Figure 45: Closing using the frequency converter
The frequency converter starts door movement with start ramp "r5". It accelerates from 0 Hz to
the max. travel speed.
The door is moved at the max. travel speed until the pre-limit switch for limit position CLOSE is
reached. At this point it reduces the speed of the door to creep speed using ramp "r6”. The door
now moves at creep speed until the limit switch CLOSE is reached.
At this point the door is stopped (ru).