We have a system with 4 CompactLogixs v20 and they keep changing from Connected: Protocol: EIP - Run Mode to Connected:Browse Pending then back. They are using the Legacy Allen-Bradley CompactLogix type and I have automatic browse turned off. They do not all drop out at once and probably average one PLC dropping per minute. I set up a contentious ping and was probably getting one time out in 50. The rest were ~1ms. The only thing that has changed is the network card on the server. It was happening before but only a couple of times a day. In trying to fix it I updated from 7.9.3 and updated java as well. They did not seem to help(But I was planning to do it soon anyways).
This is about the first message that shows in the logs:
“ABControlLogixTransportPool 30Dec2017 12:19:57 [TruckA] Reseting CIP connection for transaction ID of 7584”
Then it will say this:
“CompactLogixDriver 30Dec2017 12:20:01 Comm state changed to INACTIVE” then the comm state goes active with the same timestamp.
The next is:
“ABControlLogixBrowseRequest 30Dec2017 12:20:01 [TruckA] Creating browse request using HIGH priority.”
After that it goes back to working just fine.
Any help would be great. I will continue to work on it and will give an update if I find a solution.
Windows server 2012 64bit
7.9.5 64bit 8gb ram
4-CompactLogix PLCs v20
2 to 6 clients (2 at the moment)