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Automation Studio Workshop: IEC 61131-3 Text-based Programming with ST [SEM246.1]

IEC 61131-3 programming languages represent a standardized approach to controller programming. Simple yet powerful language constructs make it easy to program a wide range of control systems.

Objectives and content

  • Overview of the programming languages specified in the IEC 61131-3 standard1
  • Differences between text-based and visual programming languages
  • Working with Structured Text (ST)
  • Basic constructs
  • Decisions
  • Loops
  • Working with arrays
  • Step switching mechanisms
  • Calling function blocks
  • Calling actions
  • Creating basic programs on your own
  • Option of working with another programming language

Your tasks include:

  • You use text-based high-level language.
  • You implement programs in accordance with IEC 61131-3.
  • You program sequences for machine controllers.
  • You extend existing programs.
1 The IEC 61131-3 standard is the only worldwide applicable standard for programming languages used on programmable logic controllers. In addition to Sequential Function Chart, other programming languages such as Ladder Diagram, Instruction List, Structured Text and Function Block Diagram are defined.
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