Writeing datat to Chart References in a SubVi

[john_or]

Is it okay to pass a chart reference to a sub vi and write data to it? Why is it not working here? Are there any performance problems with it?

Thanks John

[GerdW]

Hi John,

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@john_or wrote:

Is it okay to pass a chart reference to a sub vi and write data to it?

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Yes.

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@john_or wrote:

Why is it not working here?

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Your loop stops on error: which error do you get?

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@john_or wrote:

Are there any performance problems with it?

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Using references/property nodes to write data into indicators is considered slow (when compared to writing to the terminal).

[JÞB]

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@john_or wrote:

Is it okay to pass a chart reference to a sub vi and write data to it? Why is it not working here? Are there any performance problems with it?

Thanks John

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Value is not the property you want to use.  Read the Chart History array property,  append the dequeued array to the Chart History array then write the appended array back to the Chart History property.

[raphschru]

To complete what Jay said, you likely have a data type mismatch error because you are writing an array while the chart data type is a scalar, so your loop stops at the first iteration without writing anything to the chart.