Start Trigger M Serie C++

[Sebastien Dupere]

Hi, I seem to have uncover a bug in my C++ when I tried removing some cards:

Usualy, I sync every task to a master task and THAT task is linked to the  NISYNC_VAL_PXITRIG0 by using DAQmxCfgDigEdgeStartTrig

Now it worked fine because my master task was a S serie, but when I made my master tasks M and Signal Acquisition serie, they never start.

And yes I did some tests on the S serie (link it to a NISYNC_VAL_PXITRIG1 to watch it freeze...to make sure it was indeed listening to the trigger signal)

Also, if I do remove the start trigger from NISYNC_VAL_PXITRIG0 it works like a charm...

Finaly, every task is linked to the master task by its  "/ai/StartTrigger" and it works fine....

So only NISYNC_VAL_PXITRIG0 is an issue.....is it because some slots don't receive the signal sent by PXI_Trigger or something?
Should I use the STAR version instead? (Using a timing card in slot 2)

[ManLongAtNI]

Hi Sebastien,

 NISYNC_VAL_PXITRIG0 should be a valid source terminal for trigger connections. I recommend using a STAR line and see if it simulates the same bahviour.

[Sebastien Dupere · Accepted solution]

Well after trying it this sunday...

I noticed that all my issues were gone if instead of linking it manualy to trigger lines I would let the chassis automaticaly link everything like so:

(not actual code but more of a sketch)

StartTrigger(taskHandle, "/Dev1/StartTrigger")

and every ither things I used I also changed to never call the trigger lines myself...it solkved that issue

Sorry for the long time between reply...never got the message that I had an answer ^^;

Thanks though