how does the DAQmx read.vi work in producer/consumer mode

[dffs]

Dear all,

I have one question: how does the DAQmx read.vi work in producer/consumer mode ? 

I mean if i set the acquisition samples quantity is 5000,(see the enclosed picture), how does the DAQmx read.vi acquire the samples ?

5000 samples one time ?

And how does the write. vi work ? Also 5000 samples one time ?

Look forward to your reply.

Thank you.

[crossrulz]

It will read 5000 samples per channel.

The Write Measurement File just writes whatever you give it.  It you send it 5000 data points, it will write the 5000 data points.

[dffs]

Hi crossrulz,

Yes, I think so that It will read 5000 samples per channel.

And I also think in the producer/consumer mode 5000*N samples will be stored in the stack.(N:channel quantity)

Am I right ?

Thank you for your reply.

[RavensFan · Accepted solution]

There is no "stack".

There is a queue.  Each element of the queue is going to contain whatever is sent to it on each execution of the Enqueue Element.  So if you are reading 5000 samples on N channels, and I see you have a waveform array,  Each element of the queue will contain a 1-D array of waveforms.  There will be N elements within that array, and the Y array in each of those waveforms will contain 5000 samples.