Prerequisites

Verify Communication

Communication between the OPC server and an OPC client must be verified. Some OPC Server vendors provide OPC clients with their servers. These clients can be used to validate.

If an OPC client is not provided with the server, download a test client such as UAExpert OPC UA client from Unified Automation to verify connectivity and data retrieval from the OPC UA HA server.

To retrieve historical data with UA Expert, first identify a variable (tag) that has the Historizing attribute set true. Then, from the Document menu select Add. Set Document Type to History Trend View and click Add. The trend can display any variable added to the Configuration section.