Folks, please share any of your previous encouters on this issue:
System: DeltaV 11.3.1
AMS: 11.1.000.085
We have two Flow Transmitters from Khrone (M10 and M20) connected to a 8 channel, Series 2, HART redundant AI card.
Channel 4: Krohne ESK4 M40 Rev 1 Variable Area Flow Meter
Channel 5: Khrone M10 Rev 2 Variable Area Flow Meter
These two transmitters generate a pattern of events that propogate to the A&Es in DeltaV and AMS Audit Trail. Below are the sequence of status alerts seen in Audit Trail and there are intermittent.
* ABNORM: Extended Module ESK4-IO Detected
*ADVISE: Configuration Change
*COMM: Communications failure
Everytime a communication failure triggers a negative field value from the flow transmitter and the flow drops suddenly to a negative valve just below zero and recovers to a steady flow value after 6 seconds approximately as seen on the flow trends.
When I disable HART functianlity on these chennels and monitor the flow, the spurious flow PVs diappear.
In reply to Arturo Medina: