Installation, Operating & Maintenance Instructions
Series 612 DN 40 (I.D. 1.5”), RS485
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
289917EA
2011-07-07
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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
:
(Refer to chapter «setup commands» for details)
Go to ‘Setup / Control Parameter’ menu. Select valve
speed.
Send VALVE SPEED
3.11 RS485 interface
3.11.1 Settings
The factory default setting of the RS485 interface is shown in the table below. It might be changed to fit the application by
using the Control View software, the Control Performance Analyzer software or the Service Box 2.
Baud rate
Data bits
Stop bits
Parity
9600 7
1
none
Address
Duplex
Digital input OPEN
Digital input CLOSE
10
half duplex
not inverted
not inverted
3.11.2 Schematics
This interface allows for remote operation by means of a command set based on the RS485 protocol.
In addition there are 2 digital inputs and 2 digital outputs. Digital inputs may be operated either by switches or by voltage
sources.
