Get Boolean through Property node in Subvi

[jyang72211]

I understand that using the producer/consumer will enable me to handle user interaction a lot better.  However, I choose the state machine due to simplicity and close to 0 user interaction during run time (I just have 1 abort boolean).  In my state machines, there are some subvi that also contain state machine.  

[PaulieQ]

I hope I undrestood right your question.

It's simple. The property node is using the reference and not the value.

 - For the first boolean indicator you are passing to the While Loop the value. The value remains the same during the loop, no matter what you change.

 - For the second boolean indicator you are passing the reference. The Refrence remains constant BUT the Value of the Refrenced Control has changed. And you read the Value of a Refrenced controll. I know that's not accurate but in this case is pretty much the same as with pointers in C.

Paul

[Mark_Yedinak]

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@PaulieQ wrote:

I hope I undrestood right your question.

It's simple. The property node is using the reference and not the value.

 - For the first boolean indicator you are passing to the While Loop the value. The value remains the same during the loop, no matter what you change.

 - For the second boolean indicator you are passing the reference. The Refrence remains constant BUT the Value of the Refrenced Control has changed. And you read the Value of a Refrenced controll. I know that's not accurate but in this case is pretty much the same as with pointers in C.

Paul

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As someone mentioned earlier it also depends on the mechanical action of the control/button. If it latches (such as latch until read) the property node will always read the same value because the control value is not unpdated until the latch condition is met.