write a single digital line

[cyrilng]

Hello,
i want to write a single digital line in labwindows/cvi.
i created a task in MAX and it is ok.
But when i load, then start the task and finally use DAQmxWriteDigitalScalarU32 function, anything happens.
The error code is zero ( what means it should be ok) but the line doesn't toggle.
What is the problem?
Thank you

[Benjamin_C]

Hi,

It is not possible to answer you without knowing :
- how is configured the task (number of output lines, generation mode, ...),
- what type of card is used,
- what line of the card is watched.
Nevertheless, to write on an single digital line i suggest you to use the DAQmxWriteDigitalLines function instead of DAQmxWriteDigitalU8.
Try to use an example to validate that everything works fine from LabWindows/CVI.

Regards,

Benjamin CHARLES
Applications Engineer
National Instruments France