Current Proceedings on Technology

Yazarlar: Ioan Ungurean, Vasile Gheorghita Gaitan, Nicoleta Cristina Gaitan

Konular:-

Anahtar Kelimeler:SCADA,OPC specifications,WCF,Field bus

Özet: SCADA systems for monitoring and control industrial processes are designed as distributed applications. Usually, these applications integrate data servers who acquire data from industrial processes and clients that allow remote access on this data. In order to achieve a unified development of SCADA applications, the OPC Foundation has defined the OPC specifications. This paper has the main aims to present the f methods used to design and development a data server based on the OPC NET 3.0 specifications, which are defined by the OPC Foundation. These specifications are based on the Windows Communication Foundation, which is a framework primarily used for development of service-oriented application. The paper describes the methods used for the acquisition of information from local industrial networks and how this information is exposed to client application. By developing this application, we demonstrated the portability of communication component that was originally developed for integration into an OPC DA server. Furthermore, the information acquired from the devices connected on the local industrial networks can be distributed to the Internet (OPC DA clasical specifications are limited to a local network due to the use of DCOM technology). Thus, the OPC.NET data server can be executed on a server with public IP (eg. a web server), and the clients can connect to the server via the Internet from anywhere (after authentication and authorization).

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