Synchronization of two S-serie card and while loop

[damien.gillieron@epfl.ch]

Hello,

I'd like to acquire signals from two different S-serie card. The PCI-6115 is the master card and the PCI-6143 the slave one. I have also a RTSI cable.

I tried the.vi without the while loop and it works well. Is there a problem with the triggering or with the "Daq-mx read.vi" when using finite samples.

I tried also the .vi called "Multi-Device Synch-Analog Input-Cont Acquisition.vi" in the NI Example finder and it works. Therefore, I need finite sample in my application.

Thank you very much.

[AlexxxR]

Hi Damien,

from your description is hard to recognize, so I ask you at first, do you want to do something like Retrigger?

Because when you want to acquire "finite Samples" you don´t need a while loop and then the problem comes from NI-DAQmx when you want to read a second time!

Perhaps you should program something like a state machine!

1. Initialize Program

2. Configure Acquisition

3. Acquire Finite Samples

4. Analyze or Filter

5. Save to disk

6. End Program or go back to Configure Acquisition

This is much better than a huge Sequence Structure. Have a look at the Template Browser.

And: you have two times the Dev1 for Master and Slave in your program. I think this is wrong.

Regards

Alex Rudolph

NI Switzerland