Writing a program using an output from a NAND gate to trigger an event.

[Junyi]

I'm using a PCI 6024E with a CB 68 board and Visual Basic 6.
I would like to trigger an event when the output signal from a NAND gate is high. Do I have to use a DO loop to keep checking for this trigger?

[Filipe A.]

Hello;

If you want to use the DAQ board you have there, you will need to keep polling the digital line to recognize the state change.

If you need something more accurate, you can use one of the digital boards, such as the PCI-DIO-32HS, and do change detection on the digital lines.

Hope this helps.
Filipe A.
Applications Engineer
National Instruments