Introduction

The IL editor is used for instruction list programming according to IEC 61131-3.

Representation

Representation of an IL section:

Objects

An instruction list is composed of a series of instructions.

Each instruction begins on a new line and consists of:

• An operator

• A modifier if required

• One or more operands if required

• A label as a jump target if required

• A comment about the logic if required.

Input Aids

The IL editor offers the following input aids:

• Syntax and semantics are checked as the program is being written.

  • Keywords and comments are displayed in color

  • Unknown words (e.g. undeclared variables) or unsuitable data types are marked with a red wavy line

  • Brief description of errors in the Quickinfo (Tooltip)

• Tabular display of the functions and function blocks

• Input assistance for functions and function blocks

• Operands can be entered and displayed as symbols or topological addresses

• Display of inspection windows