Source of external trigger PCI-4472

Dear all,

I have a PCI-4472 b I want to program to acquire a signal channel 0 whenever it recives a TTL signal throw the input external trigger.

I use a modified example but I don't know which is the name of the external trigger source. I always receive this type of error (for example if I connect to a string that contains "EXT_TRIG"):

Code: '-200265 '.

"DAQmx Start '.
Property: Start.AnlgEdge.Src

" Task name: _unnamedTask"

The program I use is of this form:

First of all, this error means that I have no right external trigger source name entry?

If so, which one is the good name of the source of external trigger for NI4472B?

Thank you for the help



The error pops up because there is no channel named EXT TRIG. If you receive a trigger channel 0, I think that the best way is to specify the name of the channel in the "DAQmx Start Task.  There is a terminal where you can specify the name of the channel and use that name to a string for the trigger input. I think this should solve the problem.

I referred to this knowledge base.

Also, looks like you have trigger 'start analog edge '. Since you want to get the TTL signal, why not try 'start digital dashboard' trigger?

Kind regards

Tags: NI Hardware

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