illegal Data Value
4 Failure in Associated Device
5 Acknowledge
6 Busy, Rejected Message
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
Command List Entry Errors
Code Description
-41 Invalid enable code
-42 Internal address > maximum address
-43 Invalid node address (< 0 or > 255)
-44 Count parameter set to 0
-45 Invalid function code
-46 Invalid swap code
Note: If an error code is reported that is not listed above, check with the documentation of the
Modbus device(s) on the module's application ports. Modbus devices can produce device-specific
error codes.