IEC 62056-5-3:2016

Electricity metering data exchange - The DLMS/COSEM suite - Part 5-3: DLMS/COSEM application layer

IEC 62056-5-3:2016 specifies the DLMS/COSEM application layer in terms of structure, services and protocols for COSEM clients and servers, and defines how to use the DLMS/COSEM application layer in various communication profiles. It defines services for establishing and releasing application associations, and data communication services for accessing the methods and attributes of COSEM interface objects, defined in IEC 62056-6-2:2016, using either logical name (LN) or short name (SN) referencing. This second edition cancels and replaces the first edition of IEC 62056-5-3 published in 2013.

Echange des données de comptage de l'électricité - La suite DLMS/COSEM - Partie 5-3: Couche application DLMS/COSEM

L'IEC 62056-5-3:2016 indique la couche application DLMS/COSEM en termes de structure, de services et de protocoles pour les clients et serveurs COSEM, et définit comment utiliser la couche application DLMS/COSEM dans différents profils de communication. Elle définit les services permettant d'établir et de libérer des associations d'applications, ainsi que les services de communication de données permettant d'accéder aux méthodes et aux attributs des objets d'interface COSEM, définis dans l'IEC 62056-6-2, à l'aide du référencement par nom logique (LN) ou par nom abrégé (SN). Cette deuxième édition annule et remplace la première édition de l'IEC 62056-5-3 parue en 2013.

General Information

• Status: Published
• Publication Date: 03-Mar-2016
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 35.110 - Networking
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: TC 13 - Electrical energy measurement and control
• Drafting Committee: WG 14 - TC 13/WG 14
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 10-Aug-2017

Relations

• Revised: IEC 62056-5-3:2017 - Electrcity metering data exchange - The DLMS/COSEM suite - Part 5-3: DLMS/COSEM application layer
• Effective Date: 05-Sep-2023
• Revises: IEC 62056-5-3:2013 - Electricity metering data exchange - The DLMS/COSEM suite - Part 5-3: DLMS/COSEM application layer
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 62056-5-3 ®
Edition 2.0 2016-03
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electricity metering data exchange – The DLMS/COSEM suite –
Part 5-3: DLMS/COSEM application layer

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from

either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or

your local IEC member National Committee for further information.

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3, rue de Varembé Fax: [phone]

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Switzerland www.iec.ch
About the IEC
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International Standards for all electrical, electronic and related technologies.

About IEC publications
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latest edition, a corrigenda or an amendment might have been published.

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IEC 62056-5-3 ®
Edition 2.0 2016-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electricity metering data exchange – The DLMS/COSEM suite –

Part 5-3: DLMS/COSEM application layer

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220; 35.110; 91.140.50 ISBN 978-2-8322-3218-7

– 2 – IEC 62056-5-3:2016 RLV  IEC 2016
CONTENTS
FOREWORD. 8
INTRODUCTION . 2
1 Scope . 11
2 Normative references . 11
3 Terms, definitions and abbreviations . 13
3.1 Terms and definitions . 13
3.2 Abbreviations . 13
4 Overview . 15
4.1 DLMS/COSEM application layer structure . 15
4.2 DLMS/COSEM application layer services . 17
4.2.1 ASO services . 17
4.2.2 Services provided for application association establishment and release . 17
4.2.3 Services provided for data transfer . 18
4.2.4 Layer management services . 23
4.2.5 Summary of DLMS/COSEM application layer services . 23
4.3 DLMS/COSEM application layer protocols . 25
5 Information security in DLMS/COSEM . 25
5.1 Definitions . 25
5.2 General . 25
5.3 Data access security . 26
5.3.1 Overview . 26
5.3.2 No security (lowest level security) authentication . 26
5.3.3 Low Level Security (LLS) authentication . 26
5.3.4 High Level Security (HLS) authentication . 27
5.4 Data transport security . 30
5.4.1 Applying, removing or checking the protection: ciphering and
deciphering . 30
5.4.2 Security context . 31
5.4.3 Security policy . 31
5.4.4 Security suite . 32
5.4.5 Security material . 32
5.4.6 Ciphered xDLMS APDUs . 32
5.4.7 Cryptographic keys . 36
5.4.8 The Galois/Counter Mode of Operation (GCM) . 39
6 DLMS/COSEM application layer service specification . 48
6.1 Service primitives and parameters . 48
6.2 The COSEM-OPEN service . 50
6.3 The COSEM-RELEASE service . 55
6.4 COSEM-ABORT service . 58
6.5 Security parameters .
6.5 Protection and general block transfer parameters . 58
6.6 The GET service . 63
6.7 The SET service . 66
6.8 The ACTION service . 68
6.9 The DataNotification service . 72
6.10 The EventNotification service . 73

6.11 The TriggerEventNotificationSending service . 74
6.12 Variable access specification . 75
6.13 The Read service . 75
6.14 The Write service . 79
6.15 The UnconfirmedWrite service . 82
6.16 The InformationReport service . 83
6.17 Client side layer management services: the SetMapperTable.request . 84
6.18 Summary of services and LN/SN data transfer service mapping . 85
7 DLMS/COSEM application layer protocol specification . 85
7.1 The control function . 85
7.1.1 State definitions of the client side control function . 85
7.1.2 State definitions of the server side control function . 87
7.2 The ACSE services and APDUs . 88
7.2.1 ACSE functional units, services and service parameters . 88
7.2.2 Registered COSEM names . 91
7.2.3 APDU encoding rules . 93
7.2.4 Protocol for application association establishment . 93
7.2.5 Protocol for application association release . 99
7.3 Protocol for the data transfer services . 102
7.3.1 Negotiation of services and options – the conformance block . 102
7.3.2 Confirmed and unconfirmed service invocations . 103
7.3.3 Protocol for the GET service . 105
7.3.4 Protocol for the SET service . 108
7.3.5 Protocol for the ACTION service . 111
7.3.6 Protocol of the DataNotification service . 113
7.3.7 Protocol for the EventNotification service . 113
7.3.8 Protocol for the Read service . 113
7.3.9 Protocol for the Write service . 117
7.3.10 Protocol for the UnconfirmedWrite service . 121
7.3.11 Protocol for the InformationReport service . 122
7.3.12 Protocol of general block transfer mechanism . 123
8 Abstract syntax of ACSE and COSEM APDUs . 134
Annex A (normative) Using the COSEM application layer in various communications
profiles . 149
A.1 General . 149
A.2 Targeted communication environments . 149
A.3 The structure of the profile . 149
A.4 Identification and addressing schemes . 149
A.5 Supporting layer services and service mapping . 150
A.6 Communication profile specific parameters of the COSEM AL services . 150
A.7 Specific considerations / constraints using certain services within a given
profile . 150
A.8 The 3-layer, connection-oriented, HDLC based communication profile . 150
A.9 The TCP-UDP/IP based communication profiles (COSEM_on_IP) . 150
A.10 The S-FSK PLC profile . 150
Annex B (normative) SMS short wrapper . 151
Annex C (informative) AARQ and AARE encoding examples . 152
C.1 General . 152
C.2 Encoding of the xDLMS InitiateRequest / InitiateResponse APDUs . 152

– 4 – IEC 62056-5-3:2016 RLV  IEC 2016
C.3 Specification of the AARQ and AARE APDUs . 155
C.4 Data for the examples . 156
C.5 Encoding of the AARQ APDU .
...

IEC 62056-5-3 ®
Edition 2.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electricity metering data exchange – The DLMS/COSEM suite –
Part 5-3: DLMS/COSEM application layer

Échange des données de comptage de l'électricité – La suite DLMS/COSEM –
Partie 5-3: Couche application DLMS/COSEM

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.

IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 20 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 15 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.

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The advanced search enables to find IEC publications by a 65 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
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IEC 62056-5-3 ®
Edition 2.0 2016-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electricity metering data exchange – The DLMS/COSEM suite –

Part 5-3: DLMS/COSEM application layer

Échange des données de comptage de l'électricité – La suite DLMS/COSEM –

Partie 5-3: Couche application DLMS/COSEM

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220; 35.110; 91.140.50 ISBN 978-2-8322-3019-0

– 2 – IEC 62056-5-3:2016  IEC 2016
CONTENTS
FOREWORD. 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 11
3 Terms, definitions and abbreviations . 13
3.1 Terms and definitions . 13
3.2 Abbreviations . 13
4 Overview . 15
4.1 DLMS/COSEM application layer structure . 15
4.2 DLMS/COSEM application layer services . 16
4.2.1 ASO services . 16
4.2.2 Services provided for application association establishment and release . 16
4.2.3 Services provided for data transfer . 17
4.2.4 Layer management services . 22
4.2.5 Summary of DLMS/COSEM application layer services . 22
4.3 DLMS/COSEM application layer protocols . 22
5 Information security in DLMS/COSEM . 23
5.1 Definitions . 23
5.2 General . 23
5.3 Data access security . 24
5.3.1 Overview . 24
5.3.2 No security (lowest level security) authentication . 24
5.3.3 Low Level Security (LLS) authentication . 24
5.3.4 High Level Security (HLS) authentication . 25
5.4 Data transport security . 27
5.4.1 Applying, removing or checking the protection: ciphering and
deciphering . 27
5.4.2 Security context . 28
5.4.3 Security policy . 28
5.4.4 Security suite . 29
5.4.5 Security material . 29
5.4.6 Ciphered xDLMS APDUs . 29
5.4.7 Cryptographic keys . 31
5.4.8 The Galois/Counter Mode of Operation (GCM) . 34
6 DLMS/COSEM application layer service specification . 43
6.1 Service primitives and parameters . 43
6.2 The COSEM-OPEN service . 45
6.3 The COSEM-RELEASE service . 50
6.4 COSEM-ABORT service . 52
6.5 Protection and general block transfer parameters . 53
6.6 The GET service . 57
6.7 The SET service . 59
6.8 The ACTION service . 62
6.9 The DataNotification service . 66
6.10 The EventNotification service . 67
6.11 The TriggerEventNotificationSending service . 68

6.12 Variable access specification . 69
6.13 The Read service . 69
6.14 The Write service . 73
6.15 The UnconfirmedWrite service . 76
6.16 The InformationReport service . 77
6.17 Client side layer management services: the SetMapperTable.request . 78
6.18 Summary of services and LN/SN data transfer service mapping . 78
7 DLMS/COSEM application layer protocol specification . 79
7.1 The control function . 79
7.1.1 State definitions of the client side control function . 79
7.1.2 State definitions of the server side control function . 81
7.2 The ACSE services and APDUs . 82
7.2.1 ACSE functional units, services and service parameters . 82
7.2.2 Registered COSEM names . 85
7.2.3 APDU encoding rules . 87
7.2.4 Protocol for application association establishment . 87
7.2.5 Protocol for application association release . 92
7.3 Protocol for the data transfer services . 95
7.3.1 Negotiation of services and options – the conformance block . 95
7.3.2 Confirmed and unconfirmed service invocations . 96
7.3.3 Protocol for the GET service . 98
7.3.4 Protocol for the SET service . 101
7.3.5 Protocol for the ACTION service . 104
7.3.6 Protocol of the DataNotification service . 106
7.3.7 Protocol for the EventNotification service . 1
...