The Howdy Glossary

Structured text is a high-level programming language meant for programmable logic controllers (PLCs) in industrial control systems. Resembling Pascal in syntax, it incorporates specific keywords that align with PLC programming standards. Engineers can utilize both textual and graphical representations within an integrated development environment (IDE), making transitions between different programming methods, like ladder logic, more seamless depending on project requirements. This dual representation capability allows for greater flexibility and ease during the configuration and programming of sequential control and event-driven processes.

The language was developed through contributions from various professionals within the automation industry rather than any single entity. Structured text has evolved by integrating feedback from engineers and standardization bodies to meet the demands of PLC applications effectively. By offering features inspired by languages like Pascal but tailored for industrial automation needs, structured text provides a standardized yet flexible approach to configuring and controlling machinery processes.

In competition with other PLC programming languages like ladder logic, function block diagram (FBD), and instruction list (IL), structured text offers several unique advantages. Its Pascal-like syntax enhances readability while incorporating industry-specific keywords ensures suitability for complex automation tasks. The ability to work seamlessly between textual code and graphical representations in an IDE streamlines the development process, making it easier to adapt based on project complexity or engineer preference. This adaptability positions structured text as a versatile tool that balances functionality with ease of use, empowering engineers across various industries to enhance productivity in their control system designs.