Date of Publication :7th January 2026

Abstract: This paper presents the design and analysis of an elevator automation system for multi-floor buildings using a Programmable Logic Controller (PLC 500). The study aims to improve efficiency, safety, and reliability through the implementation of an automated control system that manages elevator motion, door operations, and safety interlocks. A PLC-based design was modeled, simulated, and analyzed to demonstrate its accuracy in controlling elevator operations compared to traditional relay systems. The proposed system integrates floor selection modules, sensor-based door management, and emergency safety controls. Simulation results indicate improved timing precision, reduced fault occurrence, and increased operational consistency, making the system suitable for medium-rise commercial buildings.

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