Acquiring more than 8 bits digital data from PXI-6221

[ErdenV2]

Hello,

I am trying to acquire data and write to the disk with PXI-6221. I am using "Digital - continuous input.vi" example. I created a sample clock task and added (see attachement).

I am selecting multiple channels. If I seleck only port0 bits, it works. If I include any of port1 or port2 bits, I get error -201062: "Possible reasons selected lines do not support buffered operations"

What is the proper way to acquire data including from port1 and port2?

Thanks in advance!

[johnsold]

The 6221 only supports timed digital (or waveform) I/O on port 0. The other ports can only be read as software timed.

One possibility would be to read the other lines as analog inputs. After reading compare the values to a threshold to convert to a binary signal. This will be limited by the 250 kS/s aggregate sampling rate for AI.

Lynn

[ErdenV2]

Hi Lynn,

Thanks a lot for the quick reply. It is clear now. 

All the best,