Hi,

I have 1214 PLC. and photo electric sensor having 5KHZ output frequency used for calculating RPM of spindle.

Maximum RPM is 100000(1 lakh RPM).

While calculating using high speed counter i am getting RPM in terms of 60. Like 60 or 120 or 180 etc.

kindly suggest me how to calculate RPM with minimum count one RPM.

Thanks in advance

Hi paithankar,

in chapter 2.3.2 "Calculating the speed" of this example application there is a FB to calculate the RPM:
S7-1200: Application Examples for High-Speed Counters (HSC)

Thanks for the reply.

can u please help me about, how to add these FB in program....

i cannot find them.