MATLABOPCToolbox

Hans-PetterHalvorsen,M.Sc.

SoftwareYouneedthefollowingSoftware:• OPCServer(e.g.,MatrikonOPCSimulationServer,FreeDownload)

• MATLAB• MATLABOPCToolbox

www.mathworks.com/products/opc

MATLAB

Hans-PetterHalvorsen,M.Sc.

WhatisMATLAB?• MATLABisatoolfortechnicalcomputing,computationandvisualizationinanintegratedenvironment.

• MATLABisanabbreviationforMATrix LABoratory• ItiswellsuitedforMatrixmanipulationandproblemsolvingrelatedtoLinearAlgebra,Modelling,SimulationandControlApplications

• PopularinUniversities, TeachingandResearch

TheMATLABEnvironment(IDE)

CommandWindow

ScriptEditor

WorkspaceCurrentFolder

PlotWindow

MATLABSyntax- Exampleclearclcclose all

x=[0, 1, 2, 3, 4 ,5];y=[15, 10, 9, 6, 2 ,0];

for n=1:6 % n = model order

p = polyfit(x,y,n)

ymodel = polyval(p,x);

subplot(3,2,n)plot(x,y,'o',x,ymodel)title(sprintf('Model order %d', n));

end

ForLoop

Built-inFunctions

DefiningVectors

50+Toolboxes

Installation

• MATLABandSimulinkStudentSuite(NOK699)Included:MATLAB+Simulink+StatisticsToolbox+OptimizationToolbox+SymbolicMathToolbox+ControlSystemToolbox+SignalProcessingToolbox+ImageProcessingToolbox,...

• MATLABStudent(NOK350+)IncludesMATLABonly.Add-onproductsmustbepurchasedseparately(NOK70/Toolboxifyoubuythematthesametime,elseNOK200/Toolbox).Selectbetween55differentToolboxes

http://www.mathworks.com/academia/student_version

2differentoptions:

OPC

Hans-PetterHalvorsen,M.Sc.

WhatisOPC?• Astandardthatdefinesthecommunicationofdatabetweendevicesfromdifferentmanufactures

• RequiresanOPCserverthatcommunicateswiththeOPCclients

• OPCallows“plug-and-play”,givesbenefitsasreducesinstallationtimeandtheopportunitytochooseproductsfromdifferentmanufactures

• Differentstandards:“Real-time”data(OPCDA),Historicaldata(OPCHDA),Alarm&Eventdata(OPCAE),etc.

OPC

OPCServer OPCClient

OPC-Server

Network

OPC-Client OPC-ClientOPC-Client

Process

ProcessData

DataAcquisitionPLC,PAC,DCS,SCADA

TypicalOPCScenario

Driver

SensorsActuators

OPCSpecifications

OPCDA

OPCHDA

OPCA&E

OPCUA

“Classic”OPC “NextGeneration”OPC

...(Manyothers)

OPCSpecifications• OPCDA(DataAccess)ThemostcommonOPCspecificationisOPCDA,whichisusedtoreadandwrite“real-time”data.WhenvendorsrefertoOPCgenerically,theytypicallymeanOPCDA.• OPCHDA(HistoricalDataAccess)• OPCA&E(Alarms&Events)• ...(manyothers)TheseOPCspecificationarebasedontheOLE,COM,andDCOMtechnologiesdevelopedbyMicrosoftfortheMicrosoftWindowsoperatingsystemfamily.ThismakesitcomplicatedtomakeitworkinamodernNetwork!TypicallyyouneedaTunneller SoftwareinordertosharetheOPCdatainanetwork(betweenOPCServersandClients)

• OPCUA(UnifiedArchitecture)OPCUAeliminatingtheneedtouseaMicrosoftWindowsbasedplatformofearlierOPCversions.OPCUAcombinesthefunctionalityoftheexistingOPCinterfaceswithnewtechnologiessuchasXMLandWebServices(HTTP,SOAP)

MATLABOPCToolbox

Hans-PetterHalvorsen,M.Sc.

MATLABOPCToolbox• OPCToolboxprovidesaccesstoliveandhistoricalOPCdatadirectlyfromMATLABandSimulink

• Youcanread,write,andlogOPCdatafromdevices,suchasdistributedcontrolsystems(DCS),supervisorycontrolanddataacquisitionsystems(SCADA),andprogrammablelogiccontrollers(PLS)

MATLABOPCToolbox

TheMATLABOPCToolboxsupportsthefollowingOPCprotocols:• OPCDA(DataAccess)• OPCHDA(HistoricalDataAccess)• OPCUA(UnifiedArchitecture)

ThisVideo

ALaterVideo

AcquireDatafromanOPCDataAccessServer(withExamples):http://se.mathworks.com/help/opc/examples/acquire-data-from-an-opc-data-access-server.html?prodcode=OT&language=en

RunthiscommandintheMATLABCommandwindow

MATLABOPCToolboxFormoreinformationabouttheMATLABOPCToolbox:

AcquireDatafromanOPCDataAccessServer(withExamples):http://se.mathworks.com/help/opc/examples/acquire-data-from-an-opc-data-access-server.html?prodcode=OT&language=en

www.mathworks.com/products/opc

MatrikonOPCSimulationServer

Hans-PetterHalvorsen,M.Sc.

Matrikon OPCExplorer– ConnecttoServer

1

2

Matrikon OPCExplorer- AddTags

1

2

3

4

5

Double-click

Finished

MatrikonOPCExplorer(OPCClient)

TheMatrikonOPCExplorerisuseful fortesting.YoucanuseitforwritingandreadingOPCTags

MATLABOPCToolbox

Hans-PetterHalvorsen,M.Sc.

ReadDatafromOPCDAServer

Examples

MATLAB

OPCServer

OPCClient

MATLABisaTooltypicallyusedforDataAnalysis,soyoutypicallyReadDatafromtheOPCServer.(Butitispossible toconnectDAQdevicesandReadMeasurementDataintoMATLABandthenWritethoseDataValuestoanOPCServer)

WithMATLABOPCToolboxyoucancreateOPCClientsthatWriteorReadtoanOPCServer

clear, clc% Connect to OPC Serverda = opcda('localhost', 'Matrikon.OPC.Simulation.1');connect(da);

% Create Groupgrp = addgroup(da, 'DemoGroup');

%Add TagsitmIDs = {'Random.Real8'};itm = additem(grp, itmIDs);

% Retrieve Datadata = read(grp);opcdata = data.Value

%Clean Updisconnect(da)delete(da)

MATLABOPCRead

Example1

ThissimpleExamplereadsonlyonevaluefromtheServer

MATLABOPCRead

Example2

clear, clc

% Connect to OPC Serverda = opcda('localhost', 'Matrikon.OPC.Simulation.1');connect(da);

% Create Groupgrp = addgroup(da, 'DemoGroup');

%Add TagsitmIDs = {'Random.Real8'};itm = additem(grp, itmIDs);

% Retrieve DataN=10;for i=1:N

data = read(grp);opcdata(i) = data.Value;pause(2)

end

%Clean Updisconnect(da)delete(da)

plot(opcdata)

ThissimpleExamplereadsvaluesfromtheServer.

ThisExamplesreadsNvaluesusingaForLoop

MATLABOPCRead

Example3

clear, clc% Connect to OPC Serverda = opcda('localhost', 'Matrikon.OPC.Simulation.1');connect(da);% Create Groupgrp = addgroup(da, 'DemoGroup');%Add TagsitmIDs = {'Random.Real8'};itm = additem(grp, itmIDs)% Set PropertieslogDuration = 60;logRate = 0.2;numRecords = ceil(logDuration./logRate)grp.UpdateRate = logRate;grp.RecordsToAcquire = numRecords;% Acquire Datastart(grp), wait(grp)% Retrieve Data[logIDs, logVal, logQual, logTime, logEvtTime] = getdata(grp, 'double');% Plot Dataplot(logTime, logVal);axis tightdatetick('x', 'keeplimits')legend(logIDs)%Clean Updisconnect(da)delete(da)

ThissimpleExampleusessomeofthemoreadvancedfeaturesintheMATLABOPCToolbox.NoFor/WhileLoopneeded!

Hans-PetterHalvorsen,M.Sc.

UniversityCollegeofSoutheastNorwaywww.usn.no

E-mail:hans.p.halvorsen@hit.noBlog:http://home.hit.no/~hansha/