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IEC 61131-3-ed.4.0
Programmable controllers – Part 3: Programming languages
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STANDARD published on 22.5.2025
The information about the standard:
Designation standards: IEC 61131-3-ed.4.0
Publication date standards: 22.5.2025
SKU: NS-1222416
The number of pages: 518
Approximate weight : 1585 g (3.49 lbs)
Country: International technical standard
Category: Technical standards IEC
The category - similar standards:
Industrial process measurement and controlIT applications in industry
Annotation of standard text IEC 61131-3-ed.4.0 :
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 specifie la syntaxe et la semantique des langages de programmation utilises pour les automates programmables tels que definis dans l’IEC 61131-1. Le present document specifie la syntaxe et la semantique d’une suite unifiee de langages de programmation utilises pour les automates programmables (AP). Cette suite est constituee du langage textuel ST (Structured Text) et des langages graphiques LD (Ladder Diagram) et FBD (Function Block Diagram). Un autre ensemble d’elements graphiques et textuels equivalents appele SFC (Sequential Function Chart) est defini pour structurer l’organisation interne des programmes et des blocs fonctionnels. Des elements de configuration qui prennent en charge l’installation des programmes pour automate programmable dans des systemes d’automate programmable, sont egalement definis. De plus, des caracteristiques sont definies pour faciliter la communication entre les automates programmables et les autres composants des systemes automatises. Cette edition inclut les modifications techniques majeures suivantes par rapport a l’edition precedente: a) inclusion des chaines UTF-8 et de leurs fonctions associees; b) l’Annexe B contient une liste complete des fonctionnalites qui ont ete ajoutees, supprimees ou deconseillees par rapport a l’IEC 61131-3:2013.
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