基于plc的电梯控制系统详解.docxVIP

河南师范大学本科毕业论文 河南师范大学 本科毕业论文 学号： 1202324045 基于PLC的电梯控制系统 学院名称： 物理与电子工程学院 专业名称： 电气工程及其自动化 年级班别： 2012级 姓 名： 王文静 指导教师： 伍博 2016年5月  PAGE \* MERGEFORMAT III 基于PLC的电梯控制系统 摘要 本文首先介绍了电梯的基本内容，包括电梯的定义、基本结构和速度分析，根据这些给出了部分硬件的选择、分析与设计，这些硬件主要有变频器，PLC的I/O分配，用于轿厢位置检测的干簧管感应器以及旋转编码器，提出了电梯的控制性能要求，然后绘制出了电梯系统的部分电气控制图，楼层显示程序流程图和主程序流程图，最后给出了电梯运行基本功能的梯形图，这些环节包括楼层显示、自动选向、外呼信号和内选信号的产生消除及显示、开关门控制、电梯平层控制、起动换速控制等。本文基于PLC技术设计出的电梯控制系统，能够有较强的稳定性，较好的舒适性，较方便的操作等特点，另外PLC对提高系统长时间持续运行安全性，相应动作的及时性等方面也发挥了重要作用。 关键词 电梯；PLC；控制系统；梯形图 The Four Layers of Elevator Control System Based on PLC Abstract Firstly, this paper introduces the basic content of the elevator，including elevator definition, the basic structure and velocity analysis,it also supply some selections of hardware.These parts are mainly the transducer, I / O assignment of PLC, dry reed tube sensors for detecting the position of the car and a rotary encoder. This paper presents the performance requirements of the elevator control,and then draw the electrical partial view of the elevator control system,floor display program flow and main program flow chart.In the end,the programs of ladder,about basic running functions of the elevator,are written.These links include open floor display, automatic selection of orientation,the generation,elimination and display of the external call signals and the internal selection signals,door switch control, elevator leveling control, starting for speed control.The elevator control system is designed by application of PLC technology , it has strong stability, better comfort, easy to operate, in addition to ,the PLC is also playing an important role to improve operational safety aspects of the system for a long period, timeliness of corresponding actions. Keywords elevator；PLC；control system；ladder 目录 TOC \o 1-3 \h \u  HYPERLINK \l _Toc32681 摘要  PAGEREF _Toc32681 I Abstract  HYPERLINK \l _Toc30644   PAGEREF _Toc30644 I HYPERLINK \l _T