synchronized analog output - two cards

[MK_MTEngineer]

Hello everybody! I´ve a little or big problem - I want to generate three different waveforms (for example three sine signals @ 10, 100 and 500 Hz) - two from a PCI-6110 and one from a PCI-6711 card. Is there a possibility to generate not only one of them clocked at one time so that i can simply connect my generated waveforms with the channel write function? If not can you imagine a (simple) method to solve the problem?

Thanks!

Michael

[MK_MTEngineer · Accepted solution]

Any idea?

[Duffy2007]

Hello MK_MTEngineer

i think this should help you

NI-DAQmx: Synchronize Analog Output Across Multiple Devices Using LabVIEW 

then you have only to build the waveform.

Two Analog Output Waveforms With Different Frequencies and/or Different Waveform Types

Have you connected an RTSI cable between the two cards?

Which driver and LabVIEW version do you use?

[MK_MTEngineer]

Thanks for your reply... i already found this solution. The problem in my case is the data structure, where i have one voltage per task. When i put the two voltages of the master device in one task it works fine. I have to change my pretty typedef i made ... :(. Is it possible to activate two tasks on one card simultaneously?! Resources would be blocked, aren´t they?

[Duffy2007]

Hello MK-MTEngineer,

you can only run one task for analog output for one card.

So xou have to calculate the waveforms before you put it out.