I ran your VI.
You are collecting 500 samples at a 100 Hz rate which means the loop will take 5 seconds to run. That is going to make the program feel unresponsive. I would set it for more like 100 samples at the 100Hz rate.
You have the wrong mechanical action for your stop button. Do not use Switch until released. Set it for Latch when released. I couldn't figure out how to stop your program. Eventually I figured out I had to hold the stop button down for at least 5 seconds until the loop iterated again to be sure that the Stop button was actually read as true.
Why are you using index array to get 4 waveforms (although you only have 2 channels) then proceed to build them back up again into a 1-D array of waveforms. You wind up with the same 1-D array of data coming out as you had going in.
If you use Index Array like you add it, there is no need to wire the indices, it will automatically give you 0, 1, 2, and 3. Defaults start at 0 and increment by 1 from there.
(Pink buttons on blue background, kind of odd. Normal LabVIEW grey colors, or using system controls and colors would look better.)
Please save your VI so the windows are actually onscreen. Do you have a dual monitor setup? I am guessing so because one of the VI's showed up way off screen to the right making it hard to get back.
I ran your VI for a while and got about 3000 rows in the data file. I ran your display VI. Do you mean you actually saw about 1000 points on your waveform chart and not 100? The chart history is set to show 1024 points, so you'll only see the last 1024 datapoints. You can set the properties of the chart to show more if you want.
