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IEC 62056-3-1
Edition 2.0 2021-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electricity metering data exchange – The DLMS/COSEM suite –
Part 3-1: Use of local area networks on twisted pair with carrier signalling
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IEC 62056-3-1
Edition 2.0 2021-07
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Electricity metering data exchange – The DLMS/COSEM suite –
Part 3-1: Use of local area networks on twisted pair with carrier signalling
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20; 35.110; 91.140.50 ISBN 978-2-8322-5174-4
– 2 – IEC 62056-3-1:2021 RLV © IEC 2021
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 9
3.1 Terms and definitions. 9
3.2 Abbreviated terms . 9
4 General description . 10
4.1 Basic vocabulary . 10
4.2 Profiles, layers and protocols . 11
4.3 Specification language . 12
4.4 Communication services for local bus data exchange without DLMS . 12
4.5 Communication services for local bus data exchange with DLMS . 21
4.6 Systems management . 22
5 Local bus data exchange without DLMS . 23
5.1 Physical layer . 23
5.2 Data Link layer . 35
5.3 Application layer . 43
6 Local bus data exchange with DLMS . 46
6.1 Physical layer . 46
6.2 Data Link layer . 47
6.3 Application layer . 56
7 Local bus data exchange with DLMS/COSEM . 56
7.1 Model . 56
7.2 Physical Layer . 56
7.3 Data Link layer . 68
7.4 Support Manager layer . 77
7.5 Transport Layer . 81
7.6 Application Layer . 85
8 Local bus data exchange – Hardware . 86
8.1 General . 86
8.2 General characteristics . 86
8.3 Bus specification . 91
8.4 Magnetic plug . 93
8.5 Functional specifications of Primary Station transmitter (for 50 kHz signal) . 95
8.6 Functional specifications of Primary Station receiver (for 50 kHz signal) . 96
8.7 Functional specification of Secondary Station transmitter (for 50 kHz signal) . 97
8.8 Functional specifications of Secondary Station receiver (for 50 kHz signal) . 98
9 Unidirectional local data transmission interface . 99
9.1 Introduction . 99
9.2 General description . 99
9.3 Historical TIC . 99
9.4 Standard TIC . 103
9.5 Unidirectional TIC Hardware . 104
Annex A (normative) Specification language . 111
A.1 Vocabulary and operating rules . 111
A.2 Entity and Entity Invocation . 112
Annex B (normative) Timing types and characteristics . 113
B.1 Timing type definition . 113
B.2 Timing measurements and characteristics. 114
Annex C (normative) List of fatal errors . 115
Annex D (normative) Coding the command code field of frames . 116
D.1 Command codes for local bus data exchange (Table D.1) . 116
D.2 Codes of commands for data exchange on the local bus with DLMS or
DLMS/COSEM . 116
Annex E (normative) Principle of the CRC . 118
E.1 General . 118
E.2 Operations on the polynomials . 118
E.3 Check procedure. 118
E.4 Operating parameters . 119
Annex F (normative) Random integer generation for response from forgotten stations . 120
F.1 General . 120
F.2 Criterion for a random integer . 120
F.3 Operating parameters . 120
Annex G (normative) Random number generation for authentication (profile without
DLMS) . 121
Annex H (normative) Systems management implementation . 122
Annex I (informative) Information about exchanges . 123
I.1 Non-energized station session (Figure I.1) . 123
I.2 Remote reading and programming exchanges (Figure I.2) . 124
I.3 Bus initialization frame (Figure I.3). 125
I.4 Forgotten station call exchange (Figure I.4) . 126
Bibliography . 127
Figure 1 – IEC 62056-3-1 communication profiles . 11
Figure 2 – Alarm mechanism . 21
Figure 3 – Exchanges in continuous operation . 25
Figure 4 – Alarm event without any communication in progress . 26
Figure 5 – Alarm event with a communication in progress . 26
Figure 6 – Signal envelope on the bus . 87
Figure 7 – Bus representation . 88
Figure 8 – Power supply characteristics . 88
Figure 9 – States associated to a session: for selected Secondary Station . 89
Figure 10 – States associated to a session: for non-selected Secondary Station. 89
Figure 11 – Simple and multiple Secondary stations . 90
Figure 12 – Equivalent diagram of the test equipment . 92
Figure 13 – Ferrite pot and bobbin . 93
Figure 14 – Associated components of the magnetic plug . 94
Figure 15 – Associated components of the energy supply plug . 95
Figure 16 – Character transmission . 100
Figure 17 – Historical TIC: information group structure . 101
Figure 18 – Standard TIC: Application information group structure . 103
– 4 – IEC 62056-3-1:2021 RLV © IEC 2021
Figure 19 – Standard TIC: Timestamped information group structure . 103
Figure 20 – Equivalent diagram of the test equipment . 107
Figure 21 – Signal envelope on the bus . 108
Figure B.1 – Logical timing type . 113
Figure B.2 – Physical timing type . 113
Figure B.3 – Results processing for timing defined with low and high limits . 114
Figure B.4 – Results processing for timing defined by a nominal value . 114
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