Series 642
OPERATION
603685EA
Edition 2013-08-22
47/73
5.7
Operation during power up
Valve position
before
power up:
Reaction of valve:
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.
All other than closed
(not isolated)
Valve runs to max. throttle position to detect limit stop for synchronization.
Display shows configuration of product resp. ‘SYNC’ until synchronization is
done.
Valve position after power up is
closed
Valve position after power up is open
Refer also to chapter: «Display information».
5.8
Behavior in case of power failure
Valve position before
power failure:
Reaction of valve:
With Power Failure Option (PFO)
642 . . - . .
H
. - . . . . / 642 . . - . .
C
. - . . . .
642 . . - . .
U
. - . . . . / 642 . . - . .
W
. - . . . .
Any
Valve will close or open depending on valve configuration.
Default is close.
Provide that battery pack of the VAT controller is charged.
Display indicates
F
.
All parameters are stored in a power fail save memory.
Technical data of Power Failure Option (PFO):
Charging time
2 minutes max.
Durability
up to 10 years @ 25°C ambient
Refer to chapter: «Option board» for more details
