Monitoring Of Dynamic Control Valve Behavior; Monitoring The Pneumatic Leakage; Monitoring Of Stiction (Slipstick); Monitoring The Lower Limit Temperature - Siemens SIPART PS2 Operating Instructions Manual

Alarm, fault and system messages
11.3 Online diagnostics
displayed using the fault message output or alarm outputs depending on the mode of the
advanced diagnostics.
11.3.4.9

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".
11.3.4.10

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").
11.3.4.11

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.
11.3.4.12

13 Monitoring the lower limit temperature

This fault message appears when the lower limit temperature thresholds are undershot.
11.3.4.13

14 Monitoring the upper limit temperature

This fault message appears when the upper limit temperature thresholds are overshot.
11.3.4.14

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.
11.3.4.15

16 Monitoring the plausibility of values for the partial stroke test

This error message is triggered if, when starting a partial stroke test, the plausibility check of
the "A1.STPOS", "A3.STRKH" and "A4.STRKD" parameters was not successful.
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SIPART PS2 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00127926-AB