基于PLC的电梯控制系统

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The operating principle of the elevator controlling system based on a PLC is introduced in the paper.The principal aim of this paper is to introduce the designing plan and composition of the 3-floor elevator＇s PLC controlling system.Also expounds the design process of hardware and soflware about PLC controls elevator, giving us specific ladder diagrams .The system composition block diagram and program flow of charts are presented.After analyzing and processing the logical relationship of stochastic signal, the way of PLC program is put forward.阐述了机械制造及其自动化在电梯控制中的应用，介绍了3层电梯的PLC控制系统总体设计方案、设计过程、组成，列出了主要硬件电路、电梯的控制梯形图，并给出了系统组成框图和程序流程图，在分析、处理随机信号逻辑关系的基础上，提出了PLC的编程方法。