Series
100/129
Edition 2019-05-03 963283EA
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.
5.7 Operation during power up
Valve position
before
Valve power up configuration = closed
(default)
Valve power up configuration = open
Closed (isolated) Valve remains closed.
Display shows ‘C C’.
Homing will be done when first
movement command is received.
Valve runs to maximum throttle position
to detect the limit stops to do homing.
Display shows configuration of product
resp. ‘Ho’ until homing is done.
Valve position after power up is
‘A. 0’ min. conductance.
All other than closed
(not isolated)
Valve runs to max. throttle position to detect limit stop for homing. Display shows
configuration of product resp. ‘Ho’ until homing is done, and afterwards to close
position. Display shows ‘C C’.
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:
Without Power Failure Option (PFO)
653 . . - . . G . - . . . .
653 . . - . . A . - . . . .
653 . . - . . T . - . . . .
653 . . - . .
. - . . . .
With Power Failure Option (PFO)
653 . . - . . H . - . . . .
653 . . - . . C . - . . . .
653 . . - . . U . - . . . .
653 . . - . .
. - . . . .
Closed (isolated) Valve remains closed.
Valve will close or open depending
on valve configuration 1).
Default is not defined.
Display indicates F.
Valve open or in any
intermediate position
Sealing ring moves down and blocks
the pendulum plate at the current
position.
1) Provide that battery pack of the VAT controller is charged. Charging time after power up is 2 minutes
max..
All parameters are stored in a power fail save memory.
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