The Control(0...3) lines of the PCI 1424 card are used to set camera attributes such as shutter speed and frame rate through pulse trains. These lines aren't accessable in software, but are configured in each digital camera's camera file (.icd). Once it is configured as an attribute, the attribute can be set in the Measurement & Automation Explorer (MAX) or in LabVIEW using the IMAQ Get/Set Camera Attribute VIs.
The Enable(A...D) lines are used to input a camera's sync signals. For instance, on a typical area scan camera, Enable A is used for the Frame Enable and Enable B for the Line Enable. These lines are also inaccessable from a programming environment.
