This book gives an introduction to the programming language Structured Text (ST) which is used in Programmable Logic Controllers (PLC).

The book can be used for all types of PLC brands including Siemens Structured Control Language (SCL) and Programmable Automation Controllers (PAC).

This 4th edition has been updated, revised, and improved, incorporating feedback and suggestions from readers and students. Bugs have been fixed, additional illustrations added, and new program examples included.

CONTENTS:
- Background, benefits and challenges of ST programming
- Syntax, data types, best practices and basic ST programming
- IF-THEN-ELSE, CASE, FOR, CTU, TON, STRUCT, ENUM, ARRAY, STRING
- Guide for best practice naming, troubleshooting, test and program structure
- Sequencer and code split-up into functions and function blocks
- FIFO, RND, sorting, scaling, toggle, simulation signals and digital filter
- Tank controls, conveyor belts, adaptive pump algorithm and robot control
- PLC program structure for pumping station, 3D car park, and car wash
- Examples: From Ladder Diagram to ST programming

The book contains more than 150 PLC code examples with a focus on learning how to write robust, readable, and structured code.

The book systematically covers basic programming, offering advice and practical examples based on the author's extensive industrial experience and feedback from readers.

The book is used in educational programs such as the Academy Profession (AP) Graduate in Automation Engineering, as well as other courses that include PLC programming, such as Engineering Automation.

The Author
- Has 30 years of experience in specifying, programming, and delivering complex control solutions and monitoring systems.
- Holds a Bachelor of Science in Electrical Engineering (B.Sc.E.E.) and is a certified lecturer (Associate Professor).
- Has been teaching PLC control in higher education at Business Academy Dania in Randers, Denmark, since 2016.
- Has published several books and sold more than 12,000 copies.