What component links the History Blocks to the Runtime Database in Historian?

The OLE-DB (Object Linking and Embedding Database) is the correct answer because it serves as a bridge for communication between the AVEVA Historian and external applications or databases, enabling efficient data access and manipulation. In the context of AVEVA Historian, OLE-DB allows for the integration of real-time historical data from the History Blocks into the Runtime Database. This component facilitates the querying and retrieval of historical data in a standardized manner, allowing applications to interface with the Historian efficiently.

OLE-DB support is significant as it helps in managing data retrieval processes, ensuring the applications can access the historical data seamlessly. It is commonly used for connecting different data sources, particularly in scenarios involving real-time data analysis and reporting, making it a vital part of the architecture for linking data blocks to the overall database management system.

Other options like the SQL Connector, Data Mapper, and API Interface may support various forms of data handling and application integration, but they do not specifically serve the same function of linking History Blocks directly to the Runtime Database within the framework of AVEVA Historian, as OLE-DB does. This distinction highlights the importance of OLE-DB in maintaining an efficient data flow and integrity within the Historian environment.