CAJ | 학술논문

　　交通灯对保障城市交通安全、有序、快捷运行非常重要。利用专为工业环境设计的PLC控制交通灯，运行稳定可靠、抗干扰能力强、控制灵活有效、动作精确、易于维护和检修。本文通过分析控制要求，设计了基于西门子S7-200 PLC一个定时器的交通灯控制的硬件系统和软件系统，适合目前我国交通控制与管理的现状。
　　교통등대보장성시교통안전、유서、쾌첩운행비상중요。이용전위공업배경설계적PLC공제교통등，운행은정가고、항간우능력강、공제령활유효、동작정학、역우유호화검수。본문통과분석공제요구，설계료기우서문자S7-200 PLC일개정시기적교통등공제적경건계통화연건계통，괄합목전아국교통공제여관리적현상。
Traffic lights on the city traffic safety guarantee, orderly, efficient operation is very important. The PLC traffic lights which is specifically designed for industrial environment has characteristics of high reliable, control flexibility, an-ti-interference ability, stable and reliable operation, easy maintenance and repair. This paper designs the hardware and the software of the traffic light control system based on Siemens S7-200 PLC , selected to fulfill control system requisi-tion and adapted to the current traffic control in China.