Siemens SIPART PS2 6DR50xx Manual page 110

Operation
A. PST
A1.STPOS
A2.STTOL
A3.STEP
A4.STEPD
A5.INTRV
110
Partial stroke test
This parameter activates the partial stroke test for the cyclic or manual
partial stroke test of Up/Down and modulating valves.
The partial stroke test can be triggered via keyboard, a binary input or
the HART communication.
Start position
The start position of the partial stroke test is specified here within the
range of 0.0 to 100.0%.
Start tolerance
The start tolerance in relation to the start position is specified here in
the range of 0.1 to 10.0%. That means, with a start position of e.g. 50%
and a start tolerance of 2%, a partial stroke test can only be triggered
during operation if the current position is between 48 and 52%.
Step height
Input of the step height of the partial stroke test within the range of
0.1 to 100.0%. The factory setting is 10.0%.
Step direction
Input of the step direction of the partial stroke test. The following
options are available:
"up", "do" (down), "up do" (up and down). If "up" is selected, the
actuator is moved in a controlled manner from its start position to the
target position (start position + step height) and then back to the
original position in a controlled way once the target position has been
reached. The procedure for the "do" option is the same but in the
opposite direction. With "up do", the actuator first travels in a controlled
manner from its start position to the upper target position (start position
+ step height), then controlled from the upper to the lower target
position (start position -- step height). After reaching the lower target
position, it returns to its original position in a controlled manner.
Test interval
Input of the interval for the cyclic partial stroke test within the range of
one day to 365 days.
SIPART PS2 Manual
A5E00074631--06