2.3 Management and Control – Integrated environment and system

Based on the increasing horizontal data exchange between systems and the increasing vertical data exchange between the control system and the management and field instrumentation, the application of fieldbus is more and more extensive, and the products of manufacturers are increasingly open. As a result of the coexistence of a variety of buses has become inevitable, the management and control system to establish unified data management, unified communication, unified configuration and programming software integrated solution has been paid attention to by the manufacturers. At the same time, the use of distributed network system, C/S or B/S structure, can realize the functional model of the enterprise at all levels at the same time, the network connection in the structure of simplification, so as to form a real-time and relational database as the center of the data integration environment, for the realization of data resource sharing has laid the foundation.

As mentioned above, in the situation of multi-bus coexistence, system integration becomes the central task to realize the management and control integrated information system. System integration is to connect the fieldbus products of the same or different manufacturers to each other according to certain methods and strategies, and to complete two-way data communication between the upper application and the lower field equipment, so that it can become a whole to meet the needs of users. Therefore, system integration includes both hardware product integration and software product integration.

FBM230 P0926GU

FBM230 P0926GU

FBM230 P0926GU

For hardware integration, it is necessary to use bridge, gateway communication bus interface. Generally, Repeaters are used to extend network segments of the same bus, and Bridges are used to connect network segments with different rates. Gateways are used to connect different types of bus network segments and heterogeneous networks such as fieldbus and Ethernet. For example, when the company is far away from the production plant or other departments, public data network or telephone network is used to connect the local area network. This is often encountered in the water industry of urban sewage treatment and interception system, between water plants and water supply network dispatching system. Therefore, it can be predicted that this kind of communication interface products will become very popular in the future. In terms of software integration, OPC, ODBC and other technologies enable accurate, high-speed and large amounts of data exchange between different systems, and can integrate real-time control, visual operation, information analysis, system diagnosis and other functions into a compact software package. With a great deal of hardware flexibility, and can provide connectivity with a variety of management software, which can be more economical to solve the connection between control systems.

At present, various countries are competing to develop their own fieldbus technology and products, forming enterprise information system based on fieldbus integrated solutions. At present, products have been launched, such as Siemens PCS7 based on Profibus bus, Rosemont Plantweb based on FF bus, etc., and the management and control integration software includes Think&DO of Shentcom and iFIX of Lntellntion.