VAT 642 Series Installation, Operating, & Maintenance Instructions page 53

Series 642
4.7.1.4 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.
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')
Go to 'Setup / Control Parameter' menu. Select
valve speed.
605403ED
INSTALLATION
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.
OPEN and CLOSE are always done with maximum speed.
Edition 2017-11-24
Remote operation:
It's not possible to do 'Valve speed
adjustment' via remote operation.
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