PCI 4472 external trigger source

[tooooommi]

Dear All,

I have a PCI-4472B which I want to program in order to acquire a signal from channel 0 whenever it recives a TTL signal throw the External Trigger input.

I'm using a modified example but I don't know which is the name of the external trigger source. I always recive this kind of error (for example if I connect a string containing "EXT_TRIG"):

code: "-200265"

"DAQmx Start Task.vi:1<append>
<B>Property: </B>Start.AnlgEdge.Src
<B>Corresponding Value: </B>EXT_TRIG

<B>Task Name: </B>_unnamedTask<DB>"

The program I'm using is of this form:

First of all, does this error mean that I didn't input the right external trigger source name?

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

Thank you for help

[dragon1 · Accepted solution]

Hello there,

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

I refered from this knowledge base. 

http://ae.natinst.com/public.nsf/webPreview/BEBB10D02D72798A8625736B0076B09A?OpenDocument

Also, seems like you have `start analog edge` trigger. Since you want to get TTL signal, why not try `start digital edge` trigger? 

Regards,

[tooooommi]

It was enough to select  "digital trigger edge", thanks!