How to make a flag?

[danypag]

Hi

I made a program with knobs and case structures that have to turn on a led when certain limits are reached. I've done that part very well, the problem is that i want the led stay on when I set the knob to its original position. I know that I can use a flag, I tried to make it with a feed back node but it didn't work. I attached the VI. Any help would be appreciated.

[altenbach]

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@danypag wrote:

I tried to make it with a feed back node but it didn't work. I attached the VI.

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I cannot find a feedback node in your attachment.

Your innermost case structure containing the TRUE diagram constant can be replaced by a plain wire.

[apok]

use shift register with OR logic

Spoiler

[JÞB]

apok,

Are you trying to get featured in the Rube-Goldberg thread?  Look at "Case 3"  Why do you need two boolean constants T in the True case F in the false case?  The wire out of in-range and coerce would work just as well wouldn't it?

[apok]

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@JÞB wrote:

apok,

Are you trying to get featured in the Rube-Goldberg thread?  Look at "Case 3"  Why do you need two boolean constants T in the True case F in the false case?  The wire out of in-range and coerce would work just as well wouldn't it?

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i just used his code, i did not bother with cleaning/efficiencying (well i did in a sort of way by pressing 'clean up diagram) it up,please dont put me in the RG code jail i ran out of passes? anyone up for a game of 'mouse trap'?

ouch!, i see it now...

[altenbach · Accepted solution]

That's why I said "Your innermost case structure containing the TRUE diagram constant can be replaced by a plain wire." 😄

controls belong on the toplevel diagrams, not inside cases.

A UI loop needs a small wait

Knob 4 seems irrelevant.

Here's one possibility...

[danypag]

Thanx, but now i have the problem of turning it off, that is why i had a fourth knob.

[crossrulz]

You don't need another knob.  What you need is a reset button.  Make the button a Latch When Released mechanical action (default for actual buttons).  Invert the state of the button and AND that with the flag.  That will reset your flag.

[apok]

can you explain to us what your reasoning for the logic and what the application is? i believe there is a better way of solving your needs than multiple knobs and case statements...

[danypag]

This is a project for a class, I'm doing a lift chair for elder people, at scale of course. I have to use Lab View with arduino, I've already done the code in arduino and it worked pretty well, but I am new at lab view. There are no knobs in my project, I used them to represent distance sensors reaching their limits. I used two pressure sensors and two distance sensors, that is why I'm using four knobs. I attached the arduino code so you can understand what I want to do.