Electricity metering data exchange - The DLMS/COSEM suite - Part 7-3: Wired and wireless M-Bus communication profiles for local and neighbourhood networks

This International Standard specifies DLMS/COSEM wired and wireless M-Bus communication
profiles for local and neighbourhood networks.
Setting up and managing the M-Bus communication channels of M-Bus devices, the M-Bus
network, registering slave devices and – when required – repeaters is out of the scope of this
International Standard.
The scope of this communication profile standard is restricted to aspects concerning the use
of communication protocols in conjunction with the COSEM data model and the
DLMS/COSEM application layer. Data structures specific to a communication protocol are out
of the scope of this standard. Any project-specific definitions of data structures and data
contents may be provided in project-specific companion specifications.
Annex A (informative) provides information on M-Bus frame structures, addressing schemes
and an encoding example.
Annex B (normative) points to COSEM interface classes to set up and manage the wired and
wireless M-Bus communication channel.
Annex C (informative) provides MSCs for representative instances of communication.

Datenkommunikation der elektrischen Energiemessung - DLMS/COSEM - Teil 7-3: Kommunikationsprofile für drahtgebundenen und funkbasierten M-Bus für lokale und Areal-Netze

Échange des données de comptage de l’électricité - La suite DLMS/COSEM - Partie 7-3: Profils de communication M-Bus filaires et sans fil pour les réseaux locaux et de voisinage

IEC 62056-7-3:2017 spécifie les profils de communication M-Bus DLMS/COSEM filaire et sans fil pour les réseaux locaux et de voisinage. Il se limite aux aspects relatifs à l'utilisation des protocoles de communication conjointement avec le modèle de données COSEM et la couche application DLMS/COSEM.

Izmenjava podatkov pri merjenju električne energije - Niz DLMS/COSEM - 7-3. del: Profili ožičene in brezžične M-Bus izmenjave podatkov za lokalna in sosednja omrežja

Ta mednarodni standard določa DLMS/COSEM profile ožičene in brezžične M-Bus izmenjave podatkov za lokalna in sosednja omrežja.
Vzpostavitev in upravljanje komunikacijskih kanalov M-Bus naprav M-Bus, omrežja M-Bus, registriranje podrejenih naprav in – če je potrebno – ponavljalniki ne spadajo na področje uporabe tega mednarodnega standarda.
Področje uporabe tega standarda za komunikacijske profile je omejeno na uporabo komunikacijskih protokolov v povezavi s podatkovnim modelom COSEM in aplikacijsko ravnjo DLMS/COSEM. Podatkovne strukture, značilne za določen komunikacijski protokol, ne spadajo na področje uporabe tega standarda. Morebitne definicije podatkovnih struktur in vsebine podatkov za posamezen projekt so lahko vključene v spremljevalnih specifikacijah za posamezen projekt.
Dodatek A (informativni) podaja informacije o strukturnih okvirih M-Bus, shemah naslavljanja in primerih kodiranja.
Dodatek B (normativni) opredeljuje vmesniške razrede COSEM za vzpostavitev in upravljanje komunikacijskih kanalov M-Bus.
Dodatek C (informativni) ponuja MSC-je za reprezentativne primere komunikacije.

General Information

Status
Published
Publication Date
17-Aug-2017
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
19-Jul-2017
Due Date
23-Sep-2017
Completion Date
18-Aug-2017

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SLOVENSKI STANDARD
SIST EN 62056-7-3:2017
01-september-2017
,]PHQMDYDSRGDWNRYSULPHUMHQMXHOHNWULþQHHQHUJLMH1L]'/06&26(0GHO
3URILOLRåLþHQHLQEUH]åLþQH0%XVL]PHQMDYHSRGDWNRY]DORNDOQDLQVRVHGQMD
RPUHåMD
Electricity metering data exchange - The DLMS/COSEM suite - Part 7-3: Wired and
wireless M-Bus communication profiles for local and neighbourhood networks
Ta slovenski standard je istoveten z: EN 62056-7-3:2017
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 62056-7-3:2017 en

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

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD EN 62056-7-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2017
ICS 17.220.20; 35.100.01; 91.140.50
English Version
Electricity metering data exchange - The DLMS/COSEM suite -
Part 7-3: Wired and wireless M-Bus communication profiles for
local and neighbourhood networks
(IEC 62056-7-3:2017)

Échange des données de comptage de l'électricité - La Datenkommunikation der elektrischen Energiemessung -

suite DLMS/COSEM - Partie 7-3: Profils de communication DLMS/COSEM - Teil 7-3: Kommunikationsprofile für

M-Bus filaires et sans fil pour les réseaux locaux et de drahtgebundenen und funkbasierten M-Bus für lokale und

voisinage Areal-Netze
(IEC 62056-7-3:2017) (IEC 62056-7-3:2017)

This European Standard was approved by CENELEC on 2017-04-11. 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, Serbia, 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

© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 62056-7-3:2017 E
---------------------- Page: 2 ----------------------
EN 62056-7-3:2017
European foreword

The text of document 13/1729/FDIS, future edition 1 of IEC 62056-7-3, prepared by

IEC/TC 13 "Electrical energy measurement and control" was submitted to the IEC-CENELEC parallel

vote and approved by CENELEC as EN 62056-7-3:2017.
The following dates are fixed:
(dop) 2018-01-11
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-04-11
standards conflicting with the
document have to be withdrawn

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 62056-7-3:2017 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 60870-5-1:1990 NOTE Harmonized as EN 60870-5-1:1993 (not modified).
IEC 62056-1-0 NOTE Harmonized as EN 62056-1-0.
IEC 62056-7-5 NOTE Harmonized as EN 62056-7-5.
---------------------- Page: 3 ----------------------
EN 62056-7-3:2017
Annex ZA
(normative)
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
- - Communication systems for meters - EN 13757-1 -
Part 1: Data exchange
- - Communication systems for meters and EN 13757-2 2004
remote reading of meters -
Part 2: Physical and link layer
- - Communication systems for meters and EN 13757-3 2013
remote reading of meters -
Part 3: Dedicated application layer
- - Communication systems for meters and EN 13757-4 2013
remote reading of meters -
Part 4: Wireless meter readout (Radio
meter reading for operation in SRD bands)
IEC 62056-5-3 2016 Electricity metering data exchange - EN 62056-5-3 2016
The DLMS/COSEM suite -
Part 5-3: DLMS/COSEM application layer
IEC 62056-6-1 2015 Electricity metering data exchange - EN 62056-6-1 2016
The DLMS/COSEM suite -
Part 6-1: Object Identification System
(OBIS)
IEC 62056-6-2 2016 Electricity metering data exchange - EN 62056-6-2 2016
The DLMS/COSEM suite -
Part 6-2: COSEM interface classes
1) 1)
IEC 62056-6-2 - Electricity metering data exchange - EN 62056-6-2 -
The DLMS/COSEM suite -
Part 6-2: COSEM interface classes
At draft stage.
---------------------- Page: 4 ----------------------
IEC 62056-7-3
Edition 1.0 2017-03
INTERNATIONAL
STANDARD
colour
inside
Electricity metering data exchange – The DLMS/COSEM suite –
Part 7-3: Wired and wireless M-Bus communication profiles for local and
neighbourhood networks
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20; 35.100.01; 91.140.50 ISBN 978-2-8322-4012-0

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

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 5 ----------------------
– 2 – IEC 62056-7-3:2017 © IEC 2017
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms, definitions and abbreviated terms ........................................................................ 8

3.1 Terms and definitions.............................................................................................. 8

3.2 Abbreviated terms ................................................................................................... 8

4 Targeted communication environments ............................................................................ 9

5 Use of the communication layers for this profile ............................................................... 9

5.1 Information related to the use of the standard specifying the lower layers ............... 9

5.2 Structure of the communication profiles .................................................................. 9

5.3 Lower protocol layers and their use ...................................................................... 10

5.3.1 Physical layer ................................................................................................ 10

5.3.2 Link layer ....................................................................................................... 10

5.3.3 Transport layer .............................................................................................. 11

5.4 Service mapping and adaptation layers ................................................................. 11

5.4.1 Overview ....................................................................................................... 11

5.4.2 MBUS-DATA service primitives ...................................................................... 12

5.4.3 MBUS-DATA protocol specification ................................................................ 14

5.5 Registration and connection management ............................................................. 16

6 Identification and addressing scheme ............................................................................ 16

6.1 Overview .............................................................................................................. 16

6.2 Link Layer Address for wired M-Bus ...................................................................... 17

6.3 Link Layer Address for wireless M-Bus ................................................................. 18

6.4 Link Layer Address for M-Bus broadcast ............................................................... 18

6.5 Transport layer address ........................................................................................ 19

6.6 Application addressing extension – M-Bus wrapper ............................................... 21

7 Specific considerations and constraints for using certain services within profile ............. 22

7.1 Overview .............................................................................................................. 22

7.2 Application association establishment and release: ACSE services ....................... 22

7.3 xDLMS services .................................................................................................... 23

7.3.1 Request – response type services ................................................................. 23

7.3.2 Unsolicited services ....................................................................................... 23

7.3.3 Broadcast messages ..................................................................................... 23

7.4 Security mechanisms ............................................................................................ 24

7.5 Transporting long application messages ............................................................... 24

7.6 Media access, bandwidth and timing considerations ............................................. 24

8 Communication configuration and management ............................................................. 24

Annex A (informative) M-Bus frame structures, addressing schemes and examples ............. 25

A.1 General ................................................................................................................. 25

A.2 None, short or long M-Bus data header ................................................................. 26

A.2.1 Wired M-Bus .................................................................................................. 26

A.2.2 Wireless M-Bus ............................................................................................. 27

A.3 Encoding example: Data-Notification carrying daily billing data ............................. 30

A.3.1 Overview ....................................................................................................... 30

A.3.2 Example: Daily billing data............................................................................. 31

---------------------- Page: 6 ----------------------
IEC 62056-7-3:2017 © IEC 2017 – 3 –
Annex B (normative) New COSEM interface classes related to the M-Bus

communication profiles ......................................................................................................... 33

Annex C (informative) Message sequence charts ................................................................. 34

Bibliography .......................................................................................................................... 37

Figure 1 – Entities and interfaces of a smart metering system using the terminology of

IEC 62056-1-0 ........................................................................................................................ 9

Figure 2 – The DLMS/COSEM wired and wireless M-Bus communication profiles ................. 10

Figure 3 – Summary of DLMS/COSEM M-Bus-based TL services ......................................... 12

Figure 4 – Identification and addressing scheme in the wired M-Bus profile ......................... 17

Figure 5 – Link Layer Address for wireless M-Bus ................................................................. 18

Figure 6 – M-Bus TPDU formats ........................................................................................... 20

Figure 7 – CI without M-Bus data header .......................................................................... 20

Figure A.1 – M-Bus communication paths direct or cascaded ................................................ 25

Figure A.2 – Wired M-Bus frame structure, none M-Bus data header .................................... 27

Figure A.3 – Wired M-Bus frame structure with long M-Bus data header ............................... 27

Figure A.4 – Wireless M-Bus frame structure with short ELL, no M-Bus data header ............. 29

Figure A.5 – Wireless M-Bus frame structure with long ELL, no M-Bus data header .............. 29

Figure A.6 – Wireless M-Bus frame structure with long ELL and long M-Bus data

header .................................................................................................................................. 30

Figure A.7 – Daily billing data without / with DLMS/COSEM security applied ......................... 32

Figure C.1 – MSC for the COSEM-OPEN service for wired M-Bus, no M-Bus header ............ 35

Figure C.2 – MSC the GET service for wired M-Bus, no M-Bus header ................................. 36

Table 1 – Wired M-Bus Link Layer Addresses ....................................................................... 18

Table 2 – DLMS/COSEM M-Bus-based TL CI values ........................................................ 19

Table 3 – CI fields used for link management purposes ........................................................ 21

Table 4 – Client and server SAPs ......................................................................................... 21

Table 5 – Application associations and data exchange in the M-Bus-based profiles .............. 22

Table A.1 – Example: Daily billing data ................................................................................. 31

---------------------- Page: 7 ----------------------
– 4 – IEC 62056-7-3:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICITY METERING DATA EXCHANGE –
THE DLMS/COSEM SUITE –
Part 7-3: Wired and wireless M-Bus communication
profiles for local and neighbourhood networks
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.
---------------------- Page: 8 ----------------------
IEC 62056-7-3:2017 © IEC 2017 – 5 –

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.com

International Standard IEC 62056-7-3 has been prepared by IEC technical committee 13:

Electrical energy measurement and control.
The text of this standard is based on the following documents:
FDIS Report on voting
13/1729/FDIS 13/1731/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

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

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

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

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.
___________
1 Device Language Message Specification.
---------------------- Page: 9 ----------------------
– 6 – IEC 62056-7-3:2017 © IEC 2017
INTRODUCTION
As defined in IEC 62056-1-0, the IEC 62056 DLMS/COSEM suite provides specific

communication profile standards for communication media relevant for smart metering.

Such communication profile standards specify how the COSEM data model and the

DLMS/COSEM application layer can be used on the lower, communication media-specific

protocol layers.

Communication profile standards refer to communication standards that are part of the

IEC 62056 DLMS/COSEM suite or to any other open communication standard.

This International Standard specifies DLMS/COSEM communication profiles for wired and

wireless M-Bus networks using the lower layers specified in the EN 13757 series.
It follows the rules defined in IEC 62056-5-3, Annex A.
The DLMS/COSEM wired and wireless M-Bus communication profiles for local and

neighbourhood networks may be used for smart energy data exchange with meters as well as

with simple consumer displays and home automation systems.
---------------------- Page: 10 ----------------------
IEC 62056-7-3:2017 © IEC 2017 – 7 –
ELECTRICITY METERING DATA EXCHANGE –
THE DLMS/COSEM SUITE –
Part 7-3: Wired and wireless M-Bus communication
profiles for local and neighbourhood networks
1 Scope

This International Standard specifies DLMS/COSEM wired and wireless M-Bus communication

profiles for local and neighbourhood networks.

Setting up and managing the M-Bus communication channels of M-Bus devices, the M-Bus

network, registering slave devices and – when required – repeaters is out of the scope of this

International Standard.

The scope of this communication profile standard is restricted to aspects concerning the use

of communication protocols in conjunction with the COSEM data model and the

DLMS/COSEM application layer. Data structures specific to a communication protocol are out

of the scope of this standard. Any project-specific definitions of data structures and data

contents may be provided in project-specific companion specifications.

Annex A (informative) provides information on M-Bus frame structures, addressing schemes

and an encoding example.

Annex B (normative) points to COSEM interface classes to set up and manage the wired and

wireless M-Bus communication channel.

Annex C (informative) provides MSCs for representative instances of communication.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements of this document. For dated references, only the edition

cited applies. For undated references, the latest edition of the referenced document (including

any amendments) applies.
IEC 62056-5-3:2016, Electricity metering data exchange – The DLMS/COSEM suite –
Part 5-3: DLMS/COSEM application layer
IEC 62056-6-1:2015, Electricity metering data exchange – The DLMS/COSEM suite –
Part 6-1: Object identification system (OBIS)
IEC 62056-6-2:2016, Electricity metering data exchange – The DLMS/COSEM suite –
Part 6-2: COSEM interface classes

IEC 62056-6-2:— , Electricity metering data exchange – The DLMS/COSEM suite – Part 6-2:

COSEM interface classes
___________
Under preparation. Stage at the time of publication: IEC/CDV 62056-6-2:2016.
---------------------- Page: 11 ----------------------
– 8 – IEC 62056-7-3:2017 © IEC 2017
EN 13757-1, Communication system for meters – Part 1: Data exchange

EN 13757-2:2004, Communication system for and remote reading of meters – Part 2: Physical

and link layer

EN 13757-3:2013, Communication systems for and remote reading of meters – Part 3:

Dedicated application layer

EN 13757-4:2013, Communication systems for meters and remote reading of meters – Part 4:

Wireless meter readout (Radio meter reading for operation in SRD bands)
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 62056-5-3,

IEC 62056-6-1, IEC 62056-6-2 and in the EN 13757 series apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.2 Abbreviated terms
The following M-Bus specific abbreviated terms are used in this standard.
Abbrev. Term Standard domain
ACC Access number field M-Bus
ALA Application Layer Address M-Bus
CFG Configuration byte M-Bus
CI CI field introducing the extended link layer (wireless M-Bus) M-Bus
ELL
CI Field Control Information field M-Bus
CI CI field introducing the transport layer M-Bus
DTSAP Destination Transport Service Access Point Telecontrol
ELL Extended Link Layer M-Bus
ELLA Extended Link Layer Address M-Bus
FIN (bit) Final bit Telecontrol
FT1.2 Data integrity format class FT1.2 Telecontrol
FT3 Data integrity format class FT3 Telecontrol
LLA Link Layer Address M-Bus
MSC Message Sequence Chart General
STS Status byte M-Bus
STSAP Source Transport Service Access Point Telecontrol
TL Transport layer M-Bus
wM-Bus Wireless M-Bus M-Bus
---------------------- Page: 12 ----------------------
IEC 62056-7-3:2017 © IEC 2017 – 9 –
4 Targeted communication environments

In the context of the smart metering architecture introduced in IEC 62056-1-0 and shown in

Figure 1, the wired and wireless M-Bus communication profiles for local and neighbourhood

networks cover the following interfaces:
• the C interface between an NNAP and metering devices;
• the M interface between an LNAP and metering devices;
• the H1 interface between a metering device and a simple consumer display;
• the H2 interface between an LNAP and a home automation system.
In all cases, metering devices act as DLMS/COSEM servers.

On the C and M interface, metering devices act as M-Bus slaves. The M-Bus master is the

NNAP or the LNAP.

On the H1 and H2 interfaces the metering device acts as a DLMS/COSEM server. It may

operate in pull mode or push mode, as M-Bus master or M-Bus slave, depending on the

selection of wired or wireless M-Bus and the operating mode for wireless M-Bus.
Simple
Metering
consumer
device
Home automation
display
system
G1 C M
G1 LNAP Local network H2
access point
C C
NNAP Neighbourhood network H3
access point
HES Head end system
IEC
Figure 1 – Entities and interfaces of a smart metering
system using the terminology of IEC 62056-1-0
5 Use of the communication layers for this profile
5.1 Information related to the use of the standard specifying the lower layers
The DLMS/COSEM wired and wireless M-Bus communication profiles for local and

neighbourhood networks use the lower-layer protocols specified in the EN 13757 series.

Subclause 5.3.3 provides additional information on the use of the M-Bus transport layer in this

communication profile.
5.2 Structure of the communication profiles

The structure of the DLMS/COSEM M-Bus wired and wireless M-Bus communication profiles

is shown in Figure 2.
WAN Wide area network
NN Neighbourhood
LN Local network
---------------------- Page: 13 ----------------------
– 10 – IEC 62056-7-3:2017 © IEC 2017
DLMS/COSEM wired DLMS/COSEM wireless
M-Bus profile M-Bus profile
COSEM data model
DLMS UA Blue book / IEC 62056-6-1, IEC 62056-6-2
M-Bus dedicated
DLMS/COSEM Application layer
application layer
DLMS UA Blue book / IEC 62056-5-3
EN 13757-3
DLMS/COSEM M-Bus based transport layer
M-Bus Wrapper
M-Bus transport layer EN 13757-3
CI =
TL CI =
0x00 – 0x1F
Other values
0x60 / 0x7C
see EN 13757-3
0x61 / 0x7D
M-Bus wired link layer M-Bus wireless link layer
EN 13757-2 EN 13757-4 / EN 13757-5
M-Bus wired Phy layer M-Bus wireless Phy layer
EN 13757-2 / EN 13757-6 EN 13757-4
IEC
Figure 2 – The DLMS/COSEM wired and wireless M-Bus communication profiles
5.3 Lower protocol layers and their use
5.3.1 Physical layer

The physical layer is as specified in EN 13757-2:2004 (wired, twisted pair based) and in

EN 13757-4:2013 (wireless).

For battery-operated masters and/or a small number of connected meters, a wired M-Bus

physical layer is specified in EN 13757-6 (twisted pair based for short distances).

5.3.2 Link layer

The M-Bus link layer is as specified in EN 13757-2:2004 (wired) and in EN 13757-4:2013

(wireless).

NOTE For wireless meter readout EN 13757-5:2015 supports simple retransmission (single-hop repeating) as well

as routed wireless networks
...

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