how do I set the ExTrig of a Basler A602f camera to falling edge?

[Bernd R.]

I'd like to trigger the exposure start on the falling edge of an
external trigger signal. I use IMAQ 1394 Configure Trigger VI, but
nothing happens when I change the polarity (true or false). Is it
possible at all to control the camera via LabVIEW? Or do I have to use
the Trigger_Mode control register as mentioned in the camera manual. I
just don't understand how to do that.

Thanks
Bernd