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While you cannot read this channel with the default settings for a DAQmx Physical Channel, you can read the Analog Output in relation to the Analog Output Ground by enabling the selection of Internal Channels:
With digital I/O lines, you can use a DAQmx Read to read the value back from the same output channel without having to internally route signals. The following VI Snippet illustrates how to accomplish this:
The same operation programming flow shown above for LabVIEW can be used in LabWindows/CVI when using digital lines. You can simply call a DAQmxRead function on a digital output channel to read the current line state.
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