Error 200288 in Loop

[M.Mei]

Hi all,

I am trying to do scanning with a trigger, so created three channels with three waves generating at the same time. This program works well if it only run once, but get an error-200288 (atttemped write a sample before the final sample generated) in loop.  I think I should put some flag to make sure all the sample generated before writing, but I do not know how to do this. Or this is wrong?  Can anyone help?

The VI is attached.

Thanks,

Mei

[KevinBPunkt]

Hi,

maybe the following link can help you:

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019O31SAE

Regards,

Kevin

[M.Mei]

Hi Kevin,

Thanks, I tried according to this link before, but it does not work, maybe I misunderstood the explanation, can you explain more clearly?

Thanks,

Mei

[KevinBPunkt]

Hi,

I think the error occurs, because the loop ends, although the DAQ action isn't finished yet.

I haven't worked too much with DAQ, you could try to add something like a 'stop routine' (when stop is pressed, stop the entire DAQ action)

Regards,

Kevin

[crossrulz]

If you are trying to continuously output a voltage, then your timing mode should be Continuous Samples.  I would also unwire the Number Of Samples input to the DAQmx Timing VI since you usually limit your buffer when you do wire it up.