Abstract: This paper explains control of three floor elevator using PLC.With the rising life standards and attention to human and with tremendous development in architectural engineering for multi storage building, the installation of elevators becomes an integral part of the infrastructure for the vertical movement. So, the control system is essential for smooth and safe operation of the elevator. Hence for more efficient performance and maintenance, more importance is given to the design of an elevator control system. In this case one can make the better use of PLC for controlling of elevator which is beneficial due to its flexibility, operational speed, reliability, ease of programming, security, and it is easy in implementing changes and correcting errors. Since output results must be produced in response to input condition within a given period of time, it is an example of a real time system. Ladder diagram programming is selected as it is easy to program the PLC.

Keywords: Elevator, sensors, PLC, floors, motor, switches.