PLC Programming For Beginners

Master the logic that controls the modern world. This is your hands-on, hardware-free guide to Programmable Logic Controllers.

Based on the bestselling Udemy course with over 10,000 students, this clear and complete textbook demystifies Programmable Logic Controllers (PLCs) and empowers you to write professional, structured control code from the ground up. Authored by a professional automation engineer and expert instructor, this book transforms a proven, hands-on video curriculum into a step-by-step learning journey.

Using the powerful and free CoDeSys V3 development environment, you'll move beyond dry theory and start building real-world logic immediately. With the integrated PLC simulator, you can complete every hands-on exercise in this book without needing to purchase any physical hardware. This structured course will guide you through the IEC 61131-3 standard, all four core programming languages, and advanced patterns like State Machines and modular design, transforming you into a competent and effective automation programmer. Inside, you will learn to:

• Understand PLC Fundamentals: Grasp the core concepts of PLC hardware, the scan cycle, real-time operating systems, and digital/analog I/O.
• Master the IEC 61131-3 Standard: Learn the foundational software models, data types, and structures that govern all modern PLC programming.
• Program in All Four Core Languages: Gain practical, hands-on skills in Ladder Diagram (LD), Function Block Diagram (FBD), Sequential Function Chart (SFC), and the powerful Structured Text (ST).
• Implement Robust State Machines: Move beyond simple flags to design and build sophisticated sequential programs using the professional patterns that drive modern machinery.
• Write Reusable, Modular Code: Learn to create your own Functions (FCs) and Function Blocks (FBs) to write efficient, clean, and scalable applications-the hallmark of an expert programmer.
• Work Through Practical Exercises: Apply your knowledge with guided exercises, complete with downloadable CoDeSys projects, simulations, and visualizations.