DAQmx physical channel to string

[Jamieg]

Hi Labview forum,

I have a variable DAQmx physical channel variable.
I would like to write the physical channel used to a file.
Is there a way to convert the physical channel selected to a string for writing to file?
Or to access a property node which stores the channel name in string format?

Regards,
Jamie

[RavensFan]

You can use the typecast function on the Numeric/Data Manipulation palette.

[Jamieg]

Thanks Ravens Fan,

that worked well

[LabVIEW1234]

Can you tell me what is possibly wrong with this solution. I keep getting the error "One or more required inputs to this function are not wired or are wired incorrectly. Show the Context Help window to see what the connections to this function should be."

The error is associated with the typecast and the physical channel.

[crossrulz]

The type cast redefines the binary representation.  In this case, you will get a very wierd reference to who knows what.

What you really should be doing is use the Scan From String for both the Channel Type and the Physical Channel.

[LabVIEW1234]

I am not sure how to use "Scan from String" for these unique data types. Where can I find the format codes for physical channels and enums. I guess ENUM is U32 or something like that but I have no idea what a physical channel is.

[Dennis_Knutson]

The input to the physical channel can be a string - 'dev1\ai0'. No conversion to unique data types.

[crossrulz]

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@LabVIEW1234 wrote:

I am not sure how to use "Scan from String" for these unique data types. Where can I find the format codes for physical channels and enums. I guess ENUM is U32 or something like that but I have no idea what a physical channel is.

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You have to use the Scan From String to convert your string to the enum.  But as Dennis said, just wire your string straight into the Physical Channel input.