Based on the design of Siemens S7-200 traffic
control
ABSTRACT
Since the birth of traffic lights，the circuit in its internal control
system have continually been improved，also began to design methods
varied，so that traffic lights become more intelligent. In particular，in
recent years，with electronics and the rapid development of computer
technology，electronic circuit analysis and design methods have greatly
improved，electronic design automation has become a modern electronic
system in an indispensable tool and means now ， PLC today's rapid
technological development ， has become an increasingly widespread
applications in industrial automation position is extremely important，
widely used in various industries. With the development of science and
technology，programmable controllers improvement of the function，
together with the small ， low-price ， high reliability in the modern
industry of a more prominent role，And more traffic control Trend is the
development of intelligent ， LED traffic lights in the continuing
luminescence，rain，dust and other adverse weather conditions，can still
maintain good work performance and lower prices. In this paper ，
Siemens Programmable Logic Controller control traffic through the traffic
