How to convert the counter input as a RPM

Hello NI,
Could you tell me. how to convert the Counter input to the RPM. I am using Rotary encoder has a 5V amplitude with 500 PPR. i am going to measure the Engine speed as a rpm.
I am using third party hardware, from the hardware i can get the Count as well as Frequency also.
Could you suggest to me...? i looked out some disscussion in these forum but i cant able to understand.
can you please explain with simple way....
if you have any simulation send me....
Regards,
Balaji DP

Hi balaji,
[email protected] wrote:
...I am using third party hardware, from the hardware i can get the Count as well as Frequency also.
If you're able to read frequency as X pulses/sec(?) that seems to convert RPM as follows:
X (pulse/sec) * 1/500 (rev/pulse) * 60 (sec/min) = X * 60/500 RPM (???)
Cheers!
"Inside every large program is a small program struggling to get out." (attributed to Tony Hoare)

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