Attention

IronPLC supports IEC 61131-3 Structured Text excluding I/O mapping.

Explanation

These pages explain the concepts behind IEC 61131-3 and IronPLC. Read them to build a mental model before diving into the tutorials, or come back to them later when you want to understand why things work the way they do.

• What is IEC 61131-3?
• IronPLC and the IEC 61131-3 Ecosystem
• Structured Text Basics
• Program Organization
• Execution Cycle
• Variables and I/O
• References and Indirection
• Type Conversions
• Enabling Dialects and Features