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Fieldbus technology is a hot technology in today's society, the fieldbus technology is applied to the automobile industry has become a trend, field bus technology is widely used in the automobile production process, such as body shop body welding using INTERBUS fieldbus, paint shop, body spraying using the PROFIBUS fieldbus assembly shop body assembly using the ProfiNet well PROFIBUS fieldbus. In this paper, the actual production of the domestic automobile plant assembly shop, fieldbus technology analysis and research, especially for Siemens PROFIBUS fieldbus detailed description, including the structure of its agreement, the master-slave process as well as the main station and the slave communication. In view of the special environment of the automobile plant, how to make the system stable and secure running to become the primary consideration of the design system conditions. After the completion of the system design, system research is also necessary, such as anti-jamming technology, communication technology improvements and upgrades of the system is important. The focus of this article or control system is introduced automobile plant assembly shop, articles from the introduction of the system, several aspects of the hardware design, software design and system functions on the system a comprehensive analysis and research. The hardware system involves a brief introduction, including the project's design rules, and hardware selection; system development by using the software in this article also have introduced, in particular, to monitor the use of the WinCC software carried out the report focuses mainly, on the upper monitoring system of The feature focuses on. S7 and WinCC software design of the system is the focus, the S7 function as well as the use of introduced. The Siemens PROFIBUS fieldbus control system with the perfect fusion of S7-400PLC control system and monitoring software Siemens WinCC system, making on-site control and monitoring more perfect, Siemens has introduced the PCS 7 PCS 7 has S7 and WinCC perfect fusion together, which makes the work more convenient in the system functions software development user. The system design using the leading technology in the world: DP slave address switching technology, from the station's address is not the initial allocation of fixed value, but with the running of the system to obtain an address automatically, this design enables the master and slave communication time between the shorter, more efficient, and makes the car transported beat faster to meet the requirements of the automobile plant productivity and process.
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