ABB DCS培训课程T31512 User defined FB TypesRevAWord文件下载.docx

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