About the Book Programmable Logic Control (PLC) is one of the most important foundations of modern industrial automation. This book starts with the electrical and control concepts needed by beginners, then moves into PLC architecture, scan cycles, digital and analog I/O, ladder logic, timers, counters, data handling, communication, HMI integration, motion concepts, troubleshooting, commissioning, and advanced design practices. The emphasis is practical: understand the reason behind each instruction, predict how the controller will behave, and build programs that are readable, diagnosable, safe, and maintainable.