摘要
以十字路口交通灯控制系统为例,详细介绍了交通灯的正常运行和急车强通运行情况,通过西门子公司的S7-200系列PLC实现控制,给出相应的硬件接线和梯形图,并使用SEG译码指令使七段数码管动态显示时间;利用组态软件MCGS制作控制系统动态监控画面,在MCGS和PLC串行通信的基础上,通过计算机控制PLC实现对十字路口交通灯实时控制,具有直观、方便的特点,在PLC教学中收到了较好的效果。
Taking an example of traffic lights at crossroads, the traffic lights running situation under the normally running and emergency transport was introduced in detail , this traffic lights signal system was controlled by Siemens corporation S7-200 PLC series. The wiring of hardware and PLC ladder diagram were discussed. 7- Segment LED showed time by SEG order. The control system of dynamic monitoring screen was made by MCGS configuration software. The system realized the reahime monitoring by using computer-controlled PLC based on series communication by MCGS and PLC. This system had many merits such as easy to comprehend, directviewing and convenience , thus , acquired better effect in PLC teaching.
出处
《重庆工商大学学报（自然科学版）》
2010年第6期609-612,共4页
Journal of Chongqing Technology and Business University:Natural Science Edition
关键词
可编程控制器
交通灯
梯形图
组态软件
Programmable Logic Control
traffic lights
ladder diagram
configuration software
