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Re: Feedback Nodes?
The first time a Feedback Node runs, it won't have seen an input value yet, so it uses the value wired to its Initializer Terminal as its first output. If you leave that terminal unwired, the first output will be the default value for whatever type is connected to the input.
LabVIEW's help features can tell you all this. If you have contextual help turned on (toggle it with control-H), you can hover the mouse cursor over anything and get useful information in the Help window. There's usually a link to Detailed help at the end of the brief description.
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