Siemens SIPART PS2 Operating Instructions Manual page 174

Parameter assignment
9.3 Description of parameters
Purpose:
Factory setting:
A1.STPOS - Start position
Adjustment range:
Purpose:
Factory setting:
A2.STTOL - Start tolerance
Adjustment range:
Purpose:
Example:
Factory setting:
174
Use this parameter to activate and deactivate the partial stroke test.
To activate monitoring, set the parameter to 'On'. Sub-parameters
are displayed.
Trigger the partial stroke test using:
● Buttons on the device
● A binary input
● Communication
● A cyclic test interval
The current status of the partial stroke test displayed in Diagnostic
value '12.PST - Monitoring of partial stroke test' (Page 258).
Diagnostic value '13.PRPST' - Time since last partial stroke test'
(Page 259) and Diagnostic value '14.NXPST - Time until next partial
stroke test' (Page 259) provide further information on the partial
stroke test.
OFF
0.0 ... 100.0
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).
100.0
0.1 ... 10.0
Use this sub-parameter to define the start tolerance of the partial
stroke test in percent. Set the start tolerance relative to the start
position in a range from '0.1' to '10.0'.
You have set '50.0' as a start position and '2.0' as a start tolerance.
In this case, a partial stroke test is initiated during operation only
between a position of 48 and 52%.
2.0
SIPART PS2 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00127926-AB