How can I set the DO line to tristate NI-9472

[barney99]

I am trying to set up a simple frequency sweep using the NI-9472 and I would like to set the DO line into tristate after the sweep is complete.  How can I do this?  I tried adding a DAQmx channel property node and selected tristate for the digital output but the tristate property is an output.

I've got the DO line connected to a scope so I know the sweep is working.  Attached is the test vi

[Romell]

Hi Barney,

This property is not supported by that device.

Romell Meléndez
Technical Support Engineer NI

[rolfk]

As it is a sourcing digital output, the inactive (low) output value is in fact a high impedance state. What other state would you expect for such an output? Your mechanical light switch also only has an on and off state and there is no magical tri state for it.