ControlLogix errors in console

Ignition
1

I was notified of a problem this morning where a large number number of alerts were logged that were never actually present on the PLC. At almost exactly the same time I’m seeing a lot of warnings in the console that look like this:

9:12:52 AM ABControlLogixForwardOpenRequest Forward Open request failed. Status: 32767
9:12:52 AM ABControlLogixTransport Unsuccessful Forward Open. Returned status value: 1
9:12:52 AM ABControlLogixForwardOpenRequest Forward Open request failed. Status: 32767
9:12:52 AM ABControlLogixTransport Unsuccessful Forward Open. Returned status value: 1

What do those warnings mean?

Ignition version is 7.5.0.

2

A return status code of 1 is a CIP error for Connection Failure.
This is happening during the CIP forward open request.

It means there is a successful TCP connection between Ignition and the ENBT or other Ethernet module, but the connection from the ENBT to the processor is not happening during the forward open request.

How often are they happening? If they are happening occasionally, then the retry is successful normal communications are resuming.

3

Judging by the alerts getting logged, it looks like it’s happening roughly every 60-90 minutes.

4

Can you send in the logs to support?

5

This was fixed by upgrading to 7.5.4.

Thanks to Tom for all his help.