Siemens 6DR50 Series Operating Instructions Manual page 178

Parameterizing/addressing
9.4 Description of parameters
Purpose:
Description:
Factory setting:
A1.STPOS - Start position
Adjustment range:
Purpose:
Factory setting:
A2.STTOL - Start tolerance
Adjustment range:
Purpose:
Factory setting:
176
Use this parameter to activate and deactivate the partial stroke
test. The associated sub-parameters are displayed when you acti-
vate the parameter with "On".
Trigger the partial stroke test using:
• Buttons on the device
• A binary input
• Communication
• A cyclic test interval
Sub-parameters are described below.
The current value is displayed in "Diagnostics parameter '15.DEVI'
General control valve fault (Page 213)".
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
position 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".
Example: You have set 50% as a start position and 2% as a start
tolerance. In this case, a partial stroke test is initiated during op-
eration only between a current position of 48 and 52%.
2.0
SIPART PS2 with and without HART
Operating Instructions, 09/2014, A5E00074631-12