Velocity gate

[Neil_Helsel]

Hey guys.

I am trying to use LabVIEW to display velocity of a projectile through the use of a digital signal from the NI 9401 on the cDAQ 9174 chassis. I have a Omron E3X-MDA digital fiber sensor that is set to spike when something breaks the laser. I'm having trouble getting LabVIEW to display any data concerning this.

Can anyone point me in the right direction on using DAQmx on labview with a digital signal, because it seems harder than with analog.

Thanks

[crossrulz]

Since you are looking at two signals, I would look at using a counter.  If you look in the example finder (Help->Find Examples), you should be able to find a good example on using the counter to get the time difference between the channels.

[Neil_Helsel]

In MAX i can see that the device is detected. I'm not to sure how to export the data to a graph where I can see the spikes. The only options seem to be arrays.