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1、HistoricalDataAccessAutomationInterfaceStandardVersion1.0January26,2001OPCHistoricalDataAccessAutomationSpecification1.0Synopsis:ThisspecificationisaninterfacefordevelopersofOPCclientsandOPCHistoricalDataAccessServers.Thespecificationisaresultofananalysisanddesign
2、processtodevelopastandardinterfacetofacilitatethedevelopmentofserversandclientsbymultiplevendorsthatshallinter-operateseamlesslytogether.ThisdocumentdefinestheOPCHistoricalDataAccessOLEAutomationinterfacefordevelopersofOPCclientsandOPCHistoricalDataAccessServers.T
3、hepurposeofthisspecificationistoprovideanOLEAutomationinterfacefortheOPCHistoricalDataAccessServerCustomInterfaceFunctionalityDocumentationTypeIndustryStandardSpecificationTitle:OPCHistoricalDataAccessDate:January26,2001AutomationSpecificationVersion:1.0SoftMS-Wor
4、dSource:OPCHDA_Auto.docAuthor:OPCFoundationStatus:ReleasedTrademarks:Mostcomputerandsoftwarebrandnameshavetrademarksorregisteredtrademarks.Theindividualtrademarkshavenotbeenlistedhere.RequiredRuntimeEnvironment:ThisspecificationrequiresWindows95/98(withDCOMinstall
5、ed),WindowsNT4.0orlater.ItisrecommendedthatWindowsNT4.0machinesberunwithSP3,orlater.2OPCHistoricalDataAccessAutomationSpecification1.0NON-EXCLUSIVELICENSEAGREEMENTTheOPCFoundation,anon-profitcorporation(the“OPCFoundation”),hasestablishedasetofstandardOLE/COMinterf
6、aceprotocolsintendedtofostergreaterinteroperabilitybetweenautomation/controlapplications,fieldsystems/devices,andbusiness/officeapplicationsintheprocesscontrolindustry.ThecurrentOPCspecifications,prototypesoftwareexamplesandrelateddocumentation(collectively,the“OP
7、CMaterials”),formasetofstandardOLE/COMinterfaceprotocolsbaseduponthefunctionalrequirementsofMicrosoft’sOLE/COMtechnology.Suchtechnologydefinesstandardobjects,methods,andpropertiesforserversofreal-timeinformationlikedistributedprocesssystems,programmablelogiccontro
8、llers,smartfielddevicesandanalyzersinordertocommunicatetheinformationthatsuchserverscontaintostandardOLE/COMcomplianttechnologiesenableddevices(e.g.,ser
