IEC 62056-62:2002

INTERNATIONAL IEC
STANDARD
62056-62
First edition
2002-02
Electricity metering –
Data exchange for meter reading,
tariff and load control –
Part 62:
Interface classes
Reference number
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INTERNATIONAL IEC
STANDARD
62056-62
First edition
2002-02
Electricity metering –
Data exchange for meter reading,
tariff and load control –
Part 62:
Interface classes
 IEC 2002  Copyright - all rights reserved
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For price, see current catalogue

– 2 – 62056-62  IEC:2002(E)
CONTENTS
FOREWORD.4

INTRODUCTION.6

1 Scope.7

2 Normative references .7

3 Terms, definitions and abbreviations .8

4 Basic principles .9

4.1 General .9
4.2 Class description notation .10
4.3 Common data types.12
4.4 Data formats for date and time notation.12
4.5 The COSEM server model .14
4.6 COSEM logical device.15
4.6.1 General .15
4.6.2 COSEM logical device name.15
4.6.3 The “association view” of the logical device .15
4.6.4 Mandatory contents of a COSEM logical device.15
4.7 Authentication procedures.16
4.7.1 Low level security (LLS) authentication.16
4.7.2 High-level security (HLS) authentication .16
5 The interface classes.17
5.1 Data (class_id: 1) .17
5.2 Register (class_id: 3) .18
5.3 Extended register (class_id: 4) .20
5.4 Demand register (class_id: 5).21
5.5 Register activation (class_id: 6).24
5.6 Profile generic (class_id: 7) .25
5.7 Clock (class_id: 8).29
5.8 Script table (class_id: 9).32
5.9 Schedule (class_id: 10) .33
5.10 Special days table (class_id: 11) .36
5.11 Activity calendar (class_id: 20) .37

5.12 Association LN (class_id: 15) .39
5.13 Association SN (class_id: 12) .43
5.14 SAP assignment (class_id: 17) .45
5.15 Register monitor (class_id: 21) .46
5.16 Utility tables (class_id: 26) .47
5.17 Single action schedule (class_id: 22).48
6 Maintenance of the interface classes .48
6.1 New interface classes.49
6.2 New versions of interface classes.49
6.3 Removal of interface classes.49

62056-62  IEC:2002(E) – 3 –
Annex A (normative) Protocol related interface classes.50

A.1 IEC local port setup (class_id: 19) .50

A.2 PSTN modem configuration (class_id: 27) .51

A.3 PSTN auto answer (class_id: 28).52

A.4 PSTN Auto dial (class_id: 29).54

A.5 IEC HDLC setup (class_id: 23) .55

A.6 IEC twisted pair (1) setup (class_id: 24) .56

Annex B (normative) Data model and protocol .58

Annex C (normative) Using short names for accessing attributes and methods .59

C.1 Guidelines for assigning short names .59
C.2 Reserved base_names for special COSEM objects .64
Annex D (normative) Relation to OBIS .65
D.1 Mapping of data items to COSEM objects and attributes .65
D.1.1 Abstract COSEM objects .65
D.1.2 Electrical energy related COSEM objects .73
D.2 Coding of OBIS identifications .77
Annex E (informative) Previous versions of interface classes.79
Bibliography.80
Index .81
Figure 1 – An interface class and its instances .9
Figure 2 – The COSEM server model.14
Figure 3 – Combined metering device.14
Figure 4 – Overview of the interface classes.17
Figure 5 – The attributes when measuring sliding demand .21
Figure 6 – The attributes when measuring current_average_value
if number of periods is 1 .21
Figure 7 – The attributes if number of periods is 3 .22
Figure 8 – The generalized time concept .30
Figure B. 1 – The three step approach of COSEM.58

– 4 – 62056-62  IEC:2002(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
ELECTRICITY METERING – DATA EXCHANGE

FOR METER READING, TARIFF AND LOAD CONTROL –

Part 62: Interface classes
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
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 62056-62 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 with applicants throughout the world. In this respect, the
statement of the provider of the maintenance service is registered with the IEC. Information (see also chapter 4.6.2
and Annex E) may be obtained from:
DLMS User Association
Geneva / Switzerland
www.dlms.ch
International Standard IEC 62056-62 has been prepared by IEC technical committee 13:
Equipment for electrical energy measurement and load control.
The text of this standard is based on the following documents:
FDIS Report on voting
13/1270/FDIS 13/1276/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.
———————
Device Language Message Specification.

62056-62  IEC:2002(E) – 5 –
This publication has been drafted in accordance with the ISO/IEC Dir
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