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Add channels of more than 1 DAQ to 1 task

Hi,

 

I have a question about adding channels of multi DAQs to 1 task

 

Let's say I have 3 DAQs on my chassis. Dev1,Dev2,Dev3

 

Can I add all the AI channels of 3 DAQs to 1 task so I can configure all 3 at the same time and and aquire data concurrently from all 3 from the same task. 

If it is possible then what DAQmx Write setting I should use? N channel N sample?

 

Thanks

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I think it depends on the specific DAQ device you are using, I think the higher end devices allow you to acquire from multiple devices in one task (I might be wrong) but on the lower-end devices you must start one task per device (or measurement type).

 

If you think about it, the timing/acquisition rates possible might be different on each device and the DAQmx driver would need to be able to collate all the results together from different devices.


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Hi Sam

 

Thank you for your response

 

The DAQs  I am using are all the same and they are PXI 6259. Do you know if I can group all teh channels to one task?

 

 

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Any help is really appreciated

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If you type the names of each device into a control, what error does it give you?

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Nope, that board will not let you put all three cards into a single task.  I've had to use multiple tasks, one for each card, on a similar card (same family).  X Series cards will allow multiple cards to be in a single task.  M Series does not.


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