电梯是现代化的产物，作为高层建筑的垂直交通工具，与人们的生活紧密相关，随着 人们生活水平的提高，电梯得到了快速进展，而现在的电梯已不仅仅局限于单一的功用基 础之上，各种各样的电梯应运而生，它不仅仅做到了有用而且还能做到美化城市的效果， 已经成为各类城市一道漂亮的风景线。电梯继电器控制系统故障率高，大大降低了电梯的 可靠性和安全性，常常造成停梯，给乘用人员带来不便和惊忧。且电梯一旦发生冲顶或蹲 底，不但会造成电梯机械部件损坏，还可能出现人身事故。在电梯控制中采纳了 PLC，用 软件实现对电梯运行的自动控制，去掉了选层器及大部分继电器，控制系统结构简单，外 部线路简化°PLC可实现各种复杂的控制系统，方便地增加或改变控制功能，PLC 可进行 故障自动检测与报警显示，提高运行安全性，并便于检修。本设计是关于商用观光电梯控 制系统的设计，其逻辑控制由 PLC 代替原来的继电器控制，通过合理的选择和设计，提高 了电梯的控制水平，并改善了电梯运行的舒适感，使电梯达到了较为理想的控制效果。关键词：PLC；控制；电梯PLC-based automatic design of four floors of the elevatorAbstractTutor: Li Xiu-yingAuthot: Lv Xu-gangThe elevatorwas the modernized product, took the high-risconstructionhe vertical transportation vehicle, with people's life close correlation, along with the people li enhancement, the elevator obtained the fast development, but the present elevator has l merely above the sole functionfoundationvariouselevatonrisesat the historimoment, it achieved not merely practical moreover has also been able to achieve beautifies the city already became each kind of city beautiful scenery line.The elevator black-white contr failure rate is high, reduced the elevator reliability and the security greatly, creates the ladderfor while bringsinconvenienand startledorrow with the personnel.Oncalsothe elevatoioccurs flushesgoes againstor squatsthe bottom, not only can createthe elevator mechanical part damage, but also possibly appears the accident causing personal injury. PLC in...
