Refer to the following pages for an overview of the IEC61131-3 programming languages:
Program organization units
Data types
Structures
Variables
Arrays
Constant expressions
Conditional compiling
Handling exceptions
Variable status bits
SFC: Sequential Function Chart
FBD: Function Block Diagram
LD: Ladder Diagram
ST: Structured Text
IL: Instruction List
Use of ST instructions in graphic
languages
The following topics detail the set of programming features and standard blocks:
Basic operations
Boolean operations
Arithmetic operations
Comparisons
Type conversion functions
Selectors
Registers
Counters
Timers
Maths
Trigonometrics
String operations
Advanced
Note: Some other functions not documented here are reserved for diagnostics and special operations. Please contact your technical support for further information.