Rif.: Unable to dynamically change enum file on LabVIEW

[skykong]

So far we are able to change ring value dynamically with LabVIEW but not for enum with .ctl files. Is there any effective method to dynamically edit the contain of the enum using LabVIEW?

[GerdW]

Hi skykong,

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@skykong wrote:

So far we are able to change ring value dynamically with LabVIEW 

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Yes.

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@skykong wrote:

Is there any effective method to dynamically edit the contain of the enum using LabVIEW?

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Nope.

Enums are defined at edit time (as they define the datatype).

Changing them requires to recompile your executable - which isn't possible at runtime…

[pincpanter]

You can, but the Enum must not be reserved for execution.

This example works as long as no running vi uses the ctl:

Of course, the file MyEnum.ctl must exist already.

[skykong]

Great! Can you provide the vi for references? Thanks.

[pincpanter]

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@skykong  ha scritto:

Great! Can you provide the vi for references? Thanks.

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It's a snippet. Save it as a picture (.png) and then drag it into a Block Diagram.

Of course, you need LV>=2021

[billko]

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@pincpanter wrote:

You can, but the Enum must not be reserved for execution.

This example works as long as no running vi uses the ctl:

Of course, the file MyEnum.ctl must exist already.

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Maybe we should take a step back and ask why updating a ring is not sufficient?

[skykong]

This method won’t work because this only workable if execution is stop. Is there any method that work with executable is continue running?

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[raphschru]

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@skykong wrote:

This method won’t work because this only workable if execution is stop.

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This is what others were meaning when they said:

@GerdW: "Enums are defined at edit time (as they define the datatype).

Changing them requires to recompile your executable - which isn't possible at runtime…"

and

@pincpanter: "the Enum must not be reserved for execution.

This example works as long as no running vi uses the ctl"

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@skykong wrote:

Is there any method that work with executable is continue running?

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Enums by definition are not editable at runtime. If you want a drop-down list with items settable at runtime, you have to use either a Ring (numeric data type) or a Combo Box (string data type).

Regards,

Raphaël.