Interruptions when I use "Write" and "Read" in the same vi.

Question

When I use "Port Write" and "Port Read" together in the same vi and I set the output to be high level, the signal becomes oscillatory. I have read one anterior message about similar problem (using "Write to Digital Line" and "Read from Digital Line" instead of "Port Write" and "Port Read") and I proceeded as the solution suggested in the answer. However, it didn´t work.
Attached, I am sending the vi I used to test the solution.
How can I fix this problem?
Attachments:
IO.vi ‏35 KB

Answer 1

Hi Spencer!
The device I am using is a PCI6024-E board. I have contacted the NI Suport and now I see what I was doing wrong: in fact, I was calling a DIO Port Config.vi for each of the ports ("Port Read" and "Port "Write"), but it was done inside of a While loop (usually, most of the applications here in the lab are recursive, so it´s common for us to use big while loops for the whole program). Putting them outside (as you said, at the beginning of the program), it worked! Actually, I can´t see any reason for the program to work when the calling is outside the loop, but the important is that now it´s running properly.
Thanks a lot, Spencer!