External trigger for internal event

Question

Hello,
I would like to use an external trigger on a PFI-line to trigger an
internal event, e.g. the switch of an indicator on the front panel from
"1" to "2".
How do I do that?

Answer 1

Thanks for your answer!
The problem was that I wanted to use a PFI-line on a PCI-board
(BNC-2110) from NI to trigger the start of a voltage output task. On
the other hand, I wanted to use the same trigger event for stopping a
while-loop which would otherwise abort the task after some seconds if
the trigger didn't come; the data generation itself is rather long, so
you have to set the "timeout" terminal of "DAQmx Wait Until Done" to "
-1". The problem was that it is not possible (at least on this board)
to use a digital in-line for triggering the task and the PFI-line for
getting a digital input. So I splitted the signal up: it was weird to
both lines and worked as trigger on the PFI and was monitored on a
DI-line.
This setup worked, but as there were still some problems, I changed it
again. Now I check for some digital in-lines (which provide a stimulus)
in a while-loop while waiting for the trigger; if the stimulus changes,
the task (which is waiting for the trigger) is aborted. The problem is
that if the stimulus doesn't change and the task is triggered as usual
and is completed, I can't report that fact to the while loop! So the
while-loop goes on and blocks the rest of the diagram. I just wrote
another posting concerning that thing, if you would have a look... It
can be really a little hard sometimes, can't it...
This thing concerning the event structure and value (signaling) sounds
interesting, I'm just trying to figure out the possibilities how to use
an event structure; but it's not always really intuitive.
Best regards,
Mitja
Message Edited by Mitja on 11-14-2005 07:09 PM