Installation, Operating & Maintenance Instructions
Series 612 DN 63-250 (I.D. 2.5“ - 10”), 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
289857EA
2011-07-13
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For LOGIC I/O connector schematics see also chapter «LOGIC I/O».
3.6.3 Valve and sensor configuration
Basic valve configuration must be adapted according to application needs.
•
Definition of valve plate position (CLOSE or OPEN) after power up sequence. Default is ‘close‘.
•
Definition of valve plate position (CLOSE or OPEN) in case of a power failure. Default is ‘not defined‘.
•
Only for versions that have Power Fail Option equipped [612 . . - . . H . - . . . .; 612 . . - . . C . - . . . .].
•
ZERO function: This may be ‘disabled’ or ‘enabled’. Default is ‘enabled‘.
Refer also to «ZERO».
•
Sensor configuration for 2 sensor version [612 . . - . . . K - . . . .].
Refer also to «Pressure control operation with 2 sensors».
Local operation
:
(‘Control View’, ‘Control Performance Analyzer’ or
‘Service Box 2‘)
Remote operation
:
(Refer to chapter «RS485 setup commands» for
details)
1. Do power up configuration in menu
‘Setup / Valve’.
2. Do power fail configuration in menu
‘Setup / Valve’.
1. Send VALVE CONFIGURATION
3. Enable or disable ZERO function in menu
‘Setup / Sensor’.
4. Do sensor configuration in menu
‘Setup / Sensor’.
2. Send SENSOR CONFIGURATION
3.6.4 ZERO
ZERO allows for the compensation of the sensor offset voltage.
When ZERO is performed the current value at the sensor input is equated to pressure zero. In case of a 2 sensor system
both sensor inputs will be adjusted. A max. offset voltage of +/- 1.4 V can be compensated. The offset value can be read
via local and remote operation.
Local operation
:
(‘Control View’, ‘Control Performance Analyzer’ or
‘Service Box 2‘)
Remote operation
:
(Refer to chapter «RS485 control commands» resp.
«RS485 setup commands» for details)
1. Send
OPEN
VALVE
2. Wait until process chamber is evacuated and
sensor signal is not shifting anymore.
Go to menu ‘Zero / ZERO’ and follow instructions.
3. Send
ZERO
