If the control value 0% is only rarely achieved in ongoing operation, this can lead to inaccuracies in
positioning control. This parameter activates automatic adjustment to move the valve drive in a defined
manner to the 0% position. This serves as the basis for position adjustment.
Selection of option Yes:
Dependent parameter:
Number of changes until adjustment
Automatic adjustment/reference adjustment
The adjustment counter is incremented by 1 at the end of a drive adjustment.
If the parameterized number of valve controls is reached, the reference adjustment is started.
The closed position (independent of the characteristic curve) is then exceeded by 5% of the
parameterized switch on time for the control value, based on the last control value (at least 1
second, no more than 60 seconds). This function cannot be interrupted! Thereafter, the currently
calculated valve position is approached, and the adjustment counter is set to zero.
The following events trigger a reference adjustment.
Bus voltage recovery
ETS reset
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Reset of a remedied fault (via button or via communication object Reset fault)
Long button push (>2s) on one of the buttons B or D triggers a valve reference movement
for the valves
Reaction on control value 0%
With a control value of 0%, the valve drive (independent of the characteristic curve) is fully
closed.
The closed position (independent of the characteristic curve) is then exceeded by 5% of the
parameterized switch on time for the control value, but not for longer than 1 minute.
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