WinCC V62 SP2 VBS for Creating Procedures and Actions.docx

WinCC V62 SP2 VBS for Creating Procedures and Actions.docx

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WinCCV62SP2VBSforCreatingProceduresandActions

SIMATICHMI

WinCCV6.2SP2

VBSforCreatingProceduresand

Actions

1.VBSforCreatingProceduresandActions

Contents

WinCCprovidesthepossibilityofdynamizingtheRuntimeenvironmentusingtheVisual

BasicScript.ItispossibletouseVBStoprogramglobalactionsandproceduresaswellas

dynamizinggraphicobjectsandtriggeringactionsinRuntime.

Thischapterwillshowyou

•HowtoworkwithVBScripteditors

•Howtocreateandeditprocedures

•Howtocreateandeditactions

•HowtoactivateVBScriptsinRuntime

•Howtoexecutediagnosticsonscripts

•TheobjectmodelofgraphicRuntimes

•DetailedexamplesonusingVBScript

2.UsingVisualBasicScriptinWinCC

Introduction

InadditiontotheCscript,WinCCalsoprovidestheVBScriptprogramlanguageasaprogramminginterfaceinordertomaketheWinCCRuntimeenvironmentdynamic.

TargetGroupoftheDocumentation

ThisdocumentationisaimedatprojectengineerswithexperienceofVisualBasicorWinCCScriptings（C）usedtodate.

ApplicationOptions

VBScript（VBS）providesaccesstotagsandobjectsofthegraphicalRuntimesystematRuntimeandcanexecutepicture-independentfunctions:

•Tags:

Tagvaluescanbereadandwritteninorder,forexample,tospecifytagvaluesforthePLCbyclickingthemousewhenpositionedonabutton.

•Objects:

Objectpropertiescanbemadedynamicusingactionsandactionscanbetriggeredbyeventsinfluencingobjects.

•Picture-independentActions:

Picture-independentactionscanbetriggeredcyclicallyoraccordingtotagvalues,e.g.forthedailytransferofvaluesintoanExceltable.

VBScanbeusedatthefollowingpointsinWinCC:

•IntheGlobalScriptEditor:

Thisisusedtoconfigurepicture-independentactionsandprocedures.Theprocedurescanbeusedinpicture-dependentandpicture-independentactions.Severalproceduresarecompiledinatopic-relatedmodule.

•InGraphicsDesigner:

Picture-dependentactionscanbeconfiguredwithwhichthepropertiesofgraphicobjectscanbemadedynamicorcausedtorespondtoeventsinRuntime.

ApplicationScenarios

VBScanbeusedinRuntime,forexample:

•toconfiguresetpointvaluespecificationfortagsfortheoperationofagraphicobjectin

ordertodefineavalueforthePLCbyclickingamouse,forexample.

•toconfigureswitchingtheRuntimelanguagefortheoperationofagraphicobject.

•toconfigurethechangeofcolor,e.g.cyclically（flashing）ortodisplaystatuses（motoron）.

ApartfromthespecificWinCCapplications,thegeneralfunctionalityofVBScanalsobe

usedtocustomizetheWindowsenvironment,e.g.:

•totransferdatatoanotherapplication（e.g.Excel）.

•tostartexternalapplicationsfromWinCC.

•tocreatefilesandfolders.

Theautomationobjectsinyourenvironmentareavailablewithwhichtocustomizethe

Windowsenvironment.

Note

AlltheobjectssuppliedwiththeWindowsScriptHost（WSH）fromMicrosoftcanbe

integratedintheenvironmentusingthestandardVBSmethodCreateObject.However,there

isnodirectaccesstotheWSHobjectitselfusingVBSfromWinCC.

ThereisnoguaranteenorWinCCsupportfortheVBSfunctionalitywithregardtoits

adaptationtotheWindowsenvironment.

LimitstoOtherProgrammingLanguagesinWinCC

VBSandC

VBScriptcanbeusedinWinCCparalleltoC-Script,butdonotmixthescripttypes:

•VBScriptsandC-scriptscanbeconfiguredwithinapictureandproject.

•C-scriptscannotbeinvokedinVBScriptsandviceversa.

•VBSprovidesinternalinterfacestotagsandpictureobjectswhiletheCenvironmentenablesaccesstootherWinCCsubsystems（e.g.thereportsystem）.

VBSandVBA

VBAisusedinWinCCConfigurationduringtheconfigurationinordertoadaptGraphicsDesignertoyourindividualrequirementsandtosimplifyandautomateconfiguration.VBAprogramsonlyrunintheWinCCconfigurationenvironment.

AsopposedtoVBA,VBscriptsonlyruninWinCCRuntimeand,fromthere,enableaccesstographicobjectsandtags.ObjectsandpicturescanbeneithercreatednormodifiedonapermanentbasisinVBS,asopposedtoVBA.

Themainlanguage-relateddifferencesbetweenVBAandVBSaree.g.:

•VBSwasdevelopedforuseinInternet,VBAfortheautomationofsoftwareapplications.

•ThedatatypeofVBStagsisalwaysVARIANT.VBA,ontheotherhand,differentiatestheindividualdatatypessuchasINT,DOUBLE,STRING,etc.

•CertainlanguageconstructsfromVBAhavebeenremovedfromoraddedtoVBS.

•ErrorsarehandleddifferentlyinVBScomparedtoVBA.

AcompletelistofthedifferencesbetweenVBAandVBSisprovidedintheAppendixin"BasicPrinciplesofVBScript".

Procedures,ModulesandActions

VBSinWinCCallowstheuseofprocedures,modulesandactionstomaketheRuntimeenvironmentdynamic:

•Procedures:

Codesarestoredinprocedureswhicharethenusedatseveralpointsintheconfiguration.Retrievethecodeoranotherprocedureinanactionbyinvokingtheprocedurename.ProcedurescanbecreatedinWinCCwithorwithoutreturnvalues.

Proceduresdonothavetheirowntrigger,theyarealwaysretrievedbyanaction.

•Modules:

Itisadvantageoustocompilerelatedprocedurestounitsinmodules.Createmodulesforprocedures,forexample,whichmustbeusedinaspecificpictureorbelongtoaspecifictopic,suchasauxiliarymathematicalfunctionsordatabaseaccessfunctions.

•Actions:

Actionsarealwaysactivatedbyatrigger,namelyatriggeringevent.Actionsareconfiguredingraphicobjectproperties,ineventswhichoccuronagraphicobjectorgloballyinaproject.Codesusedseveraltimescanbecalled,intheformofprocedures,inactions.

3.ModulesandProcedures

Introduction

Proceduresareusedtomakecodes,createdonlyonce,availableatseveralpointsinaproject.Insteadofenteringthecodeseveraltimes,simplycallinthecorrespondingprocedure.Thecodeisclearerandeasiertomaintain.

Relatedproceduresshouldbestoredinmodules.WhenacertainprocedureisretrievedviaanactioninRuntime,themodulethatcontainsthatprocedureisloaded.Observethefollowingwhenstructuringthemodulesandprocedures:

•Themoremodulesthatmustbeloadedwhenapictureiscalledin,theworsetheperformanceinRuntime.

•Thelargeramodule,themoreproceduresarecontainedand,thus,thelongertheloadingtimeforthemodule.

Organizethemodulessensibly,e.g.amodulewithproceduresforaspecificsystempart/picture.

Anothertypeofstructuringofproceduresinmodulesisthefunctionalstructuring,e.g.amodulecontainingmathematicalfunctions.Usethisstructure,forexample,formoduleswhichshouldbeusedgloballyforprojects.Thefollowingexampleillustratesamodulecontainingmathematicalfunctionsderivedfromthestandardfunctions:

ProcedureFeatures

TheproceduresinWinCChavethefollowingproperties:

•Theyarecreatedandmodifiedbytheuser.

•Theycanbeprotectedagainstmodificationandviewingbymeansofapassword.

•Theydonothaveatrigger.

•Theyarestoredinamodule.

WinCCdoesnotprovidepredefinedprocedures,butdoesprovidecodetemplatesandIntellisense,forexample,tosimplifyprogramming.Proceduresdifferaccordingtomoduleassignmentin:

•Standardproceduresapplygloballytoprojectslocatedonthecomputeronwhichthey

werecreated.

•Projectprocedurescanonlybeusedintheprojectinwhichtheywerecreated.

ModuleFeatures

Amoduleisafileinwhichoneorproceduresisstored.ThemodulesinWinCChavethe

followingproperties:

•Theycanbeprotectedagainstmodificationandviewingbymeansofapassword.

•Thehavethefileextension*.bmo.

Modulesdifferaccordingtothevalidityoftheirproceduresin:

•StandardModules:

Containprocedureswhicharegloballyavailabletotheproject.StandardmodulesarestoredintheWinCCfilesystemunder:

\ApLib\ScriptLibStd\.bmo

•ProjectModules:

Containproject-specificprocedures.ProjectmodulesarestoredintheWinCCfilesystemunder:

\ScriptLib\.bmo.Sincetheprojectmodulesarestoredintheprojectdirectory,theyarecopiedwhentheWinCCprojectiscopied.

Note

IfWinCCmustbereinstalledandthestandardproceduresandmodulesneedtobeusedagain,savethemodulefilespriortothereinstallationinadifferentdirectoryandcopythemintherelevantWinCCdirectoryafterthereinstallationhasbeencompleted.Otherwise,thestandardmodulesintheWinCCinstallationdirectoryaredeletedduringtheinstallationroutine.

UsingProceduresandModules

Proceduresareusedin:

•Actions（inGraphicsDesignerandGlobalScript）

•Otherprocedures（inGlobalScript）

Proceduresarestructuredinmodules.

4.Actions

Introduction

Anactionisalwaysstartedbyatrigger.Anaction,forexample,istriggeredinRuntimewhenanobjectisoperatedbyamouseclick,acertaintimehasoccurredorataghasbeenmodified.

ActionFeatures

ActionsaredefinedonceinGlobalScriptandthenavailableindependentofthepicture.

GlobalScriptactionsareonlyvalidintheprojectinwhichtheyweredefined.Actionslinkedtoagraphicobjectareonlyvalidinthepictureinwhichtheyweredefined.

Note

VBSdoesnotcurrentlyallowthecreationofcomputer-specificactions.

Thefollowingappliesforclientsinamulti-usersystem:

Allglobalactionsconfiguredona

serverarealsoexecutedonaclientwhenaprojectisopened.

Thefollowingappliestoclientsinadistributedsystem:

Ifactionsshouldbeusedonaclient

computer,copyalltheactionfilesinthecorrespondingprojectdirectoryonthe