Final Control Element Diagnostics - ABB 800xA Operation

Section 8 Control Loop Asset Monitor (CLAM)
Loop Performance Diagnostics include the following:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Cascade Tracking.
11. Response Speed.
To calculate FCE/LPS summary the above diagnostics are used along with the
Weight given by user for each hypothesis/precondition.
The subcondition of the FCE/LPS Summary does not depend on a single
hypothesis, it is the cumulative of all hypotheses and their corresponding weights. It
is not necessary that if one of the hypothesis is not okay then the subcondition will
be abnormal. The subcondition also depends on the threshold defined by the user in
Asset Parameter. If FCE/LPS summary value goes beyond the threshold, the
subcondition will change accordingly. It means that one or more diagnostics related
to FCE/LPS is not okay, and the user should check and take appropriate action as
necessary

Final Control Element Diagnostics

Final Control Element Diagnostics include the following:
FCE Action
Poor controller performance can decrease the life of the valve, since the valve has to
work excessively. This diagnosis indicates excessive valve movement, irrespective
of the overall performance (good or bad). The diagnosis is based on the
3BUA000150-600
Loop Tuning.
SetPoint Oscillation.
External Disturbances.
Data Reliability.
Harris Index.
Setpoint Crossing Index.
Oscillation Index.
Controller Output Saturation.
Manual Mode.
Final Control Element Diagnostics
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