Alarm, error, and system messages
10.3 Online diagnostics
SIPART PS2 with and without HART
224 Operating Instructions, 10/2013, A5E00074631-11
9 Partial stroke test exceeds the reference stroke time
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, this fault message appears when one of the three thresholds of the partial
stroke test that are determined from the "A6.PSTIN" reference stroke time multiplied by
factors "A7.FACT1" to "A9.FACT3" is violated. The degree of the fault message is shown in
the number of columns on the display. The degree of the fault message is simultaneously
displayed using the fault message output or alarm outputs depending on the mode of the
extended diagnostics.
10 General control valve fault
The monitoring of the operational response responds when the actual valve position shifts
from a narrow corridor between the reference variable 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".
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").
12 Static friction/slipstick effect is too large
If the static friction of the control valve increases during operation or more Slipjumps are
detected, it may exceed the corresponding limits and lead to this fault message.
This fault message appears when the lower limit temperature thresholds are undershot.
This fault message appears when the upper limit temperature thresholds are overshot.
15 Monitoring of the position average
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.
Description of parameter C (Page 181)
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