need help for s7-300

[tulip]

Normally we have got two crasher motors.We are giving frequency setpoint to one of them(1.crasher)for example 1000 rpm and current reading the other one(2.crasher).If reading current value has got high limit along 5 second time
(2.crasher) then frequency setpoint will decrease (1.crasher)for example 750 rpm.If reading current value within normal range then frequency setpoint will be first value (that is 1000 rpm).Thanks in advance.

 

[KalleOlsen]

I can see no question mark here. Is your problem to prog a comparator that shifts between 2 setpoints?
Kalle

 

[tulip]

Yes.I supposed that you understand what I meant.I wrote a prog.I simulated with plcsim prog.I could not understand sometimes is not working maybe due to plcsim version.