External and embedded parallel sampling

Hello everyone,

I made a simple example to show what I'm trying to achieve, but my problem comes down with a question: is it possible to have in parallel a task this channel to AI0 samples with the clock on board and another task this channel of AI1 samples with external clock source?

In my application, I have
(1) a single measurement task lets say pressure or temperature on a channel with the on-board clock
(2) try a calculation of the frequency of the revolutions of the differential sensor (IRC)
(3) a single signal of sampling of the task of the probe laser using the IRC signal as external source

They are meant to operate in parallel

2 + 3 works perfectly, but when I also add 1 I get the error-50103 occurred to DAQmx start Task.vi:1, is reserved for the specified resource. The operation could not be performed as indicated. Also 1 + 2 works perfectly together. Attached program - it's just quick example.

Thank you very much

Trying to create more than one task, the AI, the same time result in the encountered error message... This is because the AI can have only one example of clock source. As a result of access to the device, it is a sine qua non for a single device. Having more than one DAQ hardware will allow you to set two different clocks for both devices.

hope this helps,

Norbert

Tags: NI Software

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