we have version 800XA 5.1 rev E.
the problem is :
one or more controllers have failed, the fault LED flashes red and communication with the servers is down,
this failure is present almost every 12 or 15 days.
we are checking the controller log, but there is nothing strange.
Please some recommendations, what to do?
Voted best answer
Controller Log files are required to find out the root cause of Controller Shutdown issue.
Have you checked System Release Notes and Fixed Problems in the document number "2PAA112277"?
So many Controller Shutdown problems fixed information are available in this document.
One Good Example shown below if you are using IAC communication:
Pls register a support line case with ABB to avoid potential economic losses.