ABB DCS培训课程T31512 User defined FB TypesRevAWord文件下载.docx
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ABB DCS培训课程T31512 User defined FB TypesRevAWord文件下载.docx
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12.3Versioning8
12.3.1LibraryStates8
12.3.2HowtoReleaseaLibary9
12.3.3HowtoCreateaNewVersion9
12.3.4WorkwithDifferentVersions10
12.3.5HowtoUpgradeaLibrary11
12.3.6Protection12
12.4FunctionBlocksTypes13
12.4.1HowtoCreateaFunctionBlockType13
12.4.2FunctionBlockTypeEditor14
12.4.3ParameterorVariable15
12.4.4Protectionofcode16
12.4.5HowtoCopyaFunctionBlockType17
12.5ObjectTypeStructure19
12.5.1ProjectExplorerandEngineeringWorkplace20
12.5.2ObjectTypes21
12.1GeneralInformation
12.1.1Objectives
Oncompletionofthischapteryouwillbeableto:
∙Createandhandleprojectspecificlibraries
∙CreateuserdefinedFBtypes
∙Specifyparameters
∙UseownFBtypesinapplications
∙IdentifyFBtypeinPlantExplorer
12.1.2Legend
<
>
Indicatesakeyname.
|Indicateswhenyougofromonemenutoasub-menu.
BoldIndicatesamenunameoranoptioninamenu,orfilestructures
““Indicatesdialogboxbuttons,tabs,instructionsetc.
Indicatesstart/explanationofstudentactivity
12.2
Librarymanagement.
12.2.1Overview
System800xAprovidesuswithmanypredefinedlibrarieswhichincludefunctionblocktypesandcontrolmodulestypeslikevalves,motors,PIDetc.forengineeringyourcontrollogicforyourplant.
Fromtheuserpointofview,therearetwomaintypesoflibrary:
∙Standardlibraries,thatareinstalledwiththeproduct.Theseareprotectedandcannotbechanged.
∙Yourownlibraries,inwhichyoucanaddyourowntypesandmodifycopiesoftemplatetypesfromthestandardlibraries.
Thesystemsupportsdevelopment,distributionandmanagementofversionedlibraries.TheAspectDirectoryisthebaseplaceforthelibraryhandling,butsomeoperationsarealsoavailableintheControlBuilder.
TheLibraryHandlingintheAspectDirectoryishandledintwostructures:
∙LibraryStructureisthemainplacewheretodealwiththeoperationsofthelibrarieslikeopen,closeorwheretoconnectdifferentlibrariestothelibrary.
∙ObjectTypeStructureisthestructurewheretobuildtheindividualobjecttypes,likeFunctionBlockTypes,ControlModuleTypesandDataTypes.
Butadditionallythe800xAsystemallowsustocreateourownspecializedlibraries.Hereyoucanusefunctionblocktypesor/andcontrolmoduletypes.
12.2.2
Rules
Whenworkingwithlibraries,itisimportanttobeawareofhowlibrariesareversionhandled,howlibrariesareconnected,andwhathappensifacertainlibraryischanged.
Thefollowingimportantrulesapply:
∙Librariesmayexistindifferentversionsinthesameproject(butnotinthesameapplication).
∙LibraryversionsareindexedusingMajorVersion.MinorVersion-Revision,forexample,BasicLib1.2-3.Anewlibraryhastheinitialversionnumber1.0-0.
∙Librariesmaydependoneachotherinanumberoflayers.
∙Circulardependenciesarenotallowed.ControlBuilderchecksforcirculardependenciesandwillwarnyouifyoutrytoconnectalibrarythatwouldcreateone.
∙LibrariescanbeexportedandimportedusingtheImport/ExporttoolinPlantExplorer.Childlibrariescanbeexcludedorincluded.
∙Standardlibrariescannotbechangedbytheuser.Thisappliestoboththelibraryitselfandthetypesinside.
12.2.3
TypeSolutions
Atypeisusedtocreateinstances,inanobject-orientedmanner.Eachinstancepointstothetypeitisbasedon,whichmeansthatwhenaninstanceisexecuted,itisreallythecodestoredinthetypethatisexecuted,butvariablesandotherdataisinstance-specific.
Thefactthatitisthesamecodethatexecutesinallinstancesisthepointofthewholetypeconcept,fortworeasons:
∙Instances(oftencalledobjects)inheritthepropertiesfromtheirtype.Thisallowsre-useandmakesyourautomationsolutionflexible,sincethebehavioroflargenumbersofinstancescanbechangedbychangingthetype.
∙Thememoryconsumptionforeachinstanceissmaller,comparedtothememoryneededtoexecutethetypeitself.Forexample,aMotorUnifunctionblocktypeconsumesabout40kB,whileeachadditionalinstanceonlyneedsanother7kB.
NOTE!
Thatyoucanusetypesfromanotherlibrarywhenbuildingtypes,aslongasyouconnectthislibrarytoyourapplicationand/orlibrary.
Thismeansthatchangesmadetoatypeaffectallinstances.Thisisaveryimportantconcept!
Ifyoucreatetypesonaveryhighlevel,youmightrunintoproblemswhenyouwanttochangesomethingforaparticularobject,duetothefactthatthischangewillaffectotherobjectsofthesametype.Thiscanpartlybesolvedbyincludingcopiesofcertaintypes,whichcanthenbechangedwithoutaffectingthecorrespondingpartofothertypes.However,thepriceforcopyingcertaintypesisincreasedmemoryconsumption,aswellasanincreasedriskofproblemswhenupgradingtypesandlibraries.
Userdefinedfunctionblocksareusuallycreatedinlibraries.Instancesofthetypemaythenbeusedintheapplicationstowhichthatlibraryisconnected.
12.2.4
HowtoCreateaLibrary
UsetheControlBuildertocreateanewControlLibrary.
1.OpentheControlBuilderwiththeprojectwhereyouwanttocreatealibrary.
2.SelecttheLibraryfolderfromthetreeandopentheContextMenuforit(rightclickontotheobject).Select“NewLibrary…”fromthelist.
3.Typeinthenewlibrarynameandclick“OK”.
4.UsetheControlBuildertoconnectotherlibrariestothenewcreatedlibrary.SelecttheConnectedLibrariesfolderandopentheContextMenuforit.
5.Selectthelibrarywhichshouldbeconnectedfromthelistandclick“OK”.
12.2.5
HowtoConnectaLibrarytoanApplication
Togetaccesstolibraryelements(likeafunctionblocktype)inyourapplicationyouhavetoconnectthelibraryfirst.UsetheControlBuildertoconnectalibrarytoanapplication.
6.OpentheControlBuilderproject.
7.SelecttheApplicationforwhichyouwanttoconnectaControlLibrary.
8.FromtheApplicationfolderselecttheobjectConnectedLibraries.OpentheContextMenuforitandselect“ConnectLibrary”.
9.SelecttheLibraryfromthelistandclick“OK”.TheLibraryisnowconnectedtotheApplication.
12.3
Versioning
12.3.1LibraryStates
ALibraryVersionhasadevelopmentstate.Thisstateisusedtodescribehowalibrary(version)canbeused.Thestatesalibrarycanbeinare:
∙Open
∙Closed
∙Released
IntheopenstatethecontentsoftheLibraryVersionmaybeedited.Wheneditingtemporarilyiscompleted,thelibrarycanbeclosed.
WhenaLibraryisclosedthenitcannotbeeditedbutitcanbereopenedtoallowadditionaledits.
WhenaLibraryVersionhasbeenreleasedthenitcannolongerbechanged.Ifanymodificationsarenecessarythenanewversionofthelibrarymustbecreated.
Notethatalibrarycannotbereleasedunlessalllibrariesitdependsonarereleased.
12.3.2
HowtoReleaseaLibary
UsetheEngineeringWorkplacetoreleasealibrary.
10.OpentheObjectTypeStructureandselectyourlibrary.SelecttheaspectLibraryVersionDefinitionandopentheConfigViewforit.
11.Selectthetabcard“General”fromtheConfigView.ClosethelibrarybyselectingthestateCloseandclick“Apply”tosavethechanges
12.Inthisstateyouareabletoopenthelibraryagain.PleasetrythisandafterthisselecttheClosestatelikebefore.
13.AfteralibrarywassettoclosetheReleasestateisfreetoselect.Afterclicking“Apply”theotherstatesofthislibraryarelockedandwillnotgetactiveagain.
Theonlywaytochangesomethinginthislibraryistocreateanewversionofit.
12.3.3HowtoCreateaNewVersion
UsetheEngineeringWorkplaceandtheLibraryStructuretocreateanewversionofalibrary.
14.OpentheLibraryStructureandselectyourlibraryobject.Createanewobjectforit.IntheNewObject…dialogthenamefieldisgrayedout,becausethesystemknowsthatwewanttocreateanewversionofourlibrary.
15.FillintheVersionfieldanewnumber.Wecanseeontheexampleabovethattheversionwasalreadyincreasedtoversion1.1-0(theoldversionis1.0-0).
16.
Acceptallthisbyclicking“Create”andanewversionwillbecreated.
17.Allversionsarevisible..Ifwecomparetheoldversionwiththenewwecanseethatthenewversionisacopyoftheold.ThedifferenceisthatthenewversiongotthestateOpen.
12.3.4WorkwithDifferentVersions
RightnowwehavetwoversionsofthelibraryProjectLib_ABBconnectedtotheprojectProject_xx.Whatisdifferentnow?
∙ControlApplication
Eachlibrarycanonlybeconnectedtoanapplicationonce(!
!
).Therecannotbetwoversionsofalibraryconnectedtooneapplication.
∙Instantiation
Ifyouwanttoinstantiateanobject,e.g.aFunctionBlock,youhavetochoosetheversionofthelibrary,fromwhereyouwanttogetyourFunctionBlockType.
12.3.5
HowtoUpgradeaLibrary
TheobjecttypesofthepreviousandthenewversionscoexistintheObjectTypeStructure.ThecustomerhasapossibilitytocarryoutanupgradeofthechoseninstancesofthepreviousLibraryVersiontothenewone.
Thiscanbedoneusingthe“Library”tabintheConfigViewoftheApplicationaspectofaControlApplicationintheEngineeringWorkplaceorusingtheConnectLibraryfunctionintheControlBuilder.
Theupgradeproces
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