PLC控制电梯毕业论文

Abstract

Elevator is widely applied in the national economy and life. The elevator has

become one of the important transport equipment. Traditional domestic elevator control is composed of a relay, contactor. It is not only the existence of poor reliability, high cost, high failure rate and shortcomings, but also in layers increases, changes to the wiring and installation of manufacturing has brought a lot of inconvenience. To achieve control of the elevator

electricalsystem

with

PLC. Greatly

improve

the superiority

of

system control, reduce cost, reduce the fault rate of electric control system.

The subject of design tasks using the programmable controller (PLC) for electrical control freight elevator, the subject of design thinking is the logic control principle, according to the transport rule control requirements and its own elevator, in response to random external call signal. Through the designanalysis, selection of Mitsubishi FX2N type PLC electric control system offreight elevators throughout the design process, and mainly discusses three aspects: the requirements of the control system, configuration, system software design. The core control part of the use of the software program control, in order to ensure the normal operation of the elevator, the requirements

of

the

situation, greatly

improve

the elevator

fault inspection

andrepair convenience and easy, but also overcomes some brought by manual operation of human disturbance factors, the expected results had a good effect .

Key words：elevator PLC control system

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