Development of OPC UA based centralized server Fieldbus data high efficiency transmit architecture

In last few years industrial communication system is one of the most important innovations in factory and process automation systems. Many applications of industrial control arc changing as communication technology advances, this also brings new opportunities and challenges to fieldbus system. In this paper, we proposed one new fieldhus data transmit architecture. The proposed architecture includes one OPC UA (OPC Unified Architecture) based centralized server, it used to replace the traditional fieldbus direct connection between fieldbus master station and PLC. The high capacity and high-speed characteristics of OPC UA structure are utilized to realize efficient and high timeliness fieldbus data transmission. Under this architecture, we propose a concept of data converter, it used to provide high compatibility with old and new fieldbus devices to reduce the cost of automation system upgrading. Proposed architecture has obvious advantages in multi PLC joint work environment.