SEARCH ARRAY AND COUNT TRANSITION FROM HIGH TO LOW

I have 4 dig inputs. I want to count the number of times each individual input transitions from high to low and display the count I attached the vi as v11. Thanks for any help.
Solved!
Go to Solution.
Attachments:
count.PNG ‏94 KB
9422_Digital_In_mod.vi ‏52 KB

Hello Jootbox,
Are you by any chance using a cDAQ 9181 chassis?
If you are it might be a good idea to use the 4 counters internally available on this chassis.
A simple example about counting edges can be found over here:
https://decibel.ni.com/content/docs/DOC-11412
Kind Regards,
Thierry C - Applications Engineering Specialist Northern European Region - National Instruments
CLD, CTA
If someone helped you, let them know. Mark as solved and/or give a kudo.

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In my configuration I use some analog inputs from a USB 6259 with 20kHz samplerate and two counter inputs for frequency measuring via DAQmx in DIAdem DAQ.
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The other problem is the display and the measurement of the frequency itself. If i check the function of the counter input in the Meas. & Automation Explorer the frequency is display correct without any dropouts or something like that. The signal I measure in DIAdem on the other side looks quite bad because there are spikes of some MHz and even more although the measured range is between 20 and 80Hz!
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Regards
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Attachments:
probs.png ‏112 KB

Hi there,
it seems that german is your mothertongue, so I'll reply on german.
Digitale Eingänge müssen Software getaktet werden, da nur analoge Eingänge Hardware-Takt Unterstützung haben!
Sie können den Hardware-Takt nur mit analogen Eingängen einsetzen, die, von einem Timer gesteuert, gepuffert Werte einlesen können. Digitale Größen verarbeitet der Hardware-Takt nicht.
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[email protected] (H) wrote in message news:<[email protected]>...
> I have an array in a column that I extracted from a data file. I want
> to search the array for particular values and return the index which
> is easily implemented by the search 1d array subvi. However, when I
> input the values to search, it returns a -1 for some values and others
> it finds fine where I know all the values exist. To be more precise,
> my array is about 80 values between -2 and 2 in steps of 0.05. When I
> search for -2, -1.5, -1, etc., I get the correct index. When I
search
> for other numbers like -1.8, -1.7, -1.85, etc., I get a return value
> of -1. It is really strange and I am not sure of the problem. Anyone
> have any ideas? Does it have anything to do with the precision or how
> I read the spreadsheet file to extract the column?
>
> Thanks
> Heather

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SEARCH ARRAY AND COUNT TRANSITION FROM HIGH TO LOW

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