Newbie Question, One Time Events

Hi I'm new to labview and any help would be appriciated.
Basically I have one numerical control, which i want to be copied to a shared variable when a button is pressed(one that does not latch), afterwards I want the user to be able to change the value of the numeric control W/O changing the shared variable to the new value. The implementation is a single entry calculator in this case, but the project is just for learning.
I tried logic statements as well as case structures and I haven't made it work yet.
My question is there a function or subVI which makes an event only happen once, hypothetically the wire goes away after one cycle?
Any Help appriciated.
Solved!
Go to Solution.

Ford wrote:
Basically I have one numerical control, which i want to be copied to a shared variable when a button is pressed(one that does not latch), afterwards I want the user to be able to change the value of the numeric control W/O changing the shared variable to the new value. The implementation is a single entry calculator in this case, but the project is just for learning.
I don't think you have the correct definition for a "latch action button", because that's what you actually need. Place the writing to the shared variable inside the true case of a case structure. Whenever you press the button, it will turn TRUE until it is read once and the resets to false again.
Alternatively, use an event structure triggered by a vlaue change of the button. The best choice depends on the rest of the code.
Maybe you should show us some code.
LabVIEW Champion . Do more with less code and in less time .

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