Siemens SIPART PS2 Operating Instructions Manual page 166

Parameter assignment
8.3 Description of parameters
A7.FLBH - Behavior after failed PST
Setting options:
Purpose:
Factory setting:
A8.INTRV - Test interval
Adjustment range:
Purpose:
Factory setting:
A9.PSTIN - Reference stroke time for partial stroke test
Indication on the display: ● NOINI
Purpose:
Description:
166
● Auto
● HOLd
● AirIn
● AirOu
Assign how the positioner is to respond if a partial stroke test fails.
Note: A partial stroke test fails if the limit threshold assigned in
"Factor 3 (AC.FACT3)" is exceeded.
● Auto: Switch to "Automatic" mode. "AUT" is displayed on the
device.
● HOLd: Hold current position.
● AirIn: Pressurize actuator with supply air PZ.
● AirOu: Depressurize actuator.
Auto
OFF, 1 ... 365
Use this sub-parameter to enter the interval time for the cyclic par‐
tial stroke test in days. Set the test interval in a range from 1 to 365.
OFF
● (C)##.#
● FdIni
● rEAL
Status for reference stroke time in seconds
Use this sub-parameter to measure the reference stroke time for
the partial stroke test.
The reference stroke time corresponds to the controlled movement
from the start position to the target position.
If the positioner has already been initialized, the calculated average
travel time of the control valve is displayed as a reference value.
● NOINI: Positioner has not yet been initialized.
● (C)##.#: An average travel time of 1.2 seconds, for example, is
shown in the display as "C 1.2", whereby "C" stands for
'calculated'. The average travel time can be used as a reference
stroke time. However, it merely represents a rough guideline
value.
● FdIni: If the starting position cannot be approached or the stroke
target cannot be achieved, "FdIni" is displayed. "FdIni" stands
for "failed PST initialization".
SIPART PS2 with PROFIBUS PA
Operating Instructions, 05/2019, A5E00127926-AC