Abstract

Defines link procedures which are restricted to message transmission sequences operating with size 1 windows. It is one of a series of Standards applicable to telecontrol equipment systems. This Standard is identical with and has been reproduced from IEC 60870-5-2:1992.

RECONFIRMATION NOTICE
Technical Committee EL-050 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 31 May 2015.
Reconfirmed documents cannot be amended, but may be formally revised and a new edition
published.
The following are represented on Technical Committee EL-050:
Australian Industry Group
Chamber of Commerce and Industry Queensland
Energy Networks Association
Victoria University

Scope

This section of IEC 870-5 applies to telecontrol equipment and systems with coded bit serial data transmission for monitoring and controlling geographically widespread processes.

The defined link procedures are restricted to message transmission sequences operating with size 1 windows. This means that the link layer of the primary station (station that initiates a message transfer) accepts a request for a new message transfer only when a previously accepted request for a message transfer is terminated either successfully or with an error indication. The procedures are applicable to balanced and unbalanced transmission in telecontrol systems using half duplex or duplex transmission channels.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Reconfirmed 22/07/2015. This standard as been reconfirmed in Australia in 2015 and remains current in New Zealand. Reconfirmation Notice 22/07/2015
Pages
ISBN
Committee	EL-050
Supersedes	DR 97152 CP