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IEC 61131-3:2025

Programmable controllers – Part 3: Programming languages

Edition date: 2025-05-22
In Force
Available languages: English, French
Summary: IEC 61131-3:2025 specifies the syntax and semantics of programming languages for programmable controllers as defined in IEC 61131-1.
This document specifies the syntax and semantics of a unified suite of programming languages for programmable controllers (PCs). This suite consists of the textual language structured text (ST), and the graphical languages, ladder diagram (LD) and function block diagram (FBD).
An additional set of graphical and equivalent textual elements named sequential function chart (SFC) is defined for structuring the internal organization of programs and function blocks. Also, configuration elements are defined which support the installation of programmable controller programs into programmable controller systems.
In addition, features are defined which facilitate communication among programmable controllers and other components of automated systems.
This edition includes the following significant technical changes with respect to the previous edition:
a) inclusion of UTF-8 strings and their associated functions;
b) Annex B contains a comprehensive list of features that have been added, removed or deprecated in comparison to IEC 61131-3:2013.

IEC 61131-3: 2025 spécifie la syntaxe et la sémantique des langages de programmation utilisés pour les automates programmables tels que définis dans l’IEC 61131-1.
Le présent document spécifie la syntaxe et la sémantique d’une suite unifiée de langages de programmation utilisés pour les automates programmables (AP). Cette suite est constituée du langage textuel ST (Structured Text) et des langages graphiques LD (Ladder Diagram) et FBD (Function Block Diagram).
Un autre ensemble d’éléments graphiques et textuels équivalents appelé SFC (Sequential Function Chart) est défini pour structurer l’organisation interne des programmes et des blocs fonctionnels. Des éléments de configuration qui prennent en charge l’installation des programmes pour automate programmable dans des systèmes d’automate programmable, sont également définis.
De plus, des caractéristiques sont définies pour faciliter la communication entre les automates programmables et les autres composants des systèmes automatisés.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
a) inclusion des chaînes UTF-8 et de leurs fonctions associées;
b) l’Annexe B contient une liste complète des fonctionnalités qui ont été ajoutées, supprimées ou déconseillées par rapport à l’IEC 61131-3:2013.
ICS: 35.240.50-IT applications in industry, 25.040.40-Industrial process measurement and control
CTN: TC 65/SC 65B - 1375

Standards Cancellations

Anula a IEC 61131-3:2013

Otras Relaciones

Acuerdo de Frankfurt FprEN IEC 61131-3:2025

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