OPC DA connector

The OLE Process Control Data Access (OPC DA) connector library provides connection to and data retrieval from OPC DA v2.0-compliant servers.

Elements

The OPC connector library contains the following items:

• Data source

• Data connection

• Group

• Variable

OPC DA connector guidelines

• The OPC DA connector supports only OPC Data Access v2.0-compliant servers.

• Verify that the OPC server is installed as a service rather than a WinForms application.

Connecting and disconnecting

• Start an OPC DA data source to initiate connection to the respective OPC DA server.

• Stop an OPC DA data source to disconnect it from the respective OPC DA server.

• If a running connector becomes disconnected, it attempts to reconnect as soon as possible. When the connector reconnects, it resumes its operations.

Related topics

• Add and configure an OPC DA data source

• Add and configure an OPC DATA data connection

• Add and configure an OPC DA group

• Add and configure an OPC DA variable