Installation, Operating & Maintenance Instructions
Series 650 DN 350 (I.D. 14”), CC-Link
VAT Vakuumventile AG, CH-9469 Haag, Switzerland
Tel +41 81 771 61 61 Fax +41 81 771 48 30 [email protected] www.vatvalve.com
286241EA
2010-10-11
30/86
3.1.7 Safety
mode
By means of an external switch (see connection diagrams «Electrical connection») the motor power supply can be
interrupted. In this case the valve enters the ‘safety mode’. This motor interlock prevents the valve from moving (e.g.
maintenance work). Data reading from the control unit remains possible.
When motor interlock is active during power up the valve directly enters the ‘safety mode’ and is not able to synchronize.
Display shows ‘D C’ or ‘D999’. In this case synchronization cycle will be done when motor interlock is deactivated. Then
Display shows ‘INIT’ for a moment followed by ‘SYNC’.
When ‘safety mode’ is entered from operation (i.e. pressure control mode), the unit will automatically switch to position
control mode and remain at current position. Once motor interlock is deactivated the unit remains in position control mode.
3.1.8 Service
indication
This product is able to indicate that the valve unit needs to be cleaned, or an obstruction is present.
A service request is indicated when the control unit detects that motor steps are apparently not effective. This may happen
when the valve unit is heavily contaminated. These ‚lost‘ steps are recognized and will be repeated to attempt target
position in the short term. But in the medium term the valve unit requires cleaning or inspection.
‘Service request’ (SR) would be indicated on the display or could be read via remote operation. Refer to «Display
information» for details.
3.2 Operation under increased temperature
Hot valve
Heated valve may result in minor or moderate injury.
Do not touch valve and heating device during operation. Once heating is switched off
(valve and system) await until the valve is cooled down complete before doing any
work.
This valve may be operated in the temperature range mentioned in chapter «Technical data».
3.3 Behavior during power up
Reaction of valve:
Valve position before
power up:
Valve power up configuration = closed
(default)
Valve power up configuration = open
Closed (isolated)
Valve remains closed.
Display shows alternately ‘C C’ and
‘INIT’.
Synchronization will be done when first
movement command is received.
Valve runs to max. throttle position to
detect the limit stops to synchronize.
Display shows configuration of product
resp. ‘SYNC’ until synchronization is
done.
Valve position after power up is open.
Valve runs to max. throttle position to detect limit stop for synchronization.
Display shows configuration of product resp. ‘SYNC’ until synchronization is
done.
All other than closed (not isolated)
Valve position after power up is closed Valve position after power up is open
Refer also to chapter «Display information».
