Series 642
INSTALLATION
605593EC
Edition 2017-11-24
51/113
4.7.1.4
Valve speed adjustment
Valve speed effects: Response time
Adjustment range is from 1 to 1000.
This parameter effects valve plate actuating speed.
Speed adjustment is effective for PRESSURE CONTROL and POSITION CONTROL.
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.
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:
(Refer to chapter «Explicit messaging setup
commands» for details)
Go to ‘Setup / Control Parameter’ menu. Select
valve speed.
Send VALVE SPEED