Detect value change in a wire

[KathrynB]

It will hold the data until you drop the VI from memory. So close Labview down, close that VI and ALL it's callers and you'll lose the data, otherwise it stays there. These values are iteration based not time based.

[Youcef]

what is the ornage  exactly element ?

[RavensFan]

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@Youcef wrote:

what is the ornage  exactly element ?

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Please translate that to English.

Is your question relevant to a 10 year old message thread?

[altenbach]

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@Youcef wrote:

what is the ornage  exactly element ?

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The orange element here  Is a feedback node as described.

[johntrich1971]

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@altenbach wrote:

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@Youcef wrote:

what is the ornage  exactly element ?

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The orange element here  Is a feedback node as described.

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If you put the feedback node on your block diagram you can right click and choose Change Direction to change the direction of the arrow. The color of the feedback node will change depending upon the type of data that you connect.

[Hooovahh]

In the last 10 years there have been changes to LabVIEW and one of them is through the advent of VIMs, and the "Is Value Changed.vim" on the Comparison palette in 2017 and newer.  That being said there is a catch when it comes to NaN comparisons.  Nothing is equal to NaN, even NaN, so the Is Value Changed may not behave as you expect for this double value.