"You can embed intelligent behavior with roller switches, similar to the switch that activates a fridge light, or an AND and OR gate (logic gates are the fundamental of programming), " explains Bdeir.
In the paper, traffic signal light is controlled by PLC-200 by using programming logic controller of Siemens company.
文章主要是采用西门子公司的可编程逻辑控制器PLC - 200来实现交通信号灯的控制。
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While PLC logic control, data operations, data comparison, data transmission through the process of combining organic and not only control the traffic light changes, as well as the time display.