How to set tristate logic using NI-DAQ 6212 in C#

[kasrus]

Hi everyone,

I am very new to NI & seeking guidance from all of you, experts out there.

As the subject says it, I am trying to set digital output channel to tristate using DAQmx & C#. I found link on Tristate property, but I do not know how to use it. http://zone.ni.com/reference/en-XX/help/370473H-01/mstudiowebhelp/html/bd33b0d/

Any help would be very much appreciated!

Thank you.  

[ks30 · Accepted solution]

Hi kasrus,

You would set the property using the following syntax (after creating your task):

digitalWriteTask.DOChannels.All.Tristate = true;

As the help document indicates: "You must commit the task for this setting to take effect."  The help document also highlights when to set the property in relation to a read or write.

This is referring to the DAQmx Task State Model:

Task State Model

http://zone.ni.com/reference/en-XX/help/370466AC-01/mxcncpts/taskstatemodel/

The configuration methods will move your task through this state model, but you can also control them using the syntax in the below article:

Verifying, Committing, Starting, and Stopping NI-DAQmx Tasks Programmatically

http://zone.ni.com/reference/en-XX/help/370473H-01/mstudiowebhelp/html/verifycommitstartstopdaqtask/

Regards,

Kyle S.

Applications Engineer

National Instruments

http://www.ni.com/support