All datalinks go to &&&&; Event Journal shows flurry of ACN COMM events between various nodes

Beginning at 5:45 this morning, the event journal started recording numerous "ACN COMM" events concerning a variety of nodes. All nodes are wired copper to 24 port R100 switches. Every node experienced between 200 and 700 such events (e.g. "Switched to Secondary ACN" , "Device Connection Failure", etc.) I don't know if it's significant - the only nodes with no such events were 1420 WirelessHart gateways that come in over fiber to port1.1.

Within 30 minutes the board starting seeing their DeltaV Operate graphics DataLinks go to "&&&&&". Then the data would reappear after 5-20 seconds. One station was rebooted after the &&&&& lingered.

No diagnostics of note on the switches - only a couple "Port High Utilization" on the Secondary switch.

Another workstation that had a persistent "BAD" communications on its secondary was rebooted, which cleared that error. Since then the ACN events have stopped (knock on wood).

I have a case open with GSC . . . anyone seen this?

  • In reply to kathrynpate:

    Sorry, I should have been more specific. This was on v13.3.1

    We saw the exact same response as you described. I'm curious if you have WS_06 installed for 13.3.1 or something else? I think its only been out for a month maybe? I would have thought that Emerson would have "recalled" it after our problem considering the issues on operator stations. Good luck! I hope you can resolve your issue as quickly as we did. We were lucky that there weren't any critical operations going on that day.

    Kathy Pate

    Toray Carbon Fibers America

    Decatur, AL 35601

    kathy.pate@toraycma.com