
Diagnostics and Troubleshooting DFNT ♦ ProLinx Gateway
Protocol Manual EtherNet/IP Explicit Messaging Client/Server
Page 66 of 124 ProSoft Technology, Inc.
July 24, 2013
4.6 TCP/IP Interface Errors
4.6.1 Timeout Errors
Failed to connect to target
Failed to register session with target (timeout)
Failed forward open response timeout
PCCC command response timeout
No TCP/IP connection error
ARP could not resolve MAC from IP (bad IP address, not part of a
network, invalid parameter to ARP routine).
Error during ARP operation: the response to the ARP request did not
arrive to the module after a 5 second 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.
4.6.2 Register Session Response Errors
Invalid length field parameter
Context field not matched
4.6.3 Forward Open Response Errors
Message Length received not valid
Command code returned not valid
Session handle field invalid
Context field not matched
CPF item count not correct
CPF status error reported
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