analog

[JM Chin]

Hello NI community!

I'm supposed to create a GUI for a level and flow sensor. I've distinguished that I need to control the flow of water (input) by manipulating the speed of the control valve (input). The results should show the level (output) of water in a tank by varying the flow of wate. I need to present the results in graphs and numerical numbers.

Can anyone kindly give me some pointers on how to create this particular GUI?

Thanks!

Chin
(jemeinchin@gmail.com)

[GerdW]

Hi Chin,

do you need help in placing controls and indicators on a frontpanel?

Do you need help in finding the "correct" controls/indicators in the palettes?

Or do you need help in wiring the controls/indicators in the block diagram? Then please rephrase your question and show where exactly you have problems...

And please: use a better subject next time you post a question!

[KateB]

What you need is LabVIEW tutorial: http://search.ni.com/nisearch/app/main/p/bot/no/ap/tech/lang/en/pg/1/sn/catnav:tu/q/labview%20tutori...

[JM Chin]

Hi Gerd,

First of all, I have to apologize for the rather short and confusing title. I should've written a longer and proper title. My bad.

OK, here's my problem:

I've already created a GUI to control my hardware valve opening (analog output), flow and level control (analog input) using DAQ assistant, arrays and the results in waveform graphs and meter. But, all these can only be controlled manually. It's working perfectly.

The problem is that I want to control all the above automatically - with the experiment running with a pre-fixed set point on the hardware. The hardware is a RT 210 process control rig from GUNT.

I roughly know that I need to use the function of stacked sequence structure, case structure and local variable for the auto control. The result should be in graphs and data (using format string). But, I don't know the specifics on how to program this GUI.

Any comments or guidance will be deeply appreciated.

TQ.

Chin

[RavensFan]

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JM Chin wrote:
Hi Gerd,

I roughly know that I need to use the function of stacked sequence structure, case structure and local variable for the auto control.
Chin

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NOOO!  Nobody "needs" to use stacked sequence structures or local variables.  99% of the people who think they need them really don't.  Don't use them as they are going to cause you more problems in the long run then you realize right now.  Read Why some people say Local Variables are bad...

What you NEED to do is close the loop between your readings and controls.  I'd recommend searching the forums and NI.com for PID control and read up on that.