Under VI

[Jeremie.D]

HI. For more easy, I join you my VI so that you can manipulate.

I need to recover temperature and tension values at the same time. So I create 3 VI who I add in a big one. All VI works corretly, but when I gather it in the big one, they don't turn at the same time, and that brake my VI.

First VI going to create a graph, where I can see all of my thermocouples. I set a sampling frequency just for him.

Also, I want to recover some températues. Tipically, I see each secondes the températures in my graph, but i want to record every 5 secondes. So i set a new sampling frequency. It's the role of my second VI.

The last displays and records tension values, with the time, in a EXCEL file. I have the same sampling frequency for displaying and recover values.

So now, I just want my VI turns to infinity
Thank you for you answer.

[crossrulz]

1. You did not include the subVIs, so we cannot troubleshoot.

2. What hardware are you using?  You may be able to combine the temperature and tension readings into a single task.

[Jeremie.D]

I use :

-Ni 9214 16-CH Isothermal TC, 24-bit C ( thermocouples )

-NI 9205 16 bits, 250kech/s, +/- 10V, 16 voies differential

[crossrulz · Accepted solution]

Seeing that the sample rates are all the same and with the assumption both modules are in the same cDAQ chassis, just combine all of your readings into a single task.  You can then use a Producer/Consumer setup to send data to parallel loops for the processing and saving of the data.

[Jeremie.D]

I have two sampling frequency :

- One to have the temperatures in a graph, and for the measurements of voltages
- Another to save temperature values in an EXCEL array.

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crossrulz a écrit :

You can then use a Producer/Consumer setup to send data to parallel loops for the processing and saving of the data.

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What is the PRODUCER / CONSUMER configuration?

[crossrulz]

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@Jeremie.D wrote:

I have two sampling frequency :

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Your code currently has both running at 1 sample per second per the inputs to the DAQmx Timing.vi

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Jeremie.D wrote:

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crossrulz a écrit :

You can then use a Producer/Consumer setup to send data to parallel loops for the processing and saving of the data.

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What is the PRODUCER / CONSUMER configuration?

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Follow the link I provided

[Jeremie.D]

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crossrulz a écrit :

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Your code currently has both running at 1 sample per second per the inputs to the DAQmx Timing.vi

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It's just that the commands did not save, but I still have 2 separate sampling frequencies. Do I have to create 2 tasks?

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crossrulz a écrit 

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Follow the link I provided

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Thank you

[Jeremie.D]

OK, I think I understand thank you