Manual

3.5.7 Optimization at the set-point for 3-point stepping controller
As position feedback is not provided, the controller calculates the actuator positi
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on internally by adjusting an integrator with the adjusted actuator travel time.
For this reason, precise entry of the actuator travel time (tt), as time between
stops is highly important.
Due to position simulation, the controller knows whether an increased or reduced
pulse must be output. After supply voltage switch-on, position simulation is at
50%. When the motor actuator was varied by the adjusted travel time in one go,
internal calculation occurs, i.e. the position corresponds to the simulation:
Simulation real position
Internal calculation tt
Internal calculation always occurs, when the actuator was varied by travel time
tt in one go
, independent of manual or automatic mode. When interrupting the
variation, internal calculation is cancelled. Unless internal calculation occurred
already after self-tuning start, it will occur automatically by closing the actuator
once.
Unless the positioning limits were reached within 10 hours, a significant deviati
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on between simulation and actual position may have occurred. In this case, the
controller would realize minor internal calculation, i.e. the actuator would be clo
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sed by 20 %, and re-opened by 20 % subsequently. As a result, the controller
knows that there is a 20% reserve for the attempt.
Operation
KS50/52-1 21 Self-tuning