目录内容摘要···················································································（2）第一章 电梯概述········································································（3)1。1电梯的组成······································································（3）1。2电梯的工作原理································································(4）第二章 电梯控制系统的控制分析··················································(5)2 。 1 电 梯 继 电 器 控 制 系 统 的 特 点 及 存 在 问题································(5)2。2 PLC及在电梯控制中的应用特点··········································(5)第三章 可编程控制器的机型选择··················································(7)3。1 PLC的I／O点数估算························································（7）3。2 响应时间·········································································（7）3.3 输入输出模块的选择·························································（7）3。4 机型的确定·····································································（7）第四章 硬件设计·······································································（9）4。1四层电梯主电路设计···········...
