Histerisis condition

[George7893]

Hi everyone,

I've one sensor and one reference value. I want to change a boolean value when de diference above is more than 0.5. Then, I want to keep in that state until the variable value is 0.5 lower than the reference one. How could it be done? I attach a capture where there is a code which only does one part.

Thank you!

[GerdW]

Hi George,

---

@George7893 wrote:

I've one sensor and one reference value. I want to change a boolean value when de diference above is more than 0.5. Then, I want to keep in that state until the variable value is 0.5 lower than the reference one. How could it be done?

---

Use a shift register in your loop to store the current state of the boolean. Then use a case structure to handle your two cases to check for the next "change condition"…

---

@George7893 wrote:

I attach a capture where there is a code which only does one part.

---

No, you did not attach anything…

[George7893 · Accepted solution]

I finally solve it as the capture attached by using another post. Thank you anyway.

[GerdW]

Hi George,

why do you need DDT wires and so many functions?

See this as suggestion:

[George7893]

Hi again!,

Of course your model is really simple but I'm not able to make it work in my VI. I attach the whole graphic. I'm new in LabView, so maybe I'm confused with something.

Best Regards

[GerdW]

Hi George,

don't use express VIs and their DDT wires: they will not help you in the long run!

As a quick fix: place a FromDDT function after the filter express and convert to scalar DBL.