MATLAB - GUI and OPC server

Question

I want to design a graphical user interface in MATLAB that can read data continuously using the MATLAB's object linking and embedding for process control (OPC) toolbox. How can I implement this?

I have designed the graphical user interface, but I'm not able to read the data into the graphical user interface.

Do you have the OPC toolbox (http://www.mathworks.co.uk/products/opc/)? Have you tried the `read` function (http://www.mathworks.co.uk/help/opc/ug/read.html)? — am304, Nov 13 '13 at 12:36

score 0 · Answer 1 · edited Oct 07 '22 at 01:19

0

Take a look at this submission of mine from the MATLAB Central File Exchange. It gives a full example of how to read and write data from an OPC server, and how to create and compile a GUI interface with this functionality as well.

The submission used to have recorded webinar associated with it - unfortunately that seems to have been taken down as it was a bit old. Nevertheless, there's a demonstration script included in the files that walks through the entire process, and I think should give you a good idea of what's going on.

edited Oct 07 '22 at 01:19

desertnaut

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answered Nov 13 '13 at 16:52

Sam Roberts

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the file has been removed can you give the correct link here or can you send it to my mail abitha.vs16@gmail.com? thanks in advance :) – user2987586 Nov 14 '13 at 16:23
Hey @sam-roberts can you help me in this https://stackoverflow.com/questions/64803478/dymola-matlab-how-to-write-initialize-tag-for-this-model-realtime-opc – Rohit gupta Nov 12 '20 at 22:13

Rohit gupta · Answer 2 · 2020-11-23T11:46:14.353

just do this

type opctool inside MATLAB

click create new host
select Localhost

Click add client

click add group and add item

Now you can see the actual name of variable you want to call like SimControl.Run, SimControl.Stop , ..etc

Now you have to code it like this in MATLAB

         %====================================VARIABLE VALUE===============================
         volume_val=app.VolumeVEditField.Value;
         area_val=app.AreaAEditField.Value;



         %====================================CONNECTION====================================
         global hostInfo ;
         hostInfo = opcserverinfo('localhost');
         global da;
         da = opcda('localhost','Dymosim.OPCServer.1');
         connect(da);
         pause(2);


         %====================================INITIAL VARIABLE=============================
         grp=addgroup(da,'Demo');
         grp2=addgroup(da,'Demo2');
         Initialize=additem(grp2,{'SimControl.Initialize'});
         Run=additem(grp2,{'SimControl.Run'});
         Status=additem(grp2,{'SimControl.Status'});
         Stop=additem(grp2,{'SimControl.Stop'});
         Pause=additem(grp2,{'SimControl.Pause'});
         %=================================================================================
         write(Initialize,1);

         %you can use write(area,area_val)

Then you can use deploytool to create app

MATLAB - GUI and OPC server

2 Answers2

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