Change setpoint automatically to a PID control

[nathand]

---

@becidea wrote:

How can I insert it to my vi?

---

Insert WHAT into your VI?

[becidea]

STANDART DEviation

[nathand]

As I wrote before, it's under the Mathematics -> Probability and Statistics palette, shouldn't be too hard to find.  Drop it on the block diagram in place of the Express VI version that's in your sample code, and you can wire the array of floating points (the thick orange wire) directly to it, without converting to dynamic data.  If you are not yet familiar with that much of LabVIEW, you may want to work through some of the tutorials or take a class.

[TBN]

Hi

I've attached my VI for how I solved the problem with waiting until stable

[becidea]

Dear TBN,

could you please send this vi compatible with earlier version of labview such as LV10

Best.

[TBN]

OK

Here it is.

[becidea]

I have checked the vi you sent, but I have almost the sam configuration. Temperature is fluctuating around the set point, so with this vi,  in the first part of fluctuating will be taken as if temperature stable. but actually it is not like this. Thank you for this vi.

We can use "standart deviation and avarage value". Or, there can be something that I can save every nex 30 data and compare the avarage value of those 30 data with the set point. What do you think about this idea?

besT

[nathand]

---

becidea wrote:

We can use "standart deviation and avarage value". Or, there can be something that I can save every nex 30 data and compare the avarage value of those 30 data with the set point. What do you think about this idea?

---

I think you should try writing the code and see how it works for you - it should not be difficult.  If you get stuck or have specific questions, upload your code.

[becidea]

Hi,

this is my vi, when the temperature is in range light the lamps. But this is not stability. Because temperature fluxcuate and several times can be in range. this should be like PID control. I don't know what you can offer me.

Best.

[nathand]

---

@becidea wrote:

this is my vi, when the temperature is in range light the lamps. But this is not stability. Because temperature fluxcuate and several times can be in range. this should be like PID control. I don't know what you can offer me.

---

I'm sorry, I cannot figure out what you're asking here.  Are you saying that your system never becomes stable?  Does it eventually reach a stable point, but your code does not detect that properly?  If the temperature fluctuates too much, it might be that you need to retune the controller.