A1.STPOS - Start position
Setting range: 0.0 ... 100.0
Purpose: Use this sub-parameter to define the start position of the partial
stroke test in percent. Set the start position in a range from "0.0" to
"100.0". The triggering of alarms (limits) is relative to the MPOS
scale.
The actuator moves during the partial stroke test from the start po‐
sition to the target position. The target position is determined from
the interaction between start position (A1.STPOS), stroke height
(A3.STRKH) and stroke direction (A4.STRKD).
Factory setting: 100.0
A2.STTOL - Start tolerance
Setting range: 0.1 ... 10.0
Purpose: Use this sub-parameter to assign the start tolerance of the Partial
Stroke Test in percent. Enter the start tolerance relative to the start
position in a range from "0.1" to "10.0".
Example: You have set "50.0" as start position and "2.0" as start tolerance. In
this case, a Partial Stroke Test is initiated during operation only
between a position of 48% and 52%.
Factory setting: 2.0
A3.STRKH - Stroke height
Setting range: 0.1 ... 100.0
Purpose: Use this sub-parameter to assign the stroke height of the Partial
Stroke Test in percent. Set the stroke height in a range from "0.1" to
"100.0".
Factory setting: 10.0
A4.STRKD - Stroke direction
Possible settings: ● uP
● do
● uP do
Purpose: Use this sub-parameter to assign the stroke direction of the Partial
Stroke Test.
uP: Actuator only moves upward
● The actuator moves from its start position to the upper target
position.
● After reaching the upper target position, the actuator moves
back to the start position.
Parameter assignment
8.4 Description of parameters
SIPART PS2 with 4 to 20 mA/HART
164 Operating Instructions, 11/2019, A5E00074631-AE
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