EN 62056-5-3:2016

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Datenkommunikation der elektrischen Energiemessung - DLMS/COSEM - Teil 5-3: DLMS/COSEM-AnwendungsschichtÉchange des données de comptage de l'électricité - La suite DLMS/COSEM - Partie 5-3: Couche application DLMS/COSEMElectricity metering data exchange - The DLMS/COSEM suite - Part 5-3: DLMS/COSEM application layer91.140.50Sistemi za oskrbo z elektrikoElectricity supply systems35.100.70Uporabniški slojApplication layer17.220.20Measurement of electrical and magnetic quantitiesICS:Ta slovenski standard je istoveten z:EN 62056-5-3:2016SIST EN 62056-5-3:2017en01-februar-2017SIST EN 62056-5-3:2017SLOVENSKI
STANDARDSIST EN 62056-5-3:20141DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 62056-5-3
December 2016 ICS 17.220; 35.110; 91.140.50 Supersedes EN 62056-5-3:2014
English Version
Electricity metering data exchange - The DLMS/COSEM suite - Part 5-3: DLMS/COSEM application layer (IEC 62056-5-3:2016)
Échange des données de comptage de l'électricité - La suite DLMS/COSEM - Partie 5-3: Couche application DLMS/COSEM (IEC 62056-5-3:2016)
Datenkommunikation der elektrischen Energiemessung - DLMS/COSEM - Teil 5-3: DLMS/COSEM-Anwendungsschicht (IEC 62056-5-3:2016) This European Standard was approved by CENELEC on 2016-04-08. 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. 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 © 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 62056-5-3:2016 E
The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2017-06-09 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-12-09
This document supersedes EN 62056-5-3:2014.
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.
This document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association.
Endorsement notice The text of the International Standard IEC 62056-5-3:2016 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61334-4-3:1996 NOTE Harmonized as EN 61334-4-32:1996 (not modified). IEC 61334-4-511:2000 NOTE Harmonized as EN 61334-4-511:2000 (not modified). IEC 61334-4-512:2001 NOTE Harmonized as EN 61334-4-512:2002 (not modified). IEC 61334-5-1:2001 NOTE Harmonized as EN 61334-5-1:2001 (not modified). IEC 62056-7-6:2013 NOTE Harmonized as EN 62056-7-6:2013 (not modified). IEC 62056-9-7:2013 NOTE Harmonized as EN 62056-9-7:2013 (not modified). ISO/IEC 7498-1:1994 NOTE Harmonized as EN ISO/IEC 7498-1:1994 1) (not modified).
1) Withdrawn publication.
Normative references to international 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 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu
Publication Year Title EN/HD Year
IEC 61334-4-41 1996
Distribution automation using distribution line carrier systems -
Part 4: Data communication protocols - Section 41: Application protocols - Distribution line message specification EN 61334-4-41 1996
IEC 61334-6 2000
Distribution automation using distribution line carrier systems -
Part 6: A-XDR encoding rule EN 61334-6 2000
IEC/TR 62051 1999
Electricity metering - Glossary of terms - -
IEC/TR 62051-1 2004
Electricity metering - Data exchange for meter reading, tariff and load control - Glossary of terms -
Part 1: Terms related to data exchange with metering equipment using DLMS/COSEM - -
IEC 62056-1-0 -
Electricity metering data exchange -
The DLMS/COSEM suite -
Part 1-0: Smart metering standardisation framework EN 62056-1-0 -
IEC 62056-6-1 2015
Electricity metering data exchange -
The DLMS/COSEM suite -
Part 6-1: Object Identification System (OBIS) EN 62056-6-1 2016
IEC 62056-6-2 2016
Electricity metering data exchange -
The DLMS/COSEM suite -
Part 6-2: COSEM interface classes EN 62056-6-2 2016 IEC 62056-8-3 2013
Electricity metering data exchange -
The DLMS/COSEM suite -
Part 8-3: Communication profile for PLC
S-FSK neighbourhood networks EN 62056-8-3 2013
ISO/IEC 8824-1 2008 2) Information technology - Abstract Syntax Notation One (ASN.1): Specification of basic notation - -
2) Superseded by ISO/IEC 8824-1:2015.

ISO/IEC 8825-1 2008 3) Information technology - ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER) - -
ISO/IEC 15953 1999
Information technology - Open Systems Interconnection - Service Definition for the Application Service Object Association Control Service Element - -
ISO/IEC 15954 1999
Information technology - Open Systems Interconnection - Connection-mode protocol for the Application Service Object Association Control Service Element - -
FIPS PUB 180-4 2012 Secure Hash Standard (SHS) - -
FIPS PUB 197 2001
Advanced Encryption Standard (AES) - -
NIST SP 800-38D 2007 Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode (GCM) and GMAC - -
NIST SP 800-57 2007 Recommendation for key management - Part 1: General - -
RFC 1321 1992 The MD5 Message-Digest Algorithm. Edited by R. Rivest (MIT Laboratory for Computer Science and RSA Data Security, Inc.) - -
RFC 3394 2002 Advanced Encryption Standard (AES) Key Wrap Algorithm. Edited by J. Schaad (Soaring Hawk Consulting) and R. Housley (RSA Laboratories) - -
RFC 4106 -
The Use of Galois/Counter Mode (GCM)
in IPsec Encapsulating Security Payload (ESP) - -
3) Superseded by ISO/IEC 8825-1:2015.

IEC 62056-5-3
Edition 2.0 2016-03
INTERNATIONAL STANDARD NORME INTERNATIONALE 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
colourinside
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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

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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 . 106 7.3.8 Protocol for the Read service . 106 7.3.9 Protocol for the Write service . 110 7.3.10 Protocol for the UnconfirmedWrite service . 114 7.3.11 Protocol for the InformationReport service . 115 7.3.12 Protocol of general block transfer mechanism . 116 8 Abstract syntax of ACSE and COSEM APDUs . 127 Annex A (normative)
Using the COSEM application layer in various communications profiles . 142 A.1 General . 142 A.2 Targeted communication environments . 142 A.3 The structure of the profile . 142 A.4 Identification and addressing schemes . 142 A.5 Supporting layer services and service mapping . 143 A.6 Communication profile specific parameters of the COSEM AL services . 143 A.7 Specific considerations / constraints using certain services within a given profile . 143 A.8 The 3-layer, connection-oriented, HDLC based communication profile . 143 A.9 The TCP-UDP/IP based communication profiles (COSEM_on_IP) . 143 A.10 The S-FSK PLC profile . 143 Annex B (normative)
SMS short wrapper . 144 Annex C (informative)
AARQ and AARE encoding examples . 145 C.1 General . 145 C.2 Encoding of the xDLMS InitiateRequest / InitiateResponse APDUs . 145 C.3 Specification of the AARQ and AARE APDUs . 148

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C.4 Data for the examples . 149 C.5 Encoding of the AARQ APDU . 150 C.6 Encoding of the AARE APDU . 153 Annex D (informative)
Encoding examples: AARQ and AARE APDUs using a ciphered application context . 159 D.1 A-XDR encoding of the xDLMS InitiateRequest APDU, carrying a dedicated key . 159 D.2 Authenticated encryption of the xDLMS InitiateRequest APDU . 160 D.3 The AARQ APDU . 161 D.4 A-XDR encoding of the xDLMS InitiateResponse APDU . 162 D.5 Authenticated encryption of the xDLMS InitiateResponse APDU . 163 D.6 The AARE APDU. 164 D.7 The RLRQ APDU (carrying a ciphered xDLMS InitiateRequest APDU) . 165 D.8 The RLRE APDU (carrying a ciphered xDLMS InitiateResponse APDU) . 166 Annex E (informative)
Data transfer service examples . 167 Annex F (informative)
Overview of cryptography . 183 F.1 General . 183 F.2 Hash functions . 183 F.3 Symmetric key algorithms . 184 F.3.1 General . 184 F.3.2 Encryption and decryption . 184 F.3.3 Advanced Encryption Standard (AES) . 185 F.3.4 Encryption Modes of Operation . 185 F.3.5 Message Authentication Code . 186 F.3.6 Key establishment . 187 F.4 Asymmetric key algorithms . 187 F.4.1 General . 187 F.4.2 Digital signatures . 188 F.4.3 Key establishment . 188 Annex G (informative)
Significant technical changes with respect to IEC 62056-5-3 Ed.1.0:2013 . 189 Bibliography . 191 Index . 194
Figure 1 – Structure of the COSEM Application layers . 15 Figure 2 – Summary of DLMS/COSEM AL services . 22 Figure 3 – Authentication mechanisms during AA establishment . 27 Figure 4 – Structure of service specific global ciphering and dedicated ciphering APDUs . 30 Figure 5 – Structure of general global ciphering and dedicated ciphering APDUs . 30 Figure 6 – Cryptographic protection of xDLMS APDUs using GCM . 37 Figure 7 – Service primitives . 43 Figure 8 – Time sequence diagrams . 44 Figure 9 – Additional service parameters to control cryptographic protection and general block transfer . 54 Figure 10 – Partial state machine for the client side control function . 80 Figure 11 – Partial state machine for the server side control function . 81

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Figure 12 – MSC for successful AA establishment preceded by a
successful lower layer connection establishment . 88 Figure 13 – Graceful AA release using the A-RELEASE service . 93 Figure 14 – Graceful AA release by disconnecting the supporting layer . 94 Figure 15 – Aborting an AA following a PH-ABORT.indication . 95 Figure 16 – MSC of the GET service . 98 Figure 17 – MSC of the GET service with block transfer . 99 Figure 18 – MSC of the GET service with block transfer, long GET aborted . 101 Figure 19 – MSC of the SET service . 102 Figure 20 – MSC of the SET service with block transfer . 102 Figure 21 – MSC of the ACTION service . 104 Figure 22 – MSC of the ACTION service with block transfer . 105 Figure 23 – MSC of the Read service used for reading an attribute . 109 Figure 24 – MSC of the Read service used for invoking a method . 109 Figure 25 – MSC of the Read Service used for reading an attribute, with block transfer . 110 Figure 26 – MSC of the Write service used for writing an attribute . 113 Figure 27 – MSC of the Write service used for invoking a method . 113 Figure 28 – MSC of the Write service used for
writing an attribute, with block transfer . 114 Figure 29 – MSC of the Unconfirmed Write service used for writing an attribute . 115 Figure 30 – Partial service invocations and GBT APDUs . 118 Figure 31 – GET service with GBT, switching to streaming . 120 Figure 32 – GET service with partial invocations, GBT and streaming, recovery of 4th block sent in the 2nd stream . 121 Figure 33 – GET service with partial invocations, GBT and streaming, recovery of 4th and 5th blocks . 122 Figure 34 – GET service with partial invocations, GBT and streaming, recovery of last block . 123 Figure 35 – SET service with GBT, with server not supporting streaming, recovery of 3rd block . 124 Figure 36 – ACTION-WITH-LIST service with bi-directional GBT and block recovery . 125 Figure 37 – DataNotification service with GBT with partial invocation . 126 Figure B.1 – Short wrapper . 144 Figure F.1 – Hash function . 184 Figure F.2 – Encryption and decryption . 185 Figure F.3 – Message Authentication Codes (MACs) . 186
Table 1 – Clarification of the meaning of PDU Size for DLMS/COSEM . 18 Table 2 – Security suites . 29 Table 3 – Ciphered xDLMS APDUs . 29 Table 4 – Use of the fields of the ciphered APDUs . 31 Table 5 – Cryptographic keys and their management . 34 Table 6 – Security control byte . 38 Table 7 – Plaintext and additional authenticated data . 38 Table 8 – Example for ciphered APDUs . 40 Table 9 – HLS example with GMAC . 42

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Table 10 – Codes for AL service parameters . 45 Table 11 – Service parameters of the COSEM-OPEN service primitives . 46 Table 12 – Service parameters of the COSEM-RELEASE service primitives . 50 Table 13 – Service parameters of the COSEM-ABORT service primitives . 53 Table 14 – Additional service parameters . 55 Table 15 – Security parameters . 56 Table 16 – Service parameters of the GET service . 57 Table 17 – GET service request and response types . 58 Table 18 – Service parameters of the SET service . 60 Table 19 – SET service request and response types . 61 Table 20 – Service parameters of the ACTION service . 63 Table 21 – ACTION service request and response types . 64 Table 22 – Service parameters of the DataNotification service primitives . 66 Table 23 – Service parameters of the EventNotification service primitives . 67 Table 24 – Service parameters of the TriggerEventNotificationSending.request service primitive . 68 Table 25 – Variable Access Specification . 69 Table 26 – Service parameters of the Read service . 70 Table 27 – Use of the Variable_Access_Specification variants
and the Read.response choices . 71 Table 28 – Service parameters of the Write service . 74 Table 29 – Use of the Variable_Access_Specification variants and the Write.response choices . 74 Table 30 – Service parameters of the UnconfirmedWrite service . 76 Table 31 – Use of the Variable_Access_Specification variants . 77 Table 32 – Service parameters of the InformationReport service . 78 Table 33 – Service parameters of the SetMapperTable.request service primitives . 78 Table 34 – Summary of ACSE services . 79 Table 35 – Summary of xDLMS services for LN referencing . 79 Table 36 – Summary of xDLMS services for SN referencing . 79 Table 37 – ACSE functional units, services and service parameters . 83 Table 38 – Use of ciphered / unciphered APDUs . 86 Table 39 – xDLMS Conformance block . 96 Table 40 – GET service types and APDUs . 98 Table 41 – SET service types and APDUs . 101 Table 42 – ACTION service types and APDUs . 104 Table 43 – Mapping between the GET and the Read services . 107 Table 44 – Mapping between the ACTION and the Read services . 108 Table 45 – Mapping between the SET and the Write services . 111 Table 46 – Mapping between the ACTION and the Write service . 112 Table 47 – Mapping between the SET and the UnconfirmedWrite services . 115 Table 48 – Mapping between the ACTION and the UnconfirmedWrite services . 115 Table 49 – Mapping between the EventNotification and InformationReport services . 116 Table B.1 – Reserved Application Processes . 144

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Table C.1 – Conformance block . 146 Table C.2 – A-XDR encoding of the xDLMS InitiateRequest APDU . 147 Table C.3 – A-XDR encoding of the xDLMS InitiateResponse APDU . 148 Table C.4 – BER encoding of the AARQ APDU . 151 Table C.5 – Complete AARQ APDU . 153 Table C.6 – BER encoding of the AARE APDU . 154 Table C.7 – The complete AARE APDU . 158 Table D.1 – A-XDR encoding of the xDLMS InitiateRequest APDU . 159 Table D.2 – Authenticated encryption of the xDLMS InitiateRequest APDU . 160 Table D.3 – BER encoding of the AARQ APDU . 161 Table D.4 – A-XDR encoding of the xDLMS InitiateResponse APDU . 163 Table D.5 – Authenticated encryption of the xDLMS InitiateResponse APDU . 163 Table D.6 – BER encoding of the AARE APDU . 164 Table D.7 – BER encoding of the RLRQ APDU . 166 Table D.8 – BER encoding of the RLRE APDU . 166 Table E.1 – Objects used in the examples . 167 Table E.2 – Example: Reading the value of a single attribute without block transfer . 168 Table E.3 – Example: Reading the value of a list of attributes without block transfer. 169 Table E.4 – Example: Reading the value of a single attribute with block transfer . 171 Table E.5 – Example: Reading the value of a list of attributes with block transfer . 173 Table E.6 – Example: Writing the value of a single attribute without block transfer . 176 Table E.7 – Example: Writing the value of a list of attributes without block transfer . 177 Table E.8 – Example: Writing the value of a single attribute with block transfer . 178 Table E.9 – Example: Writing the value of a list of attributes with block transfer . 180

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INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
ELECTRICITY METERING DATA EXCHANGE –
THE DLMS/COSEM SUITE –
Part 5-3: DLMS/COSEM application layer
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 62056-5-3 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: DLMS1 User Association Zug/Switzerland www.dlms.com ______________ 1
Device Language Message Specification.

IEC 62056-5-3:2016  IEC 2016 – 9 –
International Standard IEC 62056-5-3 has been prepared by IEC technical committee 13: Electrical energy measurement and control. This second edition cancels and replaces the first edition of IEC 62056-5-3 published in 2013. It constitutes a technical revision. The significant technical changes with respect to the previous edition are listed in Annex G (informative). The text of this standard is based on the following documents: FDIS Report on voting 13/1648/FDIS 13/1657/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. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC website 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.

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INTRODUCTION This second edition of IEC 62056-5-3 has been prepared by IEC TC13 WG14 with a significant contribution of the DLMS User Association, its D-type liaison partner. This edition is in line with the DLMS UA Green Book Edition 7.0 Amendment 3. The main new features are the DataNotification service, the general protection and the general block transfer mechanisms and the SMS short wrapper. In 2014, the DLMS UA has published Green Book Edition 8.0 adding several new features regarding functionality, efficiency and security while keeping full backwards compatibility. The intention of the DLMS UA is to bring also these latest developments to international standardization. Therefore, IEC TC13 WG14 launched a project to bring these new elements also to the IEC 62056 series that will lead to Edition 3.0 of the standard. Clause 5 and Annex F are based on parts of NIST documents. Reprinted courtesy of the National Institute of Standards and Technology, Technology Administration, U.S. Department of Commerce.

IEC 62056-5-3:2016  IEC 2016 – 11 –
ELECTRICITY METERING DATA EXCHANGE –
THE DLMS/COSEM SUITE –
Part 5-3: DLMS/COSEM application layer
1 Scope This part of IEC 62056 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. Annex A (normative) defines how to use the COSEM application layer in various communication profiles. It specifies how various communication profiles can be constructed for exchanging data with metering equipment using the COSEM interface model, and what are the necessary elements to specify in each communication profile. The actual, media-specific communication profiles are specified in separate parts of the IEC 62056 series. Annex B (normative) specifies the SMS short wrapper. Annex C, Annex D and Annex E (informative) include encoding examples for APDUs. Annex F (informative) provides an overview of cryptography. An
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