Monitoring Of Dynamic Control Valve Behavior 'B.\\Devi; Ac.fact3 - Factor 3 - Siemens SIPART PS2 Operating Instructions Manual

AC.FACT3 - Factor 3

Adjustment range:
Purpose:
Factory setting:
9.4.3.2

Monitoring of dynamic control valve behavior 'b.\\DEVI'

b. DEVI - Monitoring of dynamic control valve behavior
Requirement:
Possible settings:
Purpose:
Factory setting:
SIPART PS2 with and without HART
Operating Instructions, 02/2016, A5E00074631-AB
0.1 ... 100.0
Use this sub-parameter to set the factor for formation of threshold
3.
Set the factor in a range from '0.1' to '100.0'. The threshold is the
product of the reference stroke time and 'AC.FACT3'. The process
to determine the reference stroke time is described under
'A9.PSTIN'.
The threshold 3 message is displayed when threshold 3 is ex-
ceeded. The process to activate and display this message is de-
scribed in the 'XDIAG' parameter.
The positioner responds in accordance with the option set in the
sub-parameter 'A7.FLBH - Behavior after failed PST'.
5.0
The '52.XDIAG' Activating for extended diagnostics (Page 174)
parameter is set to 'On1', 'On2' or 'On3'.
• OFF
• On
This parameter allows you to monitor the dynamic control valve
behavior. The actual position course is compared with the ex-
pected position course for this purpose. This comparison helps in
drawing a conclusion about the correct operational response of the
control valve. Monitoring is performed in three steps. To activate
monitoring, set the parameter to 'On'. Sub-parameters are dis-
played. Appropriately set the sub-parameters.
The current value is displayed in Diagnostic value '15.DEVI - Gen-
eral control valve fault' (Page 215). The positioner triggers a mes-
sage if the current value exceeds one of the three thresholds.
OFF
Parameter assignment
9.4 Description of parameters
181