EN 62056-7-6:2013

Electricity metering data exchange - The DLMS/COSEM suite - Part 7-6: The 3-layer, connection-oriented HDLC based communication profile

IEC 62056-7-6:2013 specifies the DLMS/COSEM 3-layer, connection-oriented HDLC based communication profile.

Datenkommunikation der elektrischen Energiemessung - DLMS/COSEM - Teil 7-6: HDLC basiertes 3-Schichten Kommunikations-Protokoll

Echange des données de comptage de l'électricité - La suite DLMS/COSEM - Partie 7-6: Profil de communication à 3 couches, orienté connexion et basé sur HDLC

La CEI 62056-7-6:2013 spécifie le profil de communication DLMS/COSEM à 3 couches, orienté connexion et basé sur HDLC.

Izmenjava podatkov meritev električne energije - Niz DLMS/COSEM - 7-6. del: 3-plastni, povezovalno naravnan komunikacijski profil na osnovi HDLC (IEC 62056-7-6:2013)

Ta del standarda IEC 62056 določa 3-plastni, povezovalno naravnan komunikacijski profil DLMS/COSEM na osnovi HDLC.

General Information

• Status: Published
• Publication Date: 19-Sep-2013
• Withdrawal Date: 19-Jun-2016
• ICS: 17.220 - Electricity. Magnetism. Electrical and magnetic measurements
• ICS: 35.110 - Networking
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: CLC/TC 13 - Equipment for electrical energy measurement and load control
• Drafting Committee: IEC/TC 13 - IEC_TC_13
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 06-Sep-2013
• Completion Date: 06-Sep-2013
• Mandate: M/441 - Standardisation mandate to CEN, CENELEC and ETSI in the field of measuring instruments for the development of an open architecture for utility meters involving communication protocols enabling interoperability
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST EN 62056-7-6:2013 - Electricity metering data exchange - the DLMS/COSEM suite - Part 7-6: The 3-layer, connection-oriented HDLC based communication profile (IEC 62056-7-6:2013)

Relations

• Replaces: EN 62056-53:2007 - Electricity metering - Data exchange for meter reading, tariff and load control - Part 53: COSEM application layer
• Effective Date: 29-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 62056-7-6:2013
01-november-2013
1DGRPHãþD
SIST EN 62056-53:2007
,]PHQMDYDSRGDWNRYPHULWHYHOHNWULþQHHQHUJLMH1L]'/06&26(0GHO
SODVWQLSRYH]RYDOQRQDUDYQDQNRPXQLNDFLMVNLSURILOQDRVQRYL+'/&,(&


Electricity metering data exchange - the DLMS/COSEM suite - Part 7-6: The 3-layer,

connection-oriented HDLC based communication profile (IEC 62056-7-6:2013)
Datenkommunikation der elektrischen Energiemessung - DLMS/COSEM - Teil 7-6:
HDLC basiertes 3-Schichten Kommunikations-Protokoll (IEC 62056-7-6:2013)

Echange de données dans les équipements de mesure de l'énergie électrique - suite

DLMS/COSEM - Partie 7-6: Profil de communication triple couche, orienté connexion et

basé sur HDLC (CEI 62056-7-6:2013)
Ta slovenski standard je istoveten z: EN 62056-7-6:2013
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
35.100.05 9HþVORMQHXSRUDEQLãNH Multilayer applications
UHãLWYH
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
SIST EN 62056-7-6:2013 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 62056-7-6:2013
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SIST EN 62056-7-6:2013
EUROPEAN STANDARD
EN 62056-7-6
NORME EUROPÉENNE
September 2013
EUROPÄISCHE NORM
ICS 17.220; 35.110; 91.140.50 Supersedes EN 62056-53:2007 (partially)
English version
Electricity metering data exchange -
The DLMS/COSEM suite -
Part 7-6: The 3-layer, connection-oriented HDLC based communication
profile
(IEC 62056-7-6:2013)
Echange des données de comptage de Datenkommunikation der elektrischen
l'électricité - Energiemessung -
La suite DLMS/COSEM - DLMS/COSEM -
Partie 7-6: Profil de communication à 3 Teil 7-6: HDLC basiertes 3-Schichten
couches, orienté connexion et basé sur Kommunikations-Protokoll
HDLC (IEC 62056-7-6:2013)
(CEI 62056-7-6:2013)

This European Standard was approved by CENELEC on 2013-06-20. CENELEC members are bound to comply

with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard

the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CENELEC member into its own language and notified

to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,

the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,

Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,

Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62056-7-6:2013 E
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SIST EN 62056-7-6:2013
EN 62056-7-6:2013 - 2 -
Foreword

The text of document 13/1527/FDIS, future edition 1 of IEC 62056-7-6, prepared by IEC/TC 13 "Electrical

energy measurement, tariff- and load control" was submitted to the IEC-CENELEC parallel vote and

approved by CENELEC as EN 62056-7-6:2013.
The following dates are fixed:
• latest date by which the document has
(dop) 2014-03-20
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national
(dow) 2016-06-20
standards conflicting with the
document have to be withdrawn
EN 62056-7-6:2013 supersedes partially EN 62056-53:2007.

It is based on EN 62056-53:2007, Electricity metering – Data exchange for meter reading, tariff and load

control – Part 53: COSEM application layer, Annex B.2 The 3-layer, connection-oriented, HDLC based

communication profile and introduces the following significant technical changes:

NOTE EN 62056-53:2007 contains the specification of the DMS/COSEM communication profiles whereas the new edition,

EN 62056-5-3:2013, which replaces it, does not.

• The title of the standard has been aligned with the title of other parts of the revised EN 62056 series;

• A Figure showing the protocol stack has been added to Clause 5.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent

rights.
Endorsement notice

The text of the International Standard IEC 62056-7-6:2013 was approved by CENELEC as a European

Standard without any modification.
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SIST EN 62056-7-6:2013
- 3 - EN 62056-7-6:2013
Annex ZA
(normative)
Normative references to i nternational publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
IEC 62056-5-3 2013 Electricity metering data exchange - The EN 62056-5-3 2013
DLMS/COSEM suite -
Part 5-3: DLMS/COSEM application layer

IEC 62056-21 2002 Electricity metering - Data exchange for meter EN 62056-21 2002

reading, tariff and load control -
Part 21: Direct local data exchange

IEC 62056-42 2002 Electricity metering - Data exchange for meter EN 62056-42 2002

reading, tariff and load control -
Part 42: Physical layer services and
procedures for connection-oriented
asynchronous data exchange

IEC 62056-46 2002 Electricity metering - Data exchange for meter EN 62056-46 2002

+ A1 2006 reading, tariff and load control - + A1 2007
Part 46: Data link layer using HDLC protocol
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SIST EN 62056-7-6:2013
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SIST EN 62056-7-6:2013
IEC 62056-7-6
Edition 1.0 2013-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electricity metering data exchange – The DLMS/COSEM suite –
Part 7-6: The 3-layer, connection-oriented HDLC based communication profile
Échange des données de comptage de l'électricité – La suite DLMS/COSEM –
Partie 7-6: Profil de communication à 3 couches, orienté connexion et basé sur
HDLC
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX Q
ICS 17.220; 35.110; 91.140.50 ISBN 978-2-83220-806-9

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 62056-7-6:2013
– 2 – 62056-7-6 © IEC:2013
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope ............................................................................................................................... 5

2 Normative references ....................................................................................................... 5

3 Terms, definitions and abbreviations ................................................................................ 5

4 Targeted communication environments ............................................................................. 6

5 Structure of the profile ...................................................................................................... 6

6 Identification and addressing scheme ............................................................................... 7

7 Supporting layer services and service mapping ................................................................ 8

8 Communication profile specific service parameters of the DLMS/COSEM AL

services ............................................................................................................................ 9

9 Specific considerations / constraints ................................................................................. 9

9.1 Confirmed and unconfirmed AAs and data transfer service invocations, frame

types used ............................................................................................................... 9

9.2 Correspondence between AAs and data link layer connections, releasing

AAs ....................................................................................................................... 10

9.3 Service parameters of the COSEM-OPEN / -RELEASE / -ABORT services............ 10

9.4 EventNotification service and protocol ................................................................... 11

9.5 Transporting long messages .................................................................................. 13

9.6 Supporting multi-drop configurations ..................................................................... 13

Bibliography .......................................................................................................................... 15

Index .................................................................................................................................... 16

Figure 1 – The DLMS/COSEM 3-layer, connection oriented, HDLC based

communication profile ............................................................................................................. 7

Figure 2 – Identification/addressing scheme in the 3-layer, CO, HDLC-based

communication profile ............................................................................................................. 8

Figure 3 – Summary of data link layer services ....................................................................... 9

Figure 4 – Example: EventNotificaton triggered by the client ................................................. 12

Figure 5 – Multi-drop configuration and its model .................................................................. 13

Figure 6 – Master/ Slave operation on the multi-drop bus ..................................................... 13

Table 1 – Application associations and data exchange in the 3-layer, CO, HDLC-based

profile ................................................................................................................................... 10

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SIST EN 62056-7-6:2013
62056-7-6 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICITY METERING DATA EXCHANGE –
THE DLMS/COSEM SUITE –
Part 7-6: The 3-layer, connection-oriented
HDLC based communication profile
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed that compliance

with this International Standard may involve the use of a maintenance service concerning the stack of protocols on

which the present standard IEC 62056-7-6 is based.

The IEC takes no position concerning the evidence, validity and scope of this maintenance service.

The provider of the maintenance service has assured the IEC that he is willing to provide services under

reasonable and non-discriminatory terms and conditions for applicants throughout the world. In this respect, the

statement of the provider of the maintenance service is registered with the IEC. Information may be obtained from

DLMS User Association
Zug/Switzerland
www.dlms.ch
___________
Device Language Message Specification.
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SIST EN 62056-7-6:2013
– 4 – 62056-7-6 © IEC:2013

International Standard IEC 62056-7-6 has been prepared by Technical Committee 13,

Electrical energy measurement, tariff- and load control.

It is based on IEC 62056-53:2006, Electricity metering – Data exchange for meter reading,

tariff and load control – Part 53: COSEM application layer, Annex B.2 The 3-layer,

connection-oriented, HDLC based communication profile and introduces the following

significant technical changes:

NOTE IEC 62056-53:2006 contains the specification of the DMS/COSEM communication profiles whereas the

new edition, IEC 62056-5-3:— , which replaces it, does not.

• The title of the standard has been aligned with the title of other parts of the revised

IEC 62056 series;
• A Figure showing the protocol stack has been added to Clause 5.
The text of this standard is based on the following documents:
FDIS Report on voting
13/1527/FDIS 13/1545/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all the parts in the IEC 62056 series, published under the general title Electricity

metering data exchange – The DLMS/COSEM suite, can be found on the IEC website.

Future standards in this series will carry the new general title as cited above. Titles of existing

standards in this series will be updated at the time of the next edition.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
___________
To be published simultaneously with this part of IEC 62056.
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SIST EN 62056-7-6:2013
62056-7-6 © IEC:2013 – 5 –
ELECTRICITY METERING DATA EXCHANGE –
THE DLMS/COSEM SUITE –
Part 7-6: The 3-layer, connection-oriented
HDLC based communication profile
1 Scope

This part of IEC 62056 specifies the DLMS/COSEM 3-layer, connection-oriented HDLC based

communication profile.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.

IEC 62056-21:2002, Electricity metering – Data exchange for meter reading, tariff and load

control – Part 21: Direct local data exchange

IEC 62056-42:2002, Electricity metering – Data exchange for meter reading, tariff and load

control – Part 42: Physical layer services and procedures for connection-oriented

asynchronous data exchange

IEC 62056-46:2002, Electricity metering – Data exchange for meter reading, tariff and load

control – Part 46: Data link layer using HDLC protocol
Amendment 1:2006

IEC 62056-5-3:—, Electricity metering data exchange – The DLMS/COSEM suite – Part 5-3:

DLMS/COSEM application layer
NOTE See also the Bibliography.
3 Terms, definitions and abbreviations
AA Application Association
AARQ A-Associate Request – an APDU of the ACSE
ACSE Association Control Service Element
AL Application Layer
APDU Application Layer Protocol Data Unit
ASO Application Service Object
Client A station, asking for services. In the case of the 3-layer, CO HDLC based
profile it is the master station
.cnf confirm service primitive
CO Connection-oriented
COSEM Companion Specification for Energy Metering
DLMS Device Language Message Specification
DLMS UA DLMS User Association
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SIST EN 62056-7-6:2013
– 6 – 62056-7-6 © IEC:2013
GSM Global System for Mobile Communications
HDLC High-level Data Link Control
HHU Hand Held Unit
I Information frame (a HDLC frame type)
.ind .indication service primitive
LLC Logical Link Control (Sublayer)
MAC Medium Access Control (sublayer)
MAC Message Authentication Code (cryptography)

master Central station – station which takes the initiative and controls the data flow

NRM Normal Response Mode
OSI Open System Interconnection
PDU Protocol Data Unit
P/F Poll/Final
PhL Physical Layer
PSTN Public Switched Telephone Network
.req .request service primitive
.res .response service primitive
RNR Receive Not Ready (a HDLC frame type)
RR Receive Ready (a HDLC frame type)
SAP Service Access Point
SNRM Set Normal Response Mode (a HDLC frame type)

Server A station, delivering services. The tariff device (meter) is normally the server,

delivering the requested values or executing the requested tasks.
Slave Station
...