基于S7-1200 PLC的交通灯控制设计方法研究

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Abstract This paper first describes the advantages and disadvantages of two common design methods: sequential control method and look-up table method by timer based on S7-1200 PLC in traffic light control design, and then proposes a design method of control through comparison after counting the pulses generated by the tissue blocks of internal circulation interruption in the system, and analyzes the advantages and disadvantages of these three methods.

Key words： S7-1200 PLC traffic-light control sequential control method look-up table method by timer look-up table method by counter cyclic interrupt

Received: 05 August 2018 Published: 18 February 2019

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	Chen Fangfang

Cite this article:

Chen Fangfang. The design-method research of traffic-light control based on S7-1200 PLC[J]. Electrical Engineering, 2019, 20(2): 89-91.

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http://dqjs.cesmedia.cn/EN/Y2019/V20/I2/89