Demande d'aide LabVIEW pour projet

[waldoemerson23]

Bonjour. J'ai déjà fait mon programme LabVIEW pour récupérer le couple, la vitesse et la température d'un moteur. J'utilise la carte NI USB-6211. Mon problème est que je n'arrive pas à récupérer toutes les valeurs à la fois alors que j'utilise des entrées analogiques différentes pour chaque grandeur physique. Voici l'erreur qui s'affiche: La source spécifiée est réservée!

[Kevin_Price]

[Hopefully you can translate this back to French and it'll make enough sense.] 

The device only has 1 timing engine available to drive AI sampling, so you need to have just 1 task that includes all the AI channels.  You can chain several calls to DAQmx Create Virtual Channel in a row, one for each channel you need to configure uniquely.  Be sure to wire each 'task out' terminal to the next 'task in' terminal.

Note that one consequence of this is that all channels will be acquired at the same sample rate.

-Kevin P

[ZYOng]

To top up what Kevin_Price has shared, see Easily Synchronize and Trigger NI-DAQmx with Channel Expansion

[waldoemerson23]

Hi Kevin thank you for your response. I understand what do you mean but can you show me a simple example please?

[waldoemerson23]

Thanks a lot!

[GerdW · Accepted solution]

Hi waldo,

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@waldoemerson23 wrote:

I understand what do you mean but can you show me a simple example please?

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See this:

[waldoemerson23]

Thank you so much it is very helpfull. Now to retrieve the data of each entry on different displays how to do it?  

[GerdW · Accepted solution]

Hi waldo,

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@waldoemerson23 wrote:

Now to retrieve the data of each entry on different displays how to do it?  

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Use one DAQmxRead call to read all channels (mode "N channels").

Then use IndexArray to get the elements/channels for each display…

[waldoemerson23]

thanks!!!