How can I keep running event-based state machine by a single event

[REDUANUL]

Hello Folks,

I need your help.

In the event-based state machine when a Boolean is true then the event will occur but I want to keep my event running until Boolean (I’m using mechanical action “Switch when pressed”) is false.  

Thanks.

- Reduanul

[johntrich1971]

Could you attach your code? It sounds like you are running your code inside the event structure. I would recommend moving your code to its own loop and sending messages to start and stop based on the boolean events (you will get a value change event for both T-F and F-T).

[RTSLVU · Accepted solution]

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@REDUANUL wrote:

Hello Folks,

I need your help.

In the event-based state machine when a Boolean is true then the event will occur but I want to keep my event running until Boolean (I’m using mechanical action “Switch when pressed”) is false.  

Thanks.

- Reduanul

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I typically use the Value(Signaling) Property Node for this.

Here's an example of what I think you are asking...

I would probably put the Val(Sgnl) property node inside a case that follows your Boolean so it only triggers a value change when true.

[altenbach]

Please define "Keep the event running". Do you want to remain inside the event (not recommended) or re-enter the same event over and over as long as the boolean is true? What else needs to happen in parallel?

I sometimes use the timeout event for the bulk of the work and switch the timeout (held in a shift register) based on the new switch value between "short" and "-1" (i.e. infinite).

In any case, we need significantly more detail to give advice. Show us your VI.

[REDUANUL]

@ RTSLVU,

Thanks for your advice but in my code, it's not working probably I have to do another way around.

@ altenbach,

Sorry for not being attaching the full code but for easy understanding please have a look:

Here when I press the ON/OFF button all messages are executed once but afterward Event Handing loop wait for another event from other cases or from the ON/OFF case. 

So what I am trying is, when ON/OFF remained pressed messages will execute continuously instead of once. Then in the false case Event handling loop will wait for another event. Hope it helps you.

[altenbach]

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@REDUANUL wrote:

So what I am trying is, when ON/OFF remained pressed messages will execute continuously instead of once. Then in the false case Event handling loop will wait for another event. Hope it helps you.

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Use my timeout suggestion.

[altenbach]

Here's how that could look like. (Assuming that your subVIs execute and return quickly, you can easily adapt it to your scenario.)

[REDUANUL]

@ altenbach,

I tried your approach. I not getting where is the problem.

Here is my implementation:

I wired the timeout case according to your suggestion as well. Till now event handler only executing the message once to the Message handling loop.

[altenbach]

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@REDUANUL wrote:

Here is my implementation:

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No, that's just a picture.

[johntrich1971]

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@altenbach wrote:

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@REDUANUL wrote:

Here is my implementation:

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No, that's just a picture.

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And the picture doesn't even show all of the code. I don't think that you implemented the code the way altenbach suggested.