Will USB-6251 execute multiple tasks at the same time?

[Bandit]

Hi all,

I have an application controling an experiment and logging data using a USB 6251. One measurement uses Two Edge Seperation , and takes a while to complete (20 to 30 seconds). Meanwhile I need to execute another task repeatedly to sense a digital input pin. Does anyone know if the USB 6251 can execute a second task while it's busy doing the edge seperation task? So far I haven't found anything in the documentation or on the forums.

BTW I can't just 'try it and see', or at least it's very tricky to do so. The control system is at the top of a scaffold tower, a long way from my development system. Every code change has to be deployed and installed to test it.

I recomend you avoid such an installation if you can  🐵  It makes for a tough time debugging.

Thanks for any help.

Bandit.

Message Edited by Bandit on 03-20-2007 12:05 PM

[YatinM]

Hi Bandit

I do not see why this should be a problem. You can execute two tasks together as long as they are not accessing the same channels or digital lines. When you execute a task it will 'reserve' the use of the specified channel or task. I f another task attempts to access this channel or line it will cause LabVIEW to throw up an error.

Hope this helps!

Kindest Regards

YatinM

NIUK & Ireland

Applications Engineer

[Bandit]

Thanks Yatin. It's always nice to get an answer, and even nicer when it's the answer you wanted to hear.

Best Regards,

Bandit.

[devchander]

A small addition to YatimM's answer

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You can execute two tasks together as long as they are not accessing the same channels or digital lines.

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For acquisiton on analog input channels, you cannot execute 2 tasks simultaneously even if they scan for 2 seperate sets of channels

For Ex: task 1: acquiring from analog channels 0 to 3 and task2 : acquiring from analog channels 4 to 6, will still give a 'device reserved' error, because a single ADC is available and used for multiplexing all channels in a task/ scan list and the second task will give up this error

[Bandit]

Thanks for that devchander, I don't think it's a concern in my application but I'll check through my code to make sure.

It's certainly worth bearing in mind in the future.

Bandit.