15-10-2010, 01:31 PM
Prepared by:
SHAMEER N
Under the guidance of
Dr. S ASHOK
Introduction
In the fast developing world, height of the buildings increased tremendously and the lift has become more of a necessary rather than luxury. When the number of floor increased the control mechanism required for the lift will become more complex. Programmable Logic Controllers are widely accepted industrial control device. With the growth in technology PLCs are now capable of advanced data manipulations, communications benefits of using PLC in industries are the PLC is a hardened industrial computer designed to withstand the harsh factory environment,. reusable they contain a changeable program that eliminators extensive and component changes, offer easy troubleshooting and easy installation and small size. In this system stepper motor is used as driving mechanism. It converts electrical pulses into discrete mechanical movements. The shaft or spindle of a stepper motor rotates in discrete step increments when electrical command pulses are applied to it in the proper sequence.
In this project, the system is designed to control the movement of lift between three floors and an HMI unit is set up to add more features for controlling the existing lift unit.
http://industrialpowerdownload/lift_plc.pdf
