基于plc的交通灯控制系统设计外文翻译-交通线路(编辑修改稿)

基于plc的交通灯控制系统设计外文翻译-交通线路(编辑修改稿)内容摘要：

nded. Circuit is shown in Figure 2. B. Control Program Design Six timers and two special normal open pulse is used in this system, the green light flashes for all northsouth and easttimer and a special pulse。 eight kinds of 滨州学院本科毕业设计 (外文翻译 ) 4 interlocking internal relay is used to implement the urgency and transmit pulse two directions to PLC, shown in the figure. Two SDEC instructions are used to display the countdown display the corresponding light. As an important part of the countdown display program, east and west of the green light reflected in the view 4 in these programs downloaded to the programmable logic controller (PLC), all the traffic lights running accuracy, urgency, and things can be interlocked from north to south strictly, all the lights can be set back to the urgency of passing state. Therefore, these control program is correct, simple. C. Monitoring System Computer system has two main functions: an output signal acquisition and display realtime status of the programmable logic controller (PLC) to control traffic lights, traffic lights. Another notification robot status and history of the state realtime curve by examining the history and alarm window. This monitoring system design and configuration software MCGS configuration is easy. The serial munication is implemented as follows. 滨州学院本科毕业设计 (外文翻译 ) 5 Data inspection methods: double ended Serial Communications Number: COM0 ended The minimum sampling period: 200 ms Programmable Logic Controller (PLC) The parameters are defined as follows: The minimum sampling period of the basic properties: 200 ms Three read / write channel: X0, X1, X2 Six readonly access (read . traffic lights): Q0Q5 All channels must be connected to a variable defined in a realtime database access visits and other parameters to their default values. After a successful relationship, PLC and puter control system is able to change the color of the analog。