Abstract
With the social development and technological advances, people's live and production have taken place changes with each passing day, the elevator has become important tool for cities. Especially in the growing material and spiritual needs of today, the elevator has not only a tool of transport in many large cities, it has been derived varieties of products. The modern elevator technology and techniques is also unprecedented, computer, automatic control and power electronics and other emerging technology in the manufacture of the elevator are reflected. Now most of the elevator replace the relay by the PLC logic control, the governor also mostly used to control fast and stable drive.
This design based on technological trends in today's world, the programmable logic controller (PLC) and frequency control drive the integration of the design is completed through the rational control of the elevator system, in reliability, flexibility, and security aspects of the increased. And when the ride comfort is also taken into the design, making the elevator reached the ideal level. The design of the elevator produced by the Office of internal and external calls with the election floor, floor displays and alarms to remind the other functions.
The design describes the basic structure of the elevator and the elevator works, and the PLC program for the analysis and design of the focus of the preparation. Whole is broadly divided into hardware and software design in two parts, and in the end of the paper summarizes the elevator development and prospects.
Key Words:elevator,PLC,frequency control,lad
