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Process Automation Using OPC

Author: Svoboda Tomas

This thesis describes the implementation of historical data server according to OPC Historical Data Access 1.0 specification. Only the interface for synchronous data reading is implemented from the optional part of this specification. Database for storing the historical data is created under MySQL database server. There is also implemented the client for graphical representation of data provided by OPC HDA servers and tools for recording process data to the database.

Theoretical part contains brief description of Microsoft COM technology, used OPC specifications and the structure of the database for process data. Some theory of database design, the way of communication with database server and description of created applications is also mentioned.