Research And Development Of Real-Time Data Communication System Of 1# AHF & RH In Steel-making Plant At Benxi Iron And Steel (Group) Co., LTD

With the rapid development of technologies of computer, network and communication, the national and international steel enterprises put forward the higher request to their automation and informatization construction in order to increase efficiency and enhance competitive ability. They want to construct the automation and informatization of enterprise by making use of the powerful functions of computer and achieve the aim of the integration of management and control finally. In the process of the automation and informatization construction of enterprise, a good deal of enterprises don't want their old basic automation devices to be replaced entirely. One side, these devices are still running normally, and can be satisfied with the requirement of production very well. On the other hand, if these old devices are replaced entirely, it will spend lots of money and extend the period of development. Even, it will break the daily production of enterprise seriously. So most of enterprises want to find a good method to solve this problem. They hope this method can improve and upgrade automation system on the foundation of reserving the old basic automation devices. And achieve the integration between the automation control system and management information system of enterprise.In view of the above-mentioned problem, this thesis introduces the solution which can solve the problem commendably by developing a real-time data communication system between level 1 and level 2 automation system of enterprise. Using the steel-making plant at Benxi Iron and Steel (Group) Co., LTD. as the background, it analyzes the problem which is about the information of production can't be transmitted from level 1 to level 2 automation system of 1# AHF & RH in steel-making plant. The automation system is improved on the foundation of reserving the old PLC devices of SIMENS S5-155U. It designs and develops the real-time data communication system, and achieves real-time communication between level 1 and level 2 automation system of 1# AHF & RH finally. This system connects S5-155U of the level 1 automation system with the process control computer of the level 2 automation system by technology of industrial Ethernet. The process control computer of the level 2 automation system collects the data of production from S5-155U of the level 1 automation system by the configuration software. The real-time data communication software is programmed by using the technology of OPC, which can collect the data formconfiguration software and send the data to the server of Oracle database which is in the level 2 automation system immediately. Through this process, the real-time data communication system achieves the aim of real-time communication between level 1 and level 2 automation system of 1# AHF & RH in steel-making plant.At present, the test for real-time data communication system has been past in the simulative condition. In the testing process, the system is running stability, and its function is integrated, capability is credible. It is satisfied with the need of the steel-making plant, and be approbated by the enterprise.