Table of Contents
Advertisement
Annex A (configuration instructions)
16.4 Blockage
16.4.1 Blocking protection
The blocking protection prevents the valve from seizing up. If the actuator stem is in the lower
end position (0 %), it is extended slightly and then moved back to the closed position 24
hours after it last moved.
Movement of the actuator stem caused by the activated blocking protection is indicated by
the yellow LED:
ON
OFF
2
Settings\Actuator\Blockage
Function
Blocking protection
16.5 Travel
16.5.1 Limited travel range
The 'Limited travel range' parameter determines in % how far the actuator stem can move at
the maximum. The travel determined during initialization acts as the reference.
Settings\Actuator\Travel
Function
Limited travel range
16.5.2 Travel adjustment
Travel adjustment can be made to be absolute or relative. The way the travel adjustment is
made affects the control behavior.
− Absolute travel adjustment:
The absolute travel adjustment causes the actuator stem to move to the actuator stem po-
sition determined by the input signal. To achieve this, an automatic zero calibration is
16-4
6
4
10
8
WE
Adjustment range
No
Yes/No
WE
Adjustment range
100.0 %
30.0 to 100.0 %
Time in s
EB 5827-2 EN
Advertisement
Table of Contents
