ProSoft Technology MVI71-MNET - Manual (Page 87)

Reference MVI71-MNET ♦ PLC Platform
User Manual Modbus TCP/IP Interface Module
ProSoft Technology, Inc.
Page 87 of 109
June 23, 2009
Standard Modbus Protocol 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
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
MNET Client Specific Errors
Code Description
-33 Failed to connect to server specified in command
-36 MNET command response timeout
-37 TCP/IP connection ended before session finished
Command List Entry Errors
Code Description
-40 Too few parameters
-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
-47 ARP could not resolve MAC from IP (bad IP address, not part of a network, invalid
parameter to ARP routine).
-48 Error during ARP operation: the response to the ARP request did not arrive to the
module after a user-adjustable ARP Timeout.
Note: When the client gets error -47 or -48, it uses the adjustable ARP Timeout parameter in the
configuration file to set an amount of time to wait before trying again to connect to this non-existent
server. This feature allows the client to continue sending commands and polling other existing
servers, while waiting for the non-existent server to appear on the network.