Flowserve MX HART Field Unit - Manual (Page 40)

MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14
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3.6.2 Partial Stroke Test
The actuator must be “in REMOTE” and not in “Remote Configuration Mode”. The Partial Stroke Test will not start if
the unit is not in the correct configuration or has any system faults. Once the Partial Stroke Test starts, the actuator
will display “PST ACTIVE” and move to the given target. Upon reaching the target, the actuator will return to the
starting position. If any system faults are encountered during the transition to target and back, the actuator will stop
at the position where the fault occurred, the PST ACTIVE display will be cleared, and the test results will indicate
failed. Command 48 (or Device-Specific command 149) can be used to obtain more details on what fault occurred.
The process should not be controlling the unit while the Partial Stroke Test is active (i.e., the loop current should be
constant and not changing).
The Partial Stroke Test may be initiated from the DD menu Diagnostics->Operation as follows:
Click the Partial Stroke Test button and the following warning will be displayed:
Click OK (with Yes) selected to continue.