What is the easiest way to get time stamped wvm data with AI samp Ch Vi?
The AI sample channel VI only outputs single point waveform data which is making it a beast for me to get my input data into XY graphs. I have been trying to combine the data with a elapsed time clcok so I can synchronize all my inputs but it isnt working too great. All this stuff is in a while loop also, so that gives me trouble. Basically I just want to make an XY graph from both AI inputs.
Attachments:
PID_Control_LoopII.vi 326 KB
Tim, no problem. I have attached the modified code that displays the readings from both devices on the same plot. I used a chart instead of an XY graph since it is much easier to use (it keeps track of elapsed time for you if you know the amount of time in between data points - and since the loop time is fixed we do know that). If this time were to change, then we would have to re-create the X-axis (time) and the XY graph would be necessary. One other note - the code that reads the values from the DAQ cards will not execute at exactly the same time, therefore the data will not be acquired at exactly the same time, though it will be close. Therefore, if your application requires these readings to be dead on together in time down to the mi
crosecond for example, then you would have to synch the two devices via hardware. Let me know if you intend to do that and I can steer you in the right direction. Hope this helps.
Attachments:
PID_Control_LoopII_rev_2.vi 89 KB
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