Automatically Run a Matlab Script

I have a script that I want to run automatically, every 5 seconds. How could I set this up so that it runs in an unattended manner?

Answer 1

[the cyclist]

See this question & answer.

[fahd Belmajdoub]

Thank you for your response. Actually, I couldn't find how to schedule a windows task according to the link : http://support.microsoft.com/kb/308569/en-us.

Otherwise, isn't there a script on Matlab to run in an iterative way?

[the cyclist]

Oh, sorry. I should have clicked through to link they suggested. But I think what you want in Windows is the Task Scheduler.

To my knowledge, there is no task-scheduling ability that is fully internal to MATLAB.

[fahd Belmajdoub]

Unfortunatly, the task trigger can't be less than one daily. I think we can't adopt the task scheduling for a 5 seconds script sequence.

I actually receive input data from sensors online, then I make some treatment in Matlab before sending the output signal via an OPC client/sever solution. The solution exists in the litterature, but I'm stuck with a static script that doesn't update its data from the online sensors. That's why I need an automatic script runner with 5 seconds interval.

[Steven Lord]

I'm not completely certain since I haven't used it myself, but if you're not already aware there is an OPC Toolbox that may be of use to you. The "Data Access" section may describe functions and functionality that would be useful to you.

[fahd Belmajdoub]

Thank you for you assistance and support. You were right about the OPC Toolbox. I also found this interesting link that tlaks about the same issue: https://www.mathworks.com/matlabcentral/answers/367504-automatically-run-a-matlab-script; I still don't figure it out but we're in the right way for the answer.

[the cyclist]

The page I linked has a section entitled "How to create an advanced task ...".

It looks to me that #21 in that section describes how to repeat the task at higher frequency. (The internet suggested the same to me.)

I don't know if you can go down all the way to 5 seconds, though.

[fahd Belmajdoub]

I can repeate the task every 5 minutes, but I can't find less than a minute (see attached figure, for at least 5 minutes frequency)

[Steven Lord]

Do you need to run the script from the beginning every five seconds, or would running a script that loops indefinitely and polls for data to process every five seconds be sufficient?

[fahd Belmajdoub]

The script actually consists on importing variables from an OPC server coming from a PLC, make a prediction for a new variable using neural networks, then write this new predicted variable to the OPC server (see code below). So, I think the script should be running systematically in order to retrieve new data from the input variables, and write the new predicted value of the output to OPC server.

%% OPC connection

da= opcda('Localhost', 'Matrikon.OPC.SiemensPLC.1');
connect(da);

%create Group
grp = addgroup(da, 'YYY');

%Add Tags
additem(grp, {'TCP CHANNEL>YYY>FeedRate', 'TCP CHANNEL>YYY>Reject', 'TCP CHANNEL>YYY>puissanceelevderecirc', 'TCP CHANNEL>YYY>Clinker','TCP CHANNEL>YYY>Limestone', 'TCP CHANNEL>YYY>RegistreRecirculation' , 'TCP CHANNEL>YYY>Maindrivepower', 'TCP CHANNEL>YYY>Temperaturesortiebroy', 'TCP CHANNEL>YYY>Puissanceseparateur', 'TCP CHANNEL>YYY>pressionsortiebroyeur', 'TCP CHANNEL>YYY>Electronicear', 'TCP CHANNEL>YYY>Gypsum'});

%Retrieve Data
r = read(grp);
%r(:,1).Value
X = extractfield(r,'Value').';


%Clean up
disconnect(da)
delete(da)

%% Predict output

Y = MatlabMatrixonlyfunction(X)

%% OPC Write

da = opcda('Localhost', 'Matrikon.OPC.SiemensPLC.1');
connect(da);
grp = addgroup(da, 'DemoGroup');
itmIDs = {'TCP CHANNEL>YYY>FinesseLaboratoire'};
itm = additem(grp, itmIDs);

% read and write values to and from the items

write(itm, Y);
R45predite = read(itm);