Monitoring The Lower Endstop ''F.\\Zero - Siemens SIPART PS2 Operating Instructions Manual

Parameter assignment
9.3 Description of parameters
9.3.3.6

Monitoring the lower endstop ''F.\\ZERO'

F. ZERO - Monitoring the lower endstop
Note
Fault detection
Monitoring the lower endstop not only responds to faults in the valve. If the limit thresholds of
the lower endstop are exceeded due to misalignment of the position feedback, the
misalignment also triggers a diagnostics message.
Requirement:
Possible settings:
Purpose:
Factory setting:
F1.LEVL1 - threshold 1
Adjustment range:
Purpose:
Factory setting:
186
The '50.XDIAG' Activation of extended diagnostics (Page 170) pa‐
rameter is set to 'On1', 'On2' or 'On3'.
The '36.YCLS' Tight closing with manipulated variable (Page 162)
parameter is set to 'do' or 'uP do'.
● OFF
● On
Use this parameter to activate continuous monitoring of the lower
endstop. The monitoring is executed whenever the valve is in the
'Lower tight closing' position. It checks whether the lower endstop
has changed compared to its value during initialization. Monitoring
is performed in three steps. Set the following sub-parameters ap‐
propriately. To activate monitoring, set the parameter to 'On'. Sub-
parameters are displayed.
The current value is displayed in Diagnostic value '18.ZERO - Lower
endstop' (Page 260). The positioner triggers a message if the cur‐
rent value undershoots one of the three thresholds.
OFF
0.1 ... 10.0
Use this sub-parameter to set threshold 1 for the lower endstop in
percent. Set the threshold in a range from '0.1' to '10.0'.
The positioner triggers a message if the difference between the low‐
er endstop and the initialization value undershoots threshold 1. The
process to activate and display this message is described in the
'XDIAG' parameter.
1.0
SIPART PS2 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00127926-AB