Overview
Structured Text (ST) is a high level textual programming language that is a Pascal like language. It is developed and published by IEC in the IEC 61131-3 international standard, which standardizes programming languages for programmable controllers (PLC). ST is very flexible and intuitive for writing control algorithms. The language, which is as efficient as ladder logic, uses typical operators such as logical branching, multiple branching, and loops. Programs can be created in any text editor and they resemble sentences, making it easy to program, debug, test, and understand. Due to its highly-structured nature, ST is ideal for tasks requiring complex math, algorithms, or decision-making.
In recent years, an increasing number of industrial users are requesting the use of ST over other programming languages for their industrial process needs. The reason is simple: most manufacturing companies prefer vendor independent platform in their plants. When circumstances arise, a control system can be switched from one vendor to another with minimal effort. It is because most common PLC manufacturers have already adopted ST. ST can also be written to run on hardware and software PLC platforms, making it one of the most universal text based languages.
This course will provide you with the basic knowledge and advance syntax and functionality of the programming language. Examples will be used throughout the course to help you understand and master ST programming. Whether you are already comfortable with high level programming language or a beginner in logic development, you must prepare yourself with this popular trend in industrial process control.
To receive credit for this course, the student must pass a multiple-choice quiz consisting of fifteen (15) questions.
Specific Knowledge or Skill Obtained
This course teaches the following specific knowledge and skills:
- History and Background of Structured Text
- Basic Language Structure and Syntax
- Program Flow and Structure
- Local and Global Variable Declaration
- Conditional Statement
- Programming Loop
- Writing Subroutine / Parameters Passing
- I/O Control
- Best Practice for the Language
Course
Click on the following link to the PDF document to review the course material before taking the quiz for credit.
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