toggle boolean switch

[netee]

Hi,

I am doing a project where i should move the pusher with different pressure.the pusher goes in and out of the a certain material. When the pusher goes in it should be pushed inside with a low pressure. when the pusher goes out it should be pull out with a high pressure, so i want to control this with a boolean switch to switch between different states, this should happen automatically without manually having to switch the pusher pressure. so i want to know how do i toggle a switch programmatically.See the attached picture.

Thanks!!

[TWGomez]

variable

[Mathan]

Hai,

Try using a flat sequence structure with specified time delay and give true and false constants to the boolean switch accordingly.

Mathan

[JeffOverton]

right click on the control in your block diagram, select create->reference.  wire a property node to this, right click the property node, select "change to write" and choose "value," then just wire a true or false to it.

[GerdW]

Hi Jeff,

instead of "value" property nodes simple local variables will do the same, but faster

[JeffOverton]

Ah, but locals also introduce race conditions

[TWGomez]

So do propery nodes...

[JeffOverton]

Property nodes have control outputs that can enforce data flow.  Locals do not.

[TWGomez]

Granted, but if you can wire something into the property node that truely stops a race condition (other than a semaphore of some type) then you can wire the data directly to an indicated and have no purpose to the property node. The property node itself only ensures dataflow (as you said) and does nothing to stop any actual race condition.

In such cases the best bet would be to use a functional global anyways...but none of that has to do with the question that was asked...

[JeffOverton]

That's a valid point.

And more to the point of the question, why not just use the output of the button to control the pressure?  Why do you need a switch?