Abstract
Elevator is in close connection with the machinery of large-scale electrical machinery and electronic products. Mainly by the room, Wells Road, Car, door systems and electrical control system. Accompanied by the development of the construction industry, to provide for the construction of the elevator up and down traffic and transport industries are developing rapidly. Elevator is not only an important link in the production of equipment, but also a life of work and the necessary equipment, can be expected that, with the development of society, elevator products in people's material and cultural life and the car will be has become one of the important transportation equipment. The design mainly PLC (PLC) and computer application to the elevator control system, and to five-story elevator as an example to complete a single lift PLC program control system design, composition and modular program design . Mitsubishi FX2N through computer communications and to achieve operation of the elevator control system. Selection of Mitsubishi FX2N PLC, the use of 220V AC power for the pressure. PLC in the I / O interface distribution, code-named after the combination with and to determine a variety of soft-in relays, data areas, access code, commonly used commands, such as the preparation of rules and code. Choose the exchange of two-speed motor to achieve the lift and drag, the use of floor sensors to achieve inter-floor flip; display driver circuit using light emitting diode LED display screen body composition. Focus on the safety of PLC control circuitry, level control circuit, the design of gate switch and door switch to start the procedure, uplink downlink procedures, floor control procedures, automatic procedures for the preparation of orientation. PLC elevator control system only needs a little improvement can be applied to more high-performance requirements of the elevator. All this indicates that the series PLC is not only high reliability to meet the elevator on the actual needs, but also in the control and performance can replace similar imported products, and application of breakthroughs in the field of elevator to a wider range of industries, the future will be more for the broad.
