In article <7rtn3k$d3h$1@nnrp1.deja.com>, wrote:
> When I use the DIO Config VI the first time in LabVIEW, any I/O
>set-up as outputs momentarily turns-on. I am controlling relays with
>these outputs. Is there a way to prevent this momentary turn-on when
>configuring the digital I/O port?
I had a similar problem with the PC-OPDIO board. Might be due to
copying the i8255 PPI exactly, bugs and all. Or maybe just sloppy
programming in their drivers. Never got a solution from NI. Clue
for hardware makers: I/O lines should always stay in their power-up
state until the user deliberately changes them! (And should stay
the way the user left them after exiting, too!)
In my case, either the lines went from all high to all low spontaneously
when firing up Labview (actually, when loading any vi that used DIO
sub vis), or the lines stayed high forever because they couldn't be written
to! Depended on which version of NIDAQ was installed..... stupid.
Chris
