Installation, Operating & Maintenance Instructions
Series 612 DN 25 (I.D. 1”), Logic
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
289700EB
2011-10-21
33/57
3.10.1.4 Valve
speed
adjustment
Valve speed effects:
•
Response time
Default value is 1000. Adjustment range is from 1 to 1000.
This parameter effects valve plate actuating speed.
Speed adjustment is effective for PRESSURE CONTROL and POSITION CONTROL.
Note: Normally best pressure control response is achieved with max. valve speed. In particular applications it may be of
advantage to have a slower valve response.
Note: OPEN and CLOSE are always done with max. speed.
Adjustment procedure:
1. Use optimal gain factor, sensor delay time and setpoint ramp according to preceding tuning steps.
2. Open
valve.
3. Control a typical pressure / flow situation.
4. Repeat from step 2 with slower valve speed until required response is achieved.
Local operation
:
(‘Control View’, ‘Control Performance Analyzer’ or
‘Service Box 2‘)
Remote operation
:
Do configuration in menu ‘Setup / Control Parameter’.
Note: It’s not possible to do ‘Valve speed adjustment‘
via remote operation.
3.11 Logic interface
Default configuration:
OPEN input
CLOSE input
OPEN output
CLOSE output
not inverted
not inverted
open
close
