Monitoring Of Dynamic Control Valve Behavior "B._Devi - Siemens 6DR50 Series Operating Instructions Manual

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:
b1.TIM - Time constant of low-pass filter
Possible settings:
Purpose:
Factory setting:
SIPART PS2 with and without HART
Operating Instructions, 09/2014, A5E00074631-12
The "'52.XDIAG' Activating for extended diagnostics (Page 174)"
parameter is set to "On".
• 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. To activate monitoring, set the parameter to "On".
Sub-parameters are displayed.
The current value is displayed in "Diagnostics parameter '15.DEVI'
General control valve fault (Page 213)". The positioner triggers a
fault message if the current value exceeds one of the three config-
urable limit thresholds.
Sub-parameters are described below.
OFF
• Auto
• 1 ... 400
Use this sub-parameter to define the attenuation effect of the low-
pass filter. The unit is seconds. This sub-parameter is set to "Auto"
if the device is initialized automatically. The "b1.TIM" time constant
is calculated from the travel times "uP" and "doWn" determined
during the initialization.
If the time constant is inadequate, the setting of "b1.TIM" can be
changed manually. Set the time constant in a range from "1" to
"400". In this case:
• Setting "1" indicates too weak an attenuation.
• Setting "400" indicates too strong an attenuation.
The current value is displayed in "Diagnostics parameter '15.DEVI'
General control valve fault (Page 213)". The positioner triggers a
fault message if the current value exceeds one of the three config-
urable limit thresholds.
Auto
Parameterizing/addressing
9.4 Description of parameters
181