DDESuiteLinkClient Object.docx
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DDESuiteLinkClient Object.docx
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DDESuiteLinkClientObject
DDESuiteLinkClientObject
TheDDESuiteLinkClientobjectfunctionsastheArchestrADDE/SuiteLinkClientforthird-partyDDEServersandWonderware™I/OServersthroughDDEandSuiteLinkprotocols.
Formoreinformation,clickonaHelptopic.
∙Overview
∙Run-TimeBehavior
∙Configuration
∙Run-TimeObjectAttributes
Overview
TheDDESuiteLinkClientobjectisakeymemberofthecoresetofAutomationObjectswithintheArchestrAsysteminfrastructure.TheDDESuiteLinkClientobjectisaDeviceIntegrationobjectthatallowsaccesstoarunningI/OServer.ADDEorSuiteLinkI/OServercanprovidedatapointstoGalaxyapplicationobjectsthroughtheDDESuiteLinkClientobject.
NoteTheDDESuiteLinkClientobjectiscompatiblewithallFactorySuite™2000versionI/OServersandcomponents.
Thereisaone-to-onerelationshipbetweenaninstanceoftheDDESuiteLinkClientobjectandarunningI/OServer.IfyouwanttoreferencedatapointsinmorethanoneI/OServer,youmustconfigureanddeploymorethanoneDDESuiteLinkClientobject.Forexample,youwouldneedtoconfigureoneDDESuiteLinkClientobjecttocommunicatetoanABTCPI/OServerandanotheronetotalktotheGEHCSI/OServer.
WhenyouconfiguretheDDESuiteLinkClientobject,youcanspecifyoneormoreI/OServertopicstowhichaccessisrequired.Atruntime,allitemsthattheGalaxyapplicationrequiresforaspecifiedtopicwillbeupdatedwiththelatestvaluesfromtheI/OServer.TherateatwhichthevaluesareupdateddependsonhowthetopicswereconfiguredwithinthetargetI/OServer.
IfyouwanttoconnecttoaDDEI/OServer,youwillneedtospecifylogininformationthattheDDESuiteLinkClientobjectwillusetoconnecttotheI/OServer.
Fromotherobjectsandfromscripts,youcanreferencethetopicsyouconfiguredfortheDDESuiteLinkClientobject.Forexample,youmightconfiguretheinputsourceforaFieldReferenceobjecttoreferenceanitemforoneofthetopics.Thus,theFieldReferenceobjectinputsourcewouldbereceivingdatafromanI/OServerviatheDDESuiteLinkClientobject.
Toaidinrapidapplicationdevelopment,youcancreatealistoftopicitemsthatwillappearintheArchestrAAttributeBrowser.Todothis,youwillneedtospecifytheitemaddressandassociateitwithauser-definedattributename(alias).CreatingtheitemlistisnotrequiredinordertoreferencedatafromtheI/OServer.
ThereferencesyntaxforaDDESuiteLinkClientobjectdatapointis:
OR
The
EachI/OtopicforaDDESuiteLinkClientobjectisalsoknownasa"scangroup."Run-timeobjectattributesallowyoutomonitorerrorsrelatedtothedataqualityforitemvaluesinascangroup.
Itemsinascangroupare“dynamic”inthattheyarecreatedoractivateddynamicallyduringruntime.
IftheI/OServerprovidestimewithvalueandquality(VTQ),thetimestampfromtheI/OServerisusedtoupdatetheattribute.Otherwise,thecurrenttimeprovidedbythehostingAppEngineisused.Ifthequalityforadynamicattributechanges,butthedatavaluedoesnotchange,thecurrenttimeprovidedbythehostingAppEngineisused.WhenapokerequestisreceivedforaBlockWriteitem,thetimestampprovidedisusedtoupdatetheattribute.Otherwise,thecurrenttimeofthehostingAppEngineisused.
Forgeneralinformationonobjects,includingrelationships,deployment,andalarmdistribution,seetheIntegratedDevelopmentEnvironment(IDE)documentation.
Forinformationonconfigurationoptionsforobjectinformation,scripts,user-definedattributes(UDAs),orattributeextensions,clickExtensionsHelpintheHelpfileheader.
RelatedTopics
Run-TimeBehavior
Configuration
Run-TimeObjectAttributes
TerminalServicesorRemoteDesktopConsiderations
WhenconfiguringtheDDESuiteLinkClientobjectforDDE,makesurethattheDDEServerisstartedandrunninginthesamesessionastheDDESuiteLinkClientobject.OnewaytoaccomplishthisistoconfiguretheDDEServertorunasaservice.YoucouldalsoincludetheDDEServerintheWindowsstartupfolder.
RelatedTopics
Configuration
Run-TimeBehavior
Thefollowinginformationdescribestherun-timebehaviorofDDESuiteLinkClientobjects.Run-timebehaviorislimitedtothestateofindividualDDESuiteLinkClientobjects.
Afterithasbeendeployedandisoperating,aDDESuiteLinkClientobjectcanassumeoneofseveralstates,whicharedescribedinthefollowingtable:
StateChange
Behavior
Startup
Inthisstate,theDDESuiteLinkClientobjectconnectstotheI/OServer.
Goingonscan
None.
Runningonscan
Inthisstate,theDDESuiteLinkClientobject:
∙StartstheWonderwareNetDDEHelperservice,iftheselectedcommunicationprotocolisDDE.
∙ServicesreadandwriterequestsfortagvaluesinthetargetI/OServer.
∙ReceivesvaluesfromtheI/OServer.
∙SendsvaluestotheI/OServer.
∙ReceivesvaluesfromtheI/OServertopics.
∙MonitorsandcontrolstheconnectiontotheI/OServer.
∙Detectsalarmconditions,ifalarmingisenabled.
∙MonitorsthedataqualityforI/OServerdatavaluesandupdatesrun-timeerrorstatisticsifthequalityisnotGOOD.
Goingoffscan
None.
Offscan
Inthisstate,theobjectispassive,andreadsandwritestotheI/OServerarenotenabled.
Shutdown
Inthisstate,theDDESuiteLinkClientobject:
∙DisconnectsfromtheI/OServer.
∙ReleasesthesecurityfortheDDEuser,ifused.
RelatedTopics
Overview
Configuration
Run-TimeObjectAttributes
Configuration
Thefollowingsectiondescribestheobjecteditoroptionsforconfigurationandtheassociatedattributes:
∙GeneralConfiguration
∙TopicConfiguration
Forgeneralinformationonobjects,includingrelationships,deployment,andalarmdistribution,seetheIntegratedDevelopmentEnvironment(IDE)documentation.
Forinformationonconfigurationoptionsforobjectinformation,scripts,user-definedattributes(UDAs),orattributeextensions,clickExtensionsHelpintheHelpfileheader.
RelatedTopics
Overview
Run-TimeBehavior
Run-TimeObjectAttributes
GeneralConfiguration
UsetheGeneraltabtoconfiguretheI/OServerfromwhichtoretrievedataandtoenablealarmingforthedataconnection.ForDDEI/OServers,youcanalsoconfiguretheDDElogin.
EditorOption
AssociatedAttribute
Description
Run-TimeAccess(Supervisory,User,Read-Only,None)
Servernode
ServerNode
Thenameofthenode(computer)onwhichtheI/OServerisrunning.Ifthisattributeisblank,theI/OServerisassumedtoberunningonthelocalnode.
Clicktheellipsisbuttontobrowsethenetworkforthenode.
Youwillneedtospecify"localhost"(withoutthequotationmarks)fortheservernodeandSuiteLinkasthecommunicationprotocolifthefollowingscenarioapplies:
∙TheI/OServerisrunningonthelocalnode.
∙WonderwareHistorianisconfiguredasthehistorian.
Thisway,ifthelocalnodeisdisconnectedfromtheWonderwareHistoriannode,datawillbestoredlocallyandthenforwardedtotheWonderwareHistorianwhentheconnectionisrestored.
Supervisory,User
Servername
ServerName
ThenameoftheI/OServerexecutable.
Supervisory,User
Detectconnectionalarm
ConnectionAlarm.Alarmed
Ifenabled,analarmwillbetriggeredwhentheDDESuiteLinkClientobjectcannolongercommunicatewiththeI/OServer.
None
Priority
ConnectionAlarm.Priority
SeeAlarmAttributes.
Supervisory,User
Communicationprotocol
CommunicationProtocol
TheprotocoltobeusedtocommunicatewiththeI/OServer,eitherDDEorSuiteLink.
Read-Only
UseArchestrAuser
DDEUseDefaultUser
Ifselected,theArchestrAsecuritylogin(configuredduringArchestrAinstallation)willbeusedfortheDDElogin.
Read-Only
Domainname
DDEDomainName
ThenameofthedomainfortheDDElogin.
Read-Only
User
DDEUser
TheusernamefortheDDElogin.
Read-Only
Password
DDEPassword
ThepasswordfortheDDElogin.
Read-Only
Reconnectsecurity
Reconnect
UsedtosetsecurityforreconnectionstotheI/OServer.
Supervisory,User
RelatedTopics
Configuration
TopicConfiguration
UsetheTopictabtospecifytopicsfromwhichtheDDESuiteLinkClientobjectwillreceivedata.
EditorOption
AssociatedAttribute
Description
Run-TimeAccess(Supervisory,User,Read-Only,None)
Topic
ScanGroupList
ThenamesofthetopicsintheI/OServerfromwhichyouwanttoreceivedata.
UsetheAdd(plussign)buttontoaddtopicstothelist.Youwillneedtotypeinthetopicnames.Todeleteatopic,selectthetopicinthelistandclicktheDelete(crosssign)button.
Read-Only
ScanMode
ScanMode
Thescanningmodeforthescangroup,eitherActiveOnDemand,Active,orActiveAll.FortheActiveOnDemandmode,attributesthatarenotactivelybeingreferencedbyanyclientorobjectarenotscanned.FortheActivemode,anattributeisalwaysintheactivescanningstate.Whenthelastreferencetotheattributeisunregistered(unadvised),theattributeisdeleted.ForActiveAll,anattributeisalwaysintheactivescanningstate,butwhenthelastreferencetotheattributeisunregistered(unadvised),theattributeisnotdeleted.
Supervisory,User
Attribute
ScanGroup.ItemList
Auser-definednameforanitemreference.Thisnameisalsoknownasthealias.Themaximumnumberofattributesthatcanbepreconfiguredis5000.
None
ItemReference
ScanGroup._AliasReference
TheitemaddressintheI/OServer.
None
importbutton
Clicktoimportitemdatafroma.csvfileforthes
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