DAQ analog inputs: is it faster to use single task with multiple channels (two to be exact) instead of two distinct tasks for 2 different channels?

[asdabir]

They are the same data type: voltage, and are on the same board with same max and min values etc. How much of a time overhead do these tasks generally incur? 

Thanks

Aditi

[Dennis_Knutson]

Since you simply can't use two different tasks at the same time, your question does not make much sense.

[IUCHEM]

I have previously used created and run two tasks at the same time but I realize now that they were probably not running "simultaneously". However My program seemed to work oK. Do you think this was because the timescales that I was updating the measurements were in 100s of milliseconds and the time that was spent switching between tasks was too small to notice?

[crossrulz]

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@IUCHEM wrote:
I have previously used created and run two tasks at the same time but I realize now that they were probably not running "simultaneously". However My program seemed to work oK. Do you think this was because the timescales that I was updating the measurements were in 100s of milliseconds and the time that was spent switching between tasks was too small to notice?

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1 Sample On Demand?  That would probably work.  But I would say you just got lucky.  You would be much better off using a single task to read both channels.  It is just more efficient in many ways.