Common abbreviations and technical terms - References - SIMATIC AX - Support documentation - ST Style Guide, Cheat sheet

Structured Text Style guide

Portfolio
SIMATIC AX
Product
SIMATIC AX
Software version
2510
Edition
02/2026
Language
English (original)
Package Name
@ax/st-styleguide

In this style guide, there will be used some abbreviations and technical terms.

The following abbreviations are used within the text:

Abbr. Type
FB Function block
FC Function
TO Technology object
SFB System function block
SFC System function
POU  Program organization unit
ST Structured text

The following technical terms are used within the text:

Term Explanation
Identifier The name of an object used to structure your program or store data, e.g. function names, elementary data types, structured data types, classes, methods, etc.