Monitoring Pneumatic Leakage 'C.\\Leak - Siemens SIPART PS2 Operating Instructions Manual

9.3.3.3

Monitoring pneumatic leakage 'C.\\LEAK'

C. LEAK - Monitoring pneumatic leakage
Note
Accuracy of results
Please note that this monitoring only delivers results in the case of single-acting, spring-loaded
actuators and a setpoint from 5 to 95%.
Note
Activated tight closing function
Please note that this monitoring only delivers results in the case of an activated tight closing
function and a setpoint with the following values:
Lower value for tight closing (YCDO) +5 % up to upper value for tight closing (YCUP) -5 %
Requirement:
Possible settings:
Purpose:
Factory setting:
C1.LIMIT - Limit for leakage indicator
Adjustment range:
Purpose:
SIPART PS2 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00127926-AB
The '50.XDIAG' Activation of extended diagnostics (Page 170) pa‐
rameter is set to 'On1', 'On2' or 'On3'.
● OFF
● On
Use this parameter to detect leakages in the actuator or in the pipe
installation. Monitoring is performed in three steps. To activate mon‐
itoring, set the parameter to 'On'. Sub-parameters are displayed.
Appropriately set the sub-parameters.
The current value is displayed in Diagnostic value '16.ONLK - Pneu‐
matic leakage' (Page 259). The positioner triggers a message if the
current value exceeds one of the three thresholds.
OFF
0.1 ... 100.0
Use this sub-parameter to set the limit of the leakage indicator in
percent. Set the limit in a range from '0.1' to '100.0'. If no leakage
exists, monitoring of the pneumatic leakage is automatically calibra‐
ted in such a way during the initialization (see section Commission‐
ing (Page 113)) that the leakage indicator remains below the value
30. If a value above 30 is displayed, this means that a leakage exists.
'30.0' is therefore an advisable setting for the parameter. After a
certain time this limit can be varied slightly depending on the appli‐
cation.
Parameter assignment
9.3 Description of parameters
181