National Instruments IEEE 1394 Manual De Usuario

You can find the NI-IMAQ for IEEE 1394 Cameras VIs in the LabVIEW 
Functions palette. From the LabVIEW block diagram, select 
NI Measurements»Vision»IMAQ IEEE-1394.

The most commonly used, high-level VIs are on the IMAQ for IEEE-1394 
palette. You can find VIs for basic acquisition and changing attributes. The 
Vision»IMAQ for IEEE-1394»IMAQ IEEE-1394 Low Level palette 
contains VIs for more advanced applications.

Refer to the NI-IMAQ for IEEE 1394 Cameras VI Reference Help for more 
information about using these VIs.

The following sections describe commonly used VIs and important 
parameters common to many VIs.

IMAQ1394 Session is a unique identifier that specifies which interface file 
to use for the acquisition. The IMAQ1394 Session is produced by the 
IMAQ1394 Init VI and used as an input to all other NI-IMAQ for IEEE 
1394 Cameras VIs. The NI-IMAQ for IEEE 1394 Cameras VIs use 
IMAQ1394 Session Out, which is identical to IMAQ1394 Session, to 
simplify dataflow programming. IMAQ1394 Session Out is similar to the 
duplicate file sessions provided by the file I/O VIs. The high-level 
acquisition VIs—IMAQ1394 Snap, IMAQ1394 Grab Setup, and 
IMAQ1394 Sequence—require you to wire IMAQ1394 Session In only in 
the following instances:

•

If you are using an interface other than the default 

cam0

•

If you are using multiple cameras

•

If you need to set IMAQ 1394 properties before the acquisition

To get and set properties of the acquisition and camera, wire the IMAQ1394 
Session to the LabVIEW property node.