How to measure Frequency (speed) using DP820
i do have an AC800M (Compact )having DP820 , it is required to maesure Speed(Frequency) of a line attached to Incremental encoder (250 pulse/rev) , i could read counted number of pulses but the freqeuncy all time equal (50.0) which is the 50% of the full scale , is thier is any setting need to be adjusted?
in the S800 i/o manual is talking about the freqeuncy is measured from that equation
where to find Fr , Sx and Sr?
I think I do find the solution for the above case
I did increase the maximum scale of the frequency from 100.0 up to 100000.0 , then I do find the signal that changed by the speed changing , by doing mask to the reading signal by number equal to 50% of the full scale I do mange to collect the signal I need (I my case the mask done by using 500000.0)
Hope it is useful