TiPlotChannelCustom.OPCActivate
TiPlotChannelCustom
Used to instantiate a connection between the Channel and the OPC Server.
procedure OPCActivate;
Description
Use the OPCActivate to manually instantiate a connection between the Channel
and the OPC Server. If you have not already setup the channel with the OPCComputerName, OPCServerName, and OPCItemName properties 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 Channel and the OPC Server, set the OPCAutoConnect property to TRUE so that a connection to the OPC Server is made automatically
during streaming/loading of the component.
Data Update
A data point is added to the chart whenever data is received from an OPC Item
specified b the OPCItemName property. The Y-Value is obtained from the incoming OPC Item data and the
X-Value is obtained depending on the value specified for the OPCXValueSource property for the TiPlot component, and is specified by the OPC Server's TimeStamp for the TiXYPlot component.
Example
Delphi
iComponent.Channel[0].OPCActivate; //Instantiates Connection to OPC Server
C++ Builder
iComponent->Channel[0]->OPCActivate(); //Instantiates Connection to OPC Server
Note: CLX Components do not support OPC Features.
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