Design Of An Elevator PLC Control System

The elevator is a kind tool that is indispensability in the high-building perpendicular transportation. The traditional elevator adopt a relay-logical to control its circulation which the elevator become accident-proneness, short life-span, inconvenience in maintaining and this control circuit also takes up big space, etc. See from the eyes of technique development, this kind of system will be gradually eliminated.This text applies programmable logic controller to carry on the logic control in a five layer elevator, which raises the elevator's reliability, maintainability and flexibility consumedly, prolongs the service life, and shortens the development period of the elevator at the same time. Competing to the traditional elevator, this kind of elevator can complete the more complicated mission more easily, and it can carry out many functions that traditional elevator control system can not.This elevator control system composes of a drive-movement control state and a non-drive-move control state, namely an auto function state and a manual function state. It still has some function, like indicating layer, invoking by hall, choosing layer and choosing direction etc. In addition, this system have a characteristics of congregate choose control.