without using DAQ how to make a PID controller for temperature control

[danil33]

Sir,

      Iam trying to make a PID controller for temperature control in labview.But I have no DAQ devices.So without using DAQ how to make a PID controller.please suggest some useful block diagram.plz give me a reply.I tried one but not working.below attached is my work.

[altenbach]

Do you have the PID toolkit? The example finder has a few PID examples. Have you looked at them?

Your attached example is missing all subVIs and makes no sense. What is the purpose of the outer while loop?

[danil33]

There is no PID tool kit in my function pallete or tools pallete.And no DAQ devices.Can I make a PID controller without this.

[altenbach]

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@danil33 wrote:

Can I make a PID controller without this.

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Yes.

[danil33]

How??? please reply

[BZajec]

 PID controller is (normally) supposed to control something in the real world. Hence you need a device that will provide your computer (and your labview program) with the measured value (e.g. temperature or water level.......). Than you also need a device that communicates with your computer and has certain impact on the quantity you would like to control (e.g. a voltage to turn on/off relay for heating or similar). 

 If you have no daq this can be a bit awkward however there are other ways to exchange real world signals with computer: e.g.: handheld multimeter with rs232 connection to computer (for input) and e.g. parallel port to output digital signals (5V or 0V).

What do you want to do and what you have available?

with best regards,

 Bojan

[danil33]

Actually,Iam Learning labview.So external devices and Daq not available.And trying to give the input manually to see the PID controller output.I have PID controls in the function pallete.please give me a solution.

[Akiel · Accepted solution]

as a learning exercise, some devices can be simulated in measurement explorer (run measurement explorer, right click on devices select create new. Select simulated device and pick your device, you can search by product code e.g. 4070 for a dmm)

hope this helps you start  to learn labview, depending how advanced you i can strongly suggest looking into the core 1 and core 2 training courses as well as looking at the examples that come with labview 

[danil33]

Thank u