Research And Implementation Of Flexible Manufacturing Systems Based On Fieldbus Of Profibus

With the various needs of society and the market competition growing in intensity during the past 30 years, flexible manufacturing technology is developed extremely quickly, becoming an important component of nowadays' manufacturing enterprise. As an important subsystem of flexible manufacturing system-control system, is accordingly developed to be more automated,intelligent,flexible,accurate and reliable. Establishment of communication network between the device-level and plant-level is essential if the control system to achieve automatic control on the material flow, energy flow and information flow. PROFIBUS technology is a high-speed communication channel of underlying equipments which can effectively improve the FMS real-time information transmission, and ensure the efficient operation of the system if it is applied to the FMS control system.In the paper, research on PROFIBUS of the present state was firstly analyzed. And put forward a proposal that applied the PROFIUBS in to the FMS, which based on the research of the defects lie in the traditional FMS. To realize real-time control of field devices, the control systems of STAR-M_FMS and STAR-JK_FMS ,which were Developed by CIMS institute of Heifei University of Technology, based on PROFIBUS-DP were developed, and communication problems between control center and production site were solved. System configuration, the control scheme of PROFIBUS-DP, communication theory and information real-time control was focused on. S7-300 PLC and WINCC were used as the master stations; S7-200 PLC, ET200 and converter were adopted as the slave stations. The whole system as well as the field devices can be well controlled via PROFIUS-DP , implementing the centralized and distributed control and at the same time the monitor screen dynamically displays the actual situation. It is proved by the practical results that the design of control system is feasible, the entire system runs stably and reliably, and realizes multi-level real-time control.The whole control system's reliability is improved and multi-level real-time control was achieved through the implementation of the program. The application of PROFIBUS enables the processing of the line and control of Logistics as a whole and Hardware design and software programming is modular and standardized. The two systems have been successfully achieved and work well. At the same time, they provide a good experimental condition for teaching, research, experiments and practical activities of the mechatronics.