TiVCLComponent.OPCItemActivate
TiVCLComponent
Used to instantiate a connection between the specified OPC Item and the OPC
Server.
procedure OPCItemActivate(Index: Integer);
Description
Use the OPCItemActivate to manually instantiate a connection between the
specified OPC Item and the OPC Server. If you have not already setup the OPC item
with the SetOPCItemComputerName, SetOPCItemServerName, SetOPCItemItemName, and OPCItemPropertyName procedures or have not setup the item through the built-in property editor,
then a connection will not be made.
If you need automatic control over when the connections are made and
disconnected between the Component and the OPC Server, use SetOPCItemAutoConnect procedure to set the AutoConnect property to TRUE so that a connection to the
OPC Server is made automatically during streaming/loading of the component.
Example
Delphi
iComponent.OPCItemActivate(0); //Connect 1st OPC Item
C++ Builder
iComponent->OPCItemActivate(0); //Connect 1st OPC Item
Note: The Index value is 0 based.
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