Hello Ahmad;

You do not give details on the CPU you are using for this project. Since you are posting on the S7-200 conference, here is a sample application for Microwin:

How to calculate frequency from counting pulses measurement

If you are using a different PLC, you can search for other samples by using the search box at the right of this page.

Hope this helps,

Daniel Chartier 

dchartier

Hello Ahmad;

You do not give details on the CPU you are using for this project. Since you are posting on the S7-200 conference, here is a sample application for Microwin:

How to calculate frequency from counting pulses measurement

If you are using a different PLC, you can search for other samples by using the search box at the right of this page.

Hope this helps,

Daniel Chartier 

 thank you

am sorry