A7.FLBH - Behavior after failed PST
Setting options: ● Auto
● HOLd
● AirIn
● AirOu
Purpose: 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.
Factory setting: Auto
A8.INTRV - Test interval
Adjustment range: OFF, 1 ... 365
Purpose: 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.
Factory setting: OFF
A9.PSTIN - Reference stroke time for partial stroke test
Indication on the display: ● NOINI
● (C)##.#
● FdIni
● rEAL
Purpose: Status for reference stroke time in seconds
Description: 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".
Parameter assignment
8.3 Description of parameters
SIPART PS2 with PROFIBUS PA
166 Operating Instructions, 05/2019, A5E00127926-AC
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