sync usb 6509 with usb 6255

[Rsilva]

Hi folks.

I'm trying to sync digital output for multiplexing purposes and acquiring analog signals (voltage) for each address.

However I keep getting error 200278 and others similar.

And when I don't get an error message, the output files always have the value for the last iteration in the For Loop.

Is there a way to sync the digital and analog boards? I have seen other tutorials but the problem is that the USB 6509 has no PFI lines.

Can I use the Start.vi and some structures to sync?

I have attached my vi.

Hope someone can help.

Rui

[Rsilva]

Anyone? I'm really stuck in this matter!

[Remi.D]

HI Rsilva,

First of all, error 200278 is due to the use of a finite acquisition task in a loop. I encourage you to read the information presented from the following link, which allows you to understand and correct this error:

Error -200278 at DAQmx Read

http://digital.ni.com/public.nsf/allkb/4159A4241B8A24B3862570EC007AB6B7?OpenDocument

Since 5609 does not support timed digital generation, it is not possible at once to ensure perfect synchronization of digital I / O on both cards at the same time. Therefore you can generate samples on request at the same time, and you'll be depending on your OS.

Best regards,