Often we recieve "communication failure" alerts from the fieldbus devices. They are all conneted to the same port of Fieldbus H1 card (Redundant). They don't bump the process and they clear once they are acknowledged. The DeltaV diagnostics doesnt show any errors. I could see these alarms from the alarm list (Operate) and also in the AMS Alert monitor. Any experience to share?
Appreciate you time.
SD