IDataSourceDriver.LastError (PROP) ¶ PROPERTY LastError : DWORD Will be valid only if State DataSourceState.DS_Error

IDataSourceDriver.ReadRequest (METH) ¶ METHOD ReadRequest : UDINT InOut: Scope Name Type Return ReadRequest UDINT Input pItems POINTER TO ARRAY [0..100] OF IDataItem iItemCount UDINT dwListId DWORD Output dwTransactionId DWORD

IDataSourceDriver.Reset (METH) ¶ METHOD Reset : UDINT InOut: Scope Name Type Return Reset UDINT

IDataSourceDriver.ShuttingDown (METH) ¶ METHOD ShuttingDown : UDINT InOut: Scope Name Type Return ShuttingDown UDINT

IDataSourceDriver.StartConnect (METH) ¶ METHOD StartConnect : UDINT InOut: Scope Name Type Return StartConnect UDINT

DataSourceShutdownFlags (ENUM) ¶ TYPE DataSourceShutdownFlags : InOut: Name Initial Succeeded 16#0 TimeoutOccurred 16#1

DataSourceState (ENUM) ¶ TYPE DataSourceState : InOut: Name Comment DS_New In this state only Initialize may be called DS_Initialized In this state only StartConnect may be called DS_Connecting While the driver is in this state, Connecting will be called. DS_Ready In this state, the driver is able to execute requests to its datasource. DS_Busy In this state, the driver currently is not able to execute requests to its datasource DS_ShuttingDown In this state only ShuttingDown will be called DS_Shutdown In this state the driver is shutdown and all allocated resources have been released DS_Error In this state the driver encountered an error that it cannot fix itself.

DataSourceTransactionResult (ENUM) ¶ TYPE DataSourceTransactionResult : InOut: Name TR_Ok TR_Pending TR_UnknownTransaction TR_Error

DriverInitConstants (GVL) ¶ InOut: Scope Name Type Initial Constant CustomerMask DWORD 16#FFFF0000 DriverMask DWORD 16#FFFF Customer_Standard WORD 16#0 Driver_Unknown WORD 16#0 Driver_Monitoring_Standard WORD 16#1 Driver_OPC_Standard WORD 16#2 Driver_SymbolicMonitoring_Standard WORD 16#3

DriverInitInfo (STRUCT) ¶ TYPE DriverInitInfo : STRUCT InOut: Name Type Comment dwDataTag DWORD identifies the kind of given initialization data dwDataVersion DWORD for extensibility of the init data dwDataSize DWORD size of the given data, correlated to dwDataVersion