How do I program the 6704 board for constant output useing CVI

[harryw45]

Here is what I want to do with the 6704 Card

    1) User selects an output channel

    2) User Turns on the switch

    3) +5 volts is output on the channel

    4) When the user turns off the switch 0 volts are sent out the channel

    5) There are 11 discrete channels

Maybe I'm dense but I am trying to do a simple thing with a complicated system all of the examples seem to assume some periodic signal, my signal is simply off and on.

How do I accomplish this?

Harry Watkins

Sofdtware Engineer OADS

Telephone 703-393-0754

[Marni]

Dear Harry,

It is too bad that you don't have a board with more DIO lines. However, this can be done easily using AO lines as well. Have you seen this example? It doesn't use a switch, but it shows how to output a single voltage. Replace the button with a switch. Instead of using the slide, have an if else loop in your code. If the switch is on, make &data for AQmxWriteAnalogF64 5V. If off, make it 0V. The voltage will remain at the same level until you update it with a new single voltage. Please let me know if you have any questions. Have a great day!

Sincerely,

Marni S.

[harryw45]

The link under this will not open so I can't see the example

[Marni]

The link goes to C:\Program Files\National Instruments\CVI71\samples\DAQmx\Analog Out\Generate Voltage\Volt Update.