Is it possible to find out if a digiatal control is an integer or a double value?

[romankoch]

When I have the Reference to a Digital Control, how can I find out the Representation of it's value(e.g. Double, Integer32,...)?

[Norbert_B]

Activate VI Scripting (LV Options) and you will have access to a property called "Representation"....

Please note that you should only read this property for running VIs!

Norbert

[Alexander_Sobolev]

Does it matter? You can convert value from int control to double, it has enough precision, you will not loose data.

[romankoch]

@Alexander: That is not true for I64/U64. Also I want to save the data to file and save memory.

@Norbert: I will try this out. Is there a reason it is not possible to get the representation without VI Scripting?

[Norbert_B]

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@romankoch wrote:

[...]

@Norbert:[...] Is there a reason it is not possible to get the representation without VI Scripting?

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Honestly, i don't know. I assume some legacy decisions of the LV R&D team.....

Norbert

[paul_cardinale · Accepted solution]

C:\Program Files (x86)\National Instruments\LabVIEW 2015\vi.lib\Utility\Data Type\Get Type Information.vi

[johnbt29]

Yep. The location and the VI paul_cardinale suggest works. Kudos paul!!!

Though there is no Data Type Folder in my PC (Running Win7 and LabVIEW 2014)

C:\Program Files (x86)\National Instruments\LabVIEW 2014\vi.lib\Utility\GetType.llb---->Get Type of Control.vi will help you to determine the Representation of the reference.

[billko]

I'd like to know why you would need to know.  This is for my own education, since I have no idea why it would be useful.

[romankoch]

@billko: I write the value of the control to an config file. So I need to know if I write a double or an integer. Until now I always used a double, but it doesn't look nice, when integer values get displayed with fractional digits.

[Yamaeda]

You can format the value yourself and use Write String key instead. With Format Value and format specifier "%#g" you'll cut trailing zeroes, which should make it general enough.

/Y