How to calculate frequency from counting pulses measurement

Pegaia

Hi,

Many times is necessary to measure frequency in industrial automation.

Normally it is done from a pulses generator signal. The S7-200 CPUs have high speed counters incorporated to do this task. The conversion counting pulses to frequency, however, must be done by user software.

Despites it is a not complicated evaluation, many users of S7-200 have difficult to implement it. Think in this case, I program an easy subroutine to do this calculation and a little text about theory and pratical implementation.

Attachment:Example.zip (511 Downloads)

Hello,

I'm not sure what kind of problem do you have. Please see the FAQ in the internet which describes the possibilities of migrations of STEP 7 project do you have. In TIA Portal you can use S7-300/400 and S7-1200.

http://support.automation.siemens.com/WW/view/de/56314851

With best regards
Cicero