IEC 61131

IEC 61131 is an IEC standard for programmable controllers. 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 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:^[1]

• 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
• Part 3: Programming languages
• Part 4: User guidelines
• Part 5: Communications
• Part 6: Functional safety
• Part 7: Fuzzy control 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^[2][3][4])

A further part is currently being worked on:

• Part 10: XML exchange formats for programs according to IEC 61131-3

Related Standards

IEC 61499 Function Block

PLCopen has developed several standards and working groups.

• TC1 - Standards
• TC2 - Functions
• TC3 - Certification
• TC4 - Communications
• TC5 - Safe Software
• TC6 - XML
• 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

• "IEC 61131" at International Electrotechnical Commission
• 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: http://www.plcopen.org/pages/tc6_xml/