Partial Stroke Test; Monitoring Of Dynamic Control Valve Behavior; Monitoring The Pneumatic Leakage; Monitoring Of Stiction (Slipstick) - Siemens SIPART PS2 Operating Instructions Manual

Alarm, error, and system messages
10.3 Online diagnostics
10.3.4.8

9 Partial stroke test

On the one hand, this fault message appears when a manual or cyclic partial stroke test is
initiated and the test cannot be started since the valve is not within the starting tolerance. On
the other hand, the fault message appears when one of the three thresholds of the partial
stroke test that are determined from the 'A9.PSTIN' reference stroke time multiplied by
factors 'AA.FACT1', 'Ab.FACT2' and 'AC.FACT3' is violated. The severity of the fault
message is shown by the number of bars on the display. The severity of the fault message is
simultaneously displayed using the fault message output or alarm outputs depending on the
mode of the advanced diagnostics.
10.3.4.9

10 Monitoring of dynamic control valve behavior

The monitoring of the operational behavior responds when the actual valve position shifts
from a narrow corridor between the setpoint and the expected position course. In this case,
the deviation between the expected and actual position course is filtered, displayed and
compared with the configured thresholds that are determined from the "b2.LIMIT" limit
multiplied by the factors "b3.FACT1" to "b5.FACT3".
10.3.4.10

11 Monitoring the pneumatic leakage

This fault message appears when the leakage indicator exceeds the configured thresholds.
Keep in mind that the complete sensitivity of this function can be used only if a ramp
movement was initiated after initialization to set the leakage indicator (see explanations for
"C1.LIMIT").
10.3.4.11

12 Monitoring of stiction (slipstick)

If the stiction of the control valve increases during operation or if an increasing number of
Slipjumps is detected, "d1.LIMIT" could be exceeded and result in this fault message.
10.3.4.12

13 Monitoring the lower limit temperature

This fault message appears when the lower limit temperature thresholds are undershot.
10.3.4.13

14 Monitoring the upper limit temperature

This fault message appears when the upper limit temperature thresholds are overshot.
10.3.4.14

15 Monitoring the position average value

This fault message appears when a position value calculated after the expiry of a
comparison interval deviates from the reference value by more than the configured
thresholds.
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SIPART PS2 with and without HART
Operating Instructions, 02/2016, A5E00074631-AB