Programmitcally adding annotations to a graph stored in a cluster

Hello!

I have a cluster that contains a chart of waveform. I would take this cluster and enter a Subvi and the Subvi add markers of this graph that is stored in the cluster. The reason for this is that I would like to move easily around this graph annotated in my code for the later generation of reports.

I have a problem 'save' annotations to the curve that is stored in the cluster. I've tried that doesn't seem to work.

Annotations are generated correctly, and when I look to the front of this sub - VI I see the chart with the appropriate annotations. But, when I wire this an indicator chart elsewhere in my program, the annotations are not displayed. References are not my strong suit, and it was my best attempt slapped together. Any ideas?

Thank you!

-Paul

Hi Paul,.

You will definitely want to use a reference here so that the Subvi changes the ownership of the specific graph you want to know the main graphic of your VI. Currently, you use an implicit property (the AnntList with the orange bar) node, which only changes the graph in the Subvi. It is because an implicit property node modifies a control by its name, and this name is recognized only in this specific VI.

To create a reference, you simply right-click on the chart in your main VI and go to create > reference. This reference will be what you pass to your Subvi.

As a side note, you want to make sure that you overwrite not the previous annotations whenever you write to the AnntList property. I suggest to use an explicit property node in the Subvi then read you the current value of AnntList and then add / change the parts you want and then write in AnntList at the end.

I hope this helps!

Tags: NI Software

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