Siemens SIPART PS2 6DR50 Series, Manual

Page: 135 / 160

Operation
135
SIPART PS2 Manual
A5E00074631--06
9 Partial stroke test exceeds reference step time
This error message appears on the one hand if a manual or cyclic
partial stroke test is triggered and the test cannot be started because
the valve is not within the start tolerance range. The error message
also appears if one of the three thresholds of the partial stroke test that
are a result of the reference step time (A6.PSTIN) times factors
(A7.FACT1 to A9.FACT3) is violated. How serious the error message
is, can be seen at the bar graph on the right side of the display. At the
same time, the severity of the error message is output via the fault
message output or the alarm outputs, according to the operating mode
of the extended diagnostics.
10 General control valve malfunction
The monitoring of the operational behavior triggers if the actual valve
position leaves a narrow corridor between guide value and expected
position sequence. In this case, the deviation between expected and
actual position sequence is filtered and output and compared to the set
thresholds that are the result of the limit (b2.LIMIT) times the factors
(b3.FACT1 to b5.FACT3).
11 Pneumatic leakage
This error message appears if the leakage indicator exceeds the set
thresholds. Note that the function can only take effect with its entire
sensitivity if a ramp test is performed to set the leakage indicator after
initialization (see Explanations on C1.LIMIT).
12 Slipstick effect too high
If the slipstick of the control valve is increased during operation of if an
increasing number of slip jumps are detected, the relevant limits can be
exceeded, resulting in an error message.
13 Temperature fallen short of
This error message appears if the lower temperature limit thresholds
are fallen short of.
14 Temperature exceeded
This error message appears if the upper temperature limit thresholds
are exceeded.
15 Monitoring of the position average
If a position average is calculated when a comparison interval passes
that deviates from the reference value by more than the set thresholds,
this error message triggers.