The Reasearch Of OPC DA Server And The Application In CAN Control System Integration

OPC (OLE for Process Control) is an industry standard to realize the information-sharing between intelligent devices and control systems. And now, it has been widely applied to various fields of industrial process control. However, along with the applications extending and the new techniques adopting, OPC technology is continuously developing and improving. Consequently, it's a significant thing to improve the technology level of native automatization industry by tracking and studying OPC technology as well as extending its application.The main content as follows: The evolution of OPC technology is illustrated in this thesis. Through the analysis of application and research situation at home and abroad, it demonstrates the essentiality of OPC. Moreover, the system structure of OPC is studied in detail, and the application fields of OPC specifications are explained. Emphatically, the OPC DA (Data Access) Specification is analyzed. The method of developing OPC DA Server using the Delphi 7.0 is researched. In addition, an OPC DA Server for CAN field bus control system is constructed. Finally, The OPC DA Server for the automation control system, which is fulfilled in this thesis, is tested by the standard industrial client software MatrikonOPC Explorer. It shows that the OPC DA Server can collect data from automation control system, as well as the DA Server and the Client can share information in compliance with OPC DA specification. OPC technology simplifies the integration of control system because its interoperability, extendability and openability. The thesis provides a beneficial reference for application and research of OPC technology, and also establishes the foundation for the further research of OPC technology.