Abstract

Adopts IEC 61131-1:2003 which establishes the definitions and identifies the principal characteristics relevant to the selection and application of programmable controllers and their associated peripherals.

RECONFIRMATION NOTICE
Technical Committee IT-006 has reviewed the content of this publication and in
accordance with Standards Australia procedures for reconfirmation, it has been
determined that the publication is still valid and does not require change.
Reconfirmed documents cannot be amended, but may be formally revised and a new
edition published.
Certain documents referenced in the publication may have been amended since the
original date of publication. Users are advised to ensure that they are using the latest
versions of such documents as appropriate, unless advised otherwise in this
Reconfirmation Notice.
Approved for reconfirmation in accordance with Standards Australia procedures for
reconfirmation on 14 July 2015.
The following are represented on Technical Committee IT-006:
Australia Safety Critical Systems Association
Australian Computer Society
Australian Industry Group
Australian Petroleum Production and Exploration Association
Consult Australia
Engineers Australia
Institute of Chemical Engineers Australia
Institute of Instrumentation, Control & Automation
ISACA
Process Control Society
The University of Queensland
Workplace Health and Safety Queensland

Scope

This Part of IEC 61131 applies to programmable controllers (PLC) and their associated peri-pherals such as programming and debugging tools (PADTs), human-machine interfaces (HMIs), etc., which have as their intended use the control and command of machines and industrial processes.
PLCs and their associated peripherals are intended to be used in an industrial environment
and may be provided as open or enclosed equipment. If a PLC or its associated peripherals
are intended for use in other environments, then the specific requirements, standards and
installation practices for those other environments must be additionally applied to the PLC and its associated peripherals.
The functionality of a programmable controller can be performed as well on a specific
hardware and software platform as on a general-purpose computer or a personal computer
with industrial environment features. This standard applies to any products performing the
function of PLCs and/or their associated peripherals. This standard does not deal with the
functional safety or other aspects of the overall automated system. PLCs, their application
programme and their associated peripherals are considered as components of a control system.
Since PLCs are component devices, safety considerations for the overall automated system
including installation and application are beyond the scope of this Part. However, PLC safety
as related to electric shock and fire hazards, electrical interference immunity and error
detecting of the PLC-system operation (such as the use of parity checking, self-testing
diagnostics, etc.), are addressed. Refer to IEC 60364 or applicable national/local regulations
for electrical installation and guidelines.
This Part of IEC 61131 gives the definitions of terms used in this standard. It identifies the
principal functional characteristics of programmable controller systems.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Reconfirmed 22/10/2015. Reconfirmation Notice 22/10/2015
Pages
ISBN
Committee	IT-006
Supersedes	AS 4168.1-1994 DR 03587 CP