IEC 61131 is an
IEC standard for
programmable controllers. It was first published in 1993;
the current
(third) edition dates from 2013.
It was known as IEC 1131 before the change in numbering system by IEC. The parts of the IEC 61131 standard are prepared and maintained by working group 7, programmable control systems, of subcommittee SC 65B of
Technical Committee TC65 of the
IEC.
Sections of IEC 61131
Standard ''IEC 61131'' is divided into several parts:
* Part 1: General information. It is the introductory chapter; it contains definitions of terms that are used in the subsequent parts of the standard and outlines the main functional properties and characteristics of PLCs.
* Part 2: Equipment requirements and tests - establishes the requirements and associated tests for programmable controllers and their peripherals. This standard prescribes: the normal service conditions and requirements (for example, requirements related with climatic conditions, transport and storage, electrical service, etc.); functional requirements (power supply & memory, digital and analog
I/Os); functional type tests and verification (requirements and tests on environmental, vibration, drop, free fall, I/O, power ports, etc.) and
electromagnetic compatibility (EMC) requirements and tests that programmable controllers must implement. This standard can serve as a basis in the evaluation of safety programmable controllers to
IEC 61508
IEC 61508 is an international standard published by the International Electrotechnical Commission consisting of methods on how to apply, design, deploy and maintain automatic protection systems called safety-related systems. It is titled ''Functio ...
.
*
Part 3: Programming languages
*
Part 4: User guidelines
*
Part 5: Communications
*
Part 6: Functional safety
*
Part 7:
Fuzzy control
A fuzzy control system is a control system based on fuzzy logic—a mathematical system that analyzes analog input values in terms of logical variables that take on continuous values between 0 and 1, in contrast to classical or digital logic, ...
programming
*
Part 8: Guidelines for the application and implementation of programming languages
*
Part 9: Single-drop digital communication interface for small sensors and actuators (SDCI, marketed as
IO-Link[http://www.io-link.com/share/Downloads/Spec-Interface/IOL-Interface-Spec_10002_V112_Jul13.pdf ])
*
Part 10: PLC open XML exchange format for the export and import of IEC 61131-3 projects
Related standards
IEC 61499 The international standard IEC 61499, addressing the topic of function blocks for industrial process measurement and control systems, was initially published by the International Electrotechnical Commission (IEC) in 2005. The specification of IEC 61 ...
Function Block
PLCopen
PLCopen is an independent organisation providing efficiency in industrial automation based on the needs of users. PLCopen members have concentrated on technical specifications around IEC 61131-3, creating specifications and implementations in order ...
has developed several standards and working groups.
* TC1 - Standards
* TC2 - Functions
* TC3 - Certification
* TC4 - Communications
* TC5 - Safe Software
* TC6 -
XML
Extensible Markup Language (XML) is a markup language and file format for storing, transmitting, and reconstructing arbitrary data. It defines a set of rules for encoding documents in a format that is both human-readable and machine-readable ...
* Motion Control Library
* Presentation on IEC 61131-3
References
Sources
* R.W. Lewis, ''Modelling control systems using IEC 61499''
* R.W. Lewis, ''Programming industrial control systems using IEC 1131-3''
* K.H. John & M. Tiegelkamp, ''IEC 61131-3: Programming Industrial Automation Systems''
External links
*
* PLCopen.org - International Not-For-Profit organization that supports and extends the IEC 61131 programming standard. http://www.PLCopen.org
* PLCopen North America http://www.PLCopen-NA.org Part of PLCopen
* XML Standard Documentation: https://web.archive.org/web/20080523154515/http://www.plcopen.org/pages/tc6_xml/
{{List of IEC standards
Electronic engineering
#61131
Programmable logic controllers