ProSoft PLX32-EIP-MBTCP-UA - 6.3.3 MBTCP Error Codes

PLX32-EIP-MBTCP-UA ♦ Multi-Protocol Gateway MBTCP Protocol
User Manual
ProSoft Technology, Inc. Page 103 of 156
March 8, 2018
6.3.3 MBTCP Error Codes
Standard Modbus Exception Code Errors
These error codes are generated or returned on both the Controller and slave
ports. These codes are the standard Modbus errors.
Code
Description
1
Illegal Function
2
Illegal Data Address
3
Illegal Data Value
4
Failure in Associated Device
5
Acknowledge
6
Busy, Rejected Message
MBTCP Client Specific Errors
These error codes are specific to the MBTCP client.
Code
Description
-33
Failed to connect to server specified in command
-35
Wrong message length in the response
-36
MBTCP command response timeout (same as -11)
-37
TCP/IP connection ended before session finished
MBTCP Communication Error Codes
The gateway detects these command-specific error codes during initial command
list loading at gateway power-up or reset and are stored in the Command Error
List memory region.
Code
Description
-2
Timeout while transmitting message
-11
Timeout waiting for response after request (same as -36)
253
Incorrect slave/server address in response
254
Incorrect function code in response
255
Invalid CRC/LRC value in response