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Split from CALCULATE RPM.

Vishaljp

I have a Digital Input, which turns on and off. I want to count RPM from its frequency.

More details please.

Which PLC?

The information is scarce to give a specific answer but here here is a bunch of reading that may be helpful.

Calculation Example

A DIGITAL INPUT SWITCHING ON AND OFF SIMULTANEOUSLY. I WANT TO CALCULATE ITS SWITCHING FREQUENCY.

Mister T

Hello,

you have to think about, how many pulses do you get per revolution...

For calculation:

• 150 revolutions/minute = 150 revolutions/(60 seconds) = 2,5 revolutions/second
• If you get one pulse per revolution: 2,5 revolutions/second = 2,5Hz

 1 PULSE PER REVOLUTION