How to diagnose an unplanned controller redundancy switchover on an Emerson DeltaV DCS
Unplanned switchover means the primary controller faulted and transferred to the secondary. Review the event log to identify the fault type before restoring the secondary as hot standby.
~45 min7 steps
How to fix an I/O card communication fault on an Emerson DeltaV DCS
A BAD I/O card status means field signals are not reaching the controller. Identify whether the fault is the card, the carrier backplane, or the fieldbus wiring.
~30 min8 steps
How to fix workstation communication loss on an Emerson DeltaV DCS
A single workstation losing communication is almost always a network issue: cable, switch port, NIC, or IP conflict. Check hardware first, then software.
~30 min7 steps