Hello,
The file ni4472_Start Acquisition (N Boards).vi was found in a library: NI4472 example (N Boards - Single chassis). The library was in a folder "example labview code" so I don't know where it came from. I'm sure we didn't write it. I've attached pictures that show this vi where triggering info is sent into it (It's the one that says "AI Start 4472" in the 1st picture). This vi is on the third level, in the DAQ configuration file, which is in the main program (the main program is the background in both pictures below).
In the file ni4472_Start Acquisition (N Boards).vi, we found two inputs into suv-vi's that had pre-triggering inputs: "AI Start" and "Start Master 4472" (shown in the second picture). I set both of these to 100, as shown in the picture, but when we ran the file and hit the hammer, no pre samples. Please let me know if you have any more advice.
If you want me to post any of these files, I'd be glad to. (Just need to figure out how).
Thanks again,
Tristan
http://www.pbase.com/diamond2a/image/72857779/original.jpg
http://www.pbase.com/diamond2a/image/72858216/original.jpg
Tristan Ericson
Ohio State University Mechanical Engineering
Dynamics and Vibrations
201 West 19th Ave Suite N350
Columbus, OH 43210-1142
Office: 614-292-9029
Lab: 614-247-8077
Fax: 614-292-3163
"No one is useless in this world who lightens the burden of another." - Charles Dickens