Ladder Logic: Scale with parameters

The use of the limit instruction I posted will not move the speed to zero if the number is out of range. It will do nothing. As the rung will be false, no change will occur it will just stay put at whatever value is there.

But do whatever you are comfortable with.


I see; so, there's no need to change the program further because being out of range will simply leave it in the last commanded speed - Excellent. Again, your help is greatly appreciated.
 
Hi,I have a proximity sensor that will count the speed/rpm of a machine. can this be possible to use a digital input module (siemens plc s7300)and have it program to read the rpm/speed on the tp170HMI? any example please? thanks

Hey bud, instead of replying to an existing question please start a new one with your question and we'll be glad to help. ;)

What you are asking for is very easy to do.
 

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