In the world of industrial automation, few textbooks have achieved the legendary status of Programmable Logic Controllers: Principles and Applications by John W. Webb and Ronald A. Reis. For decades, this book has served as the cornerstone for technicians, engineers, and students transitioning from relay-based control systems to the digital era of PLCs.
Design for predictable startup
" Programmable Logic Controllers: Principles and Applications " by John W. Webb and Ronald A. Reis is a seminal text detailing the fundamentals of industrial automation, including ruggedized design, I/O capabilities, and ladder logic programming. The text serves as a key resource for understanding how PLCs operate through a continuous scan cycle to manage industrial processes. For an introduction to PLC fundamentals, visit Unitronics . Share public link In the world of industrial automation, few textbooks
– The book includes abundant programming examples and end‑of‑chapter problems that can be solved on any available PLC. This hands‑on orientation bridges theory and real‑world practice.
Webb discusses the various hardware components of a PLC system, including: For decades, this book has served as the
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of the 4th edition include expanded coverage of jump functions, stacking functions, newer methods of PID programming, human-machine interfacing (HMI), and the most recent developments in control languages for PLCs. Reis is a seminal text detailing the fundamentals
| Feature | Webb Textbook (Original) | Modern PLC Reality | | :--- | :--- | :--- | | | Ladder Logic primary | Ladder, ST, FBD, SFC | | Communication | RS-232 / DH-485 | Ethernet/IP, OPC UA, MQTT | | I/O Configuration | Rack-based | Distributed (remote I/O over network) | | Cyber Security | Not covered | Firewalls, CIP Security, Authentication |