George3

Hello,

I am making a program for LOGO, which will calculate RPM variation of a motors which we test.  This way we can detect some problems with gearbox, etc..

I used RPM analog output  0-4V  of the frequency drive as feed for the LOGO.

Program is attached. I used ANALOG comparator to calculate the RPM variations for the last 1 second. Then RPM variation is shown on  display.

But there are more ways how to do this- for example using Mathematical instruction., etc

Is this the best way considering  advantages/disadvantages - or anyone have any ideas ?

Thanks

The attached program is not yours, it is from me.
See this topic:

Can I measure -4V to +4V with Analog input of LOGO ?

In this attached program I don't see any analog comparators.