Travel Adjustment; Idle Time During End Position Guiding - Samson 5824 Mounting And Operating Instructions

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
performed after every start-up to obtain a reference value for the zero point. The position
feedback indicates the position of the actuator stem.
− Relative travel adjustment
The relative travel adjustment causes the change in input signal to be reproduced by the
position of the actuator stem. The actuator stem extends or retracts from the current actu-
ator stem position corresponding to the change in signal. After starting up the actuator, a
zero calibration is not performed. The stem position is unknown when starting operation.
The input signal is assigned in this case as the start value. The position feedback indi-
cates the actuator stem position in relation to the start value.
Settings\Actuator\Travel
Function
Travel adjustment
Tip
In closed-loop operation, the positioner must be operated with absolute travel adjustment
(default setting).

16.5.3 Idle time during end position guiding

The idle time for relative travel adjustment paces the gradual movement of the actuator stem
towards the end position.
With the relative stem position, the input signal can preset a value of 0 % or 100 %. Howev-
er, the actuator stem can only be moved to its upper range value. The input signal cannot
move the actuator stem beyond this position. The actuator stem is moved towards the end po-
sition in steps with the hysteresis. The idle time defines the time between the steps. The paced
stem movement is deactivated when the value is set to 0.
EB 5824-2 EN
Annex A (configuration instructions)
WE Adjustment range
Absolute Absolute/Relative
16-5