Opc data Access Automation Specification

4.5.1

 

Summary of Properties 

Parent DefaultRequestedDataType 

DefaultAccessPath 

DefaultIsActive Count 

 

4.5.2

 

Summary of Methods 

Item GetOPCItem 

AddItem 

AddItems Remove  Validate 

SetActive SetClientHandles 

SetDataTypes 

 

Example 

Syntax 

Base  

The following sample code is necessary for the subsequent Visual Basic Examples to be operational.  

 This code is referred to as OPCItemsObjectBase. 

Dim AnOPCServer As OPCServer 

Dim ARealOPCServer As String 

Dim ARealOPCNodeName As String 

Dim AnOPCServerBrowser As OPCBrowser 

Dim MyGroups As OPCGroups 

Dim DefaultGroupUpdateRate As Long 

Dim OneGroup As OPCGroup 

Dim AnOPCItemCollection As OPCItems 

Dim AnOPCItem As OPCItem 

Dim ClientHandles(100) As Long 

Dim AnOPCItemIDs(100) As String 

Dim AnOPCItemServerHandles(10) As Long 

Dim AnOPCItemServerErrors() As Long 

Set AnOPCServer = New OPCServer 

ARealOPCServer = “VendorX.DataAccessCustomServer” 

63 

 

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OPC Data Access Automation Specification2.02 

ARealOPCNodeName = “SomeComputerNodeName” 

AnOPCServer.Connect(ARealOPCServer, ARealOPCNodeName) 

Set MyGroups = AnOPCServer.OPCGroups 

MyGroups.DefaultGroupIsActive = True 

Set OneGroup = MyGroups.Add( “AnOPCGroupName” ) 

Set AnOPCItemCollection = OneGroup.OPCItems