Several legitimate avenues exist for accessing this textbook:
The book is divided into 12 chapters, covering the following topics: | Feature | Webb Textbook (Original) | Modern
Despite being published over two decades ago, "Programmable Logic Controllers: Principles and Applications" remains for PLC education. Its strength lies in its manufacturer-agnostic approach, clear exposition of fundamental concepts, and extensive practical examples that remain applicable to modern PLC systems. While specific programming software and advanced networking protocols have evolved, the core principles of ladder logic, timers, counters, PID control, and sequential programming have remained remarkably stable. The answer lies in its focus on
| 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 | more visually dynamic textbooks available
: Expert reviews from Wiley Online Library note that Webb occasionally uses "PC" to refer to a Programmable Controller, which can be confused with a Personal Computer.
A significant portion of the text is dedicated to the physical components of a PLC system:
Even with newer, more visually dynamic textbooks available, the Webb & Reis book remains highly regarded. What makes it so enduring? The answer lies in its focus on .