Installation, Operating & Maintenance Instructions
Series 650 DN 100-
250 (I.D. 4“ - 10”), DeviceNet
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
266341ED
2012-07-13
40/79
Choose the applicable formula depending on units you are familiar with.
t = Setpoint Ramp
Adjustment procedure:
1. Start with optimal gain factor and sensor delay time according to preceding tuning steps.
2. Control a typical pressure / flow situation.
3. Control a lower pressure.
4. Repeat from step 2 with longer setpoint ramps until best response is achieved.
5. Verify pressure control response for a setpoint raise situation.
Note:
In case a long ramp time is required to get optimal performance for pressure decrease situations it may be of
advantage to apply different settings for decrease / raise control situations.
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 setpoint ramp.
Select PID CONTROLLER SETPOINT RAMP
P
START
P
SFS
t
P
END
Without setpoint ramp optimizing
With setpoint ramp optimizing
