Design of Urban Traffic Control System Based On Profibus
Abstract: Nowadays,as the development of information technology, the traditional way of monitor and control has been influenced deeply.Fieldbus technology is becoming more and more popular because of its simpleness in structure and control in distane and diagnose in distance and high reliability and openness. Control system based on Fieldbus(FCS) has caused an epoch-making change in Industry control realm. Traffic signal is an essential element to manage the transportation network. Nevertheless,it is widely accepted that the benefits of traffic control systems are not being fully realized.Along with the movement of intelligent transportation system(ITS),traffic control remains one of the most heavily funded research and development items. First, this paper introduced the present condition of Fieldbus and the Profibus technology, and then a traffic control system based on PROPIBUS-DP was designed.The hardware arrangement of system was analyzed , the definite and detailed table of components and the texture figure of hardware were introduced. The agreement structure of PROFIBUS and the memory agreement were given. Every objection controlled by the system was also introduced; The installment sequence of PLC module, arrangement of address , the table of Siemens variable and the arrangement of RAM were analyzed,too. And programs and the explanation in concise were designed.
Key Words :Fieldbus; PROFIBUS;Traffic Control