We present the development of a programmable logic controller (PLC) system designed for three-phase motor applications, incorporating a web-based monitoring system using the ESP32 microcontroller and Modbus transmission control protocol/internet protocol (TCP/IP). It supports six different motor starting methods: direct on line (DOL), on delay, off delay, sequential, alternating, and star-delta. Communication between PLC and ESP32 utilizes Modbus TCP/IP for reliable data exchange, and the web interface displays operational modes, PLC output status, and live data logging with export functionality. Additionally, the system also includes an embedded AI module for wiring fault detection, which improves safety and allows for offline documentation through local SD card storage. The results confirm that ESP32 has been successfully implemented as a central platform that functions simultaneously as a Modbus TCP/IP client, web server, data logger, and AI processor. It communicates with PLC in under 200 ms, while its data logging capabilities provide accurate and reliable information for analysis. The developed system thus provides an effective platform for industrial automation, modern IoT-based monitoring, and intelligent fault detection capabilities.