How to avoid cumulative buffered edge counting

[GiangV]

Hi!

When I performing buffered edge counting with NI-6602 and Labview 8.2 I encounter 3 problems.

1) The firs value is not correct, I have read from this problem from NI homepage http://digital.ni.com/public.nsf/allkb/8579D7E5CD494D9F86256B3E005798C2

    it said I need to dicard the first value, but how do I do that?

2) What can I do to avoid the cumulative counting? Right now it add number of pulses with the previous value, see the figure below

I want program to do like this, look next figure

of course without the first value.

3) The counting roll over so the values in the vector adding number of pulses continuously.

Best Regards,

Giang Vu

[Kevin_Price]

1.  The simplest way is to use one of the 1D Array functions to Delete element #0.   (Or use Array subset with start index=1 and leave the length unwired).

2. You need to perform Period measurement (not edge counting) to get the behavior in the 2nd diagram.

3.  Sorry, I don't think I understand this question.

-Kevin P.

[GiangV]

Hi Kevin P!

Thanks a lot, I'm sorry didn't explain clearly about number 3 but now I will try to do as you told me, maybe it will solve number 3 as well. I will let you know if I have problems with that or not.

Thanks again

Sincerely

GiangV