hi,how do i achieve synchronous continious analog i/p acq b/w four E-series cards using labview RT?

[devchander]

hi,how do i achieve synchronous continious analog i/p acq b/w four E-series cards using labview RT?.
I tried following.
1.Configure devices outside a while loop and read all four in a single loop.it works for low scan rates.Is this an advisible method?
2.Nxt, i tried seperate acq loop for each card on single VI,the result was a recognisable lead/lag between each set of data.
One labview example code does shared scan clk finite acquisition using rtsi.Can it be extended for continous acquisition as well?If so can you please tell me how to achieve it or can you share the code?
thanks in advance,
Dev

[sergesl]

Hello Devchander

If I understand well, you are trying to read simultaneously from four E-Series cards using LabVIEW RT. If you synchronize the four boards using RTSI Bus and read from the devices in parallel loops, it should work. You are probably getting the lead/lag because your boards are not synchronized. Please try that and let me know.

Serges Lemo
Applications Engineer
National Instruments