IEC PAS 62026-7:2009

IEC/PAS 62026-7 ®
Edition 1.0 2009-08
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside
Low-voltage switchgear and controlgear – Controller-Device Interfaces (CDIs) –
Part 7: CompoNet
IEC/PAS 62026-2:2009(E)
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.

IEC Central Office
3, rue de Varembé
CH-1211 Geneva 20
Switzerland
Email: inmail@iec.ch
Web: www.iec.ch
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.
ƒ Catalogue of IEC publications: www.iec.ch/searchpub
The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…).
It also gives information on projects, withdrawn and replaced publications.
ƒ IEC Just Published: www.iec.ch/online_news/justpub
Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available
on-line and also by email.
ƒ Electropedia: www.electropedia.org
The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions
in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical
Vocabulary online.
ƒ Customer Service Centre: www.iec.ch/webstore/custserv
If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service
Centre FAQ or contact us:
Email: csc@iec.ch
Tel.: +41 22 919 02 11
Fax: +41 22 919 03 00
IEC/PAS 62026-7 ®
Edition 1.0 2009-08
PUBLICLY AVAILABLE
SPECIFICATION
PRE-STANDARD
colour
inside
Low-voltage switchgear and controlgear – Controller-Device Interfaces (CDIs) –
Part 7: CompoNet
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XH
ICS 29.130.20, 33.200 ISBN 978-2-88910-808-4
– 2 – PAS 62026-7 © IEC:2009(E)

CONTENTS
FOREWORD.12

INTRODUCTION.14

1 Scope.16

2 Normative references .16

3 Terms, definitions, symbols, abbreviated terms and conventions .17

3.1 Terms and definitions .17
3.2 Symbols and abbreviated terms.20
4 Classification.20
4.1 General .20
4.2 Network specifications.22
4.3 Components .23
4.4 CompoNet communication model .24
4.5 CompoNet and CIP .24
5 Characteristics .24
5.1 Communication cycle .24
5.1.1 General .24
5.1.2 Time domains .24
5.1.3 A typical communication cycle .25
5.2 Messaging protocol .25
5.2.1 Message frame format .25
5.2.2 Message frame types .28
5.2.3 Explicit messaging.50
5.2.4 Explicit messaging client/server timing requirement.61
5.3 CompoNet communication object classes.62
5.3.1 General .62
5.3.2 Identity object class definition (class ID code: 01 ) .62
Hex
5.3.3 Message router object class definition (class ID code: 02 ).62
Hex
5.3.4 Connection object class definition (class ID code: 05 ) .62
Hex
5.3.5 CompoNet Link object class definition (class ID code: F7 ) .72
Hex
5.3.6 CompoNet Repeater object (class ID code: F8 ) .79
Hex
5.4 Network access state machine .81
5.4.1 General .81
5.4.2 Network access events .81
5.4.3 State transition diagram.82
5.4.4 Data rate auto-detection .84
5.4.5 Duplicate MAC ID detection.85
5.4.6 Repeater behaviour .86
5.5 I/O connection.87
5.6 TDMA.87
5.6.1 General .87
5.6.2 Data link timing features .88
5.6.3 Calculation of Time Domain.91
5.7 Physical layer.97

PAS 62026-7 © IEC:2009(E) – 3 –

5.7.1 General .97

5.7.2 Physical signalling .97

5.7.3 Master port requirements.97

5.7.4 Slave port requirements.100

5.7.5 Receiving signal requirements for master and slave ports . 103

5.7.6 Requirements for digital processing. 105

5.7.7 Recommended circuits and component parameters .108

5.7.8 Isolation .114

5.7.9 Transmission medium.115

5.7.10 Topology .116

5.7.11 Link power.121
5.7.12 Repeater implementation.125
6 Product information .125
7 Normal service, mounting and transport conditions. 126
7.1 Normal service conditions .126
7.1.1 General .126
7.1.2 Ambient air temperature .126
7.1.3 Altitude.126
7.1.4 Climatic conditions .126
7.2 Conditions during transport and storage . 126
7.3 Mounting .126
8 Constructional and performance requirements. 127
8.1 Indicators and configuration switches .127
8.1.1 Status indicators.127
8.1.2 Switches.128
8.1.3 CompoNet marking.129
8.2 CompoNet cable.131
8.2.1 Overview .131
8.2.2 Cable profile template.131
8.2.3 Round cable I profile .132
8.2.4 Round cable II profile .134
8.2.5 Flat cable I profile.136
8.2.6 Flat cable II profile.138
8.3 Terminators.140
8.3.1 General .140

8.3.2 Terminating resistors .140
8.3.3 Terminating capacitors .140
8.4 Connectors.140
8.4.1 General .140
8.4.2 Template .141
8.4.3 Engaging specification for connector profiles: open, flat I, flat II . 142
8.4.4 Specifications of hooks for connector profiles: open, flat I, flat II. 144
8.4.5 Open connector profile .146
8.4.6 Profile of flat connector I .150
8.4.7 Profile of flat connector II .155
8.4.8 Profile of sealed M12 connector . 158
8.5 Node power supply implementation .159
8.5.1 General .159
8.5.2 Requirement for node power supply connection.159

– 4 – PAS 62026-7 © IEC:2009(E)

8.5.3 Requirements for nodes powered by network power supplies . 160

8.6 Miswiring protection .161

9 Tests .161

9.1 General .161

9.2 Electrical testing.161

9.2.1 Slave port operation voltage test .161

9.2.2 Reverse connected power supply line.162

9.2.3 Momentary power interruption . 163

9.2.4 Isolation .163

9.2.5 Input impedance .164
9.2.6 Output waveform .164
9.2.7 Minimum input waveform .165
9.2.8 Electromagnetic compatibility testing .166
9.3 Mechanical test .167
9.4 Logical test.167
9.4.1 General .167
9.4.2 Term definitions.167
9.4.3 Test of slaves and repeaters .168
9.4.4 Test of master .171
Annex A (normative) CompoNet common services.174
Annex B (normative) CompoNet error codes .175
Annex C (normative) Connection path attribute definition.176
Annex D (normative) Data type specification and encoding .177
Annex E (normative) Communication objects library .181
Annex F (normative) Value ranges.182
Annex G (normative) CN default time domain .183
Bibliography.187

Figure 1 – Segment layer.21
Figure 2 – CompoNet components .23
Figure 3 – Time domains .25
Figure 4 – A typical communication cycle.25
Figure 5 – A general frame .26

Figure 6 – Preamble of frames.26
Figure 7 – Transmission direction .27
Figure 8 – Transmission direction .27
Figure 9 – OUT frame format .28
Figure 10 – OUT command code.29
Figure 11 – TRG frame format .30
Figure 12 – TRG command code.31
Figure 13 – CN frame format.31
Figure 14 – CN command code.31
Figure 15 – IN frame format .33
Figure 16 – IN command code .33
Figure 17 – A_EVENT frame format.34

PAS 62026-7 © IEC:2009(E) – 5 –

Figure 18 – A_EVENT command code .35

Figure 19 – B_EVENT frame format.36

Figure 20 – B_EVENT command code meanings .36

Figure 21 – B_EVENT message format.37

Figure 22 – E_CMD block .38

Figure 23 – Group block .38

Figure 24 – Item block .39

Figure 25 – Status Read (STR Response) event data .41

Figure 26 – Configuration event data (STW Request) .43
Figure 27 – Poll data.44
Figure 28 – B_EVENT general decoding phase.45
Figure 29 – Flow chart for processing a matched STW request.48
Figure 30 – BEACON frame format .49
Figure 31 – BEACON command code .49
Figure 32 – Object diagram of A_Event message flow .51
Figure 33 – A_EVENT message format.51
Figure 34 – Compact message type request format (non-fragmented frame/first
fragment frame) .52
Figure 35 – Expanded message type request format (non-fragmented frame/first
fragment frame) .52
Figure 36 – Compact/Expanded message successful response format (unfragmented
frame/first fragment frame) .53
Figure 37 – Compact/Expanded message unsuccessful response format
(unfragmented frame/first fragment frame).53
Figure 38 – Compact/Expanded message request format for fragments .53
Figure 39 – Compact/Expanded message response format for fragments .54
Figure 40 – Service data format .54
Figure 41 – Predefined master/slave I/O connection state transition diagram.68
Figure 42 – Predefined master/slave I/O connection state transition diagram.70
Figure 43 – Connection flow .71
Figure 44 – Allocate request service data .77
Figure 45 – Allocate response service data.78

Figure 46 – Release request service data .78
Figure 47 – Reset service parameter .80
Figure 48 – State transition diagram .83
Figure 49 – Sub-state of non-participated state.84
Figure 50 – Sub-state of participated state.84
Figure 51 – Data rate detection diagram .85
Figure 52 – BEACON changed by repeaters .87
Figure 53 – Multicast I/O connections .87
Figure 54 – Master MAC and Phy. circuit diagram.88
Figure 55 – Slave MAC and Phy. circuit diagram .89
Figure 56 – Repeater MAC and Phy. circuit diagram .89
Figure 57 – Transmission process .91

– 6 – PAS 62026-7 © IEC:2009(E)

Figure 58 – Transmission cycle model .92

Figure 59 – CnDefaultTimeDomain cycle model .93

Figure 60 – Master event communication model .95

Figure 61 – Slave event communication model .96

Figure 62 – Manchester encoding (inverted) .97

Figure 63 – Master port transmit mask .99

Figure 64 – Output waveform test circuit for master or slave port.100

Figure 65 – Slave port transmit mask.102

Figure 66 – Receive mask 1.104
Figure 67 – Receive mask 2.104
Figure 68 – Receive mask 3.105
Figure 69 – PHY/MAC interface diagram.105
Figure 70 – Digital receive mask 1 .106
Figure 71 – Digital receive mask 2 .106
Figure 72 – Digital receive mask 3 .107
Figure 73 – Logical transmit mask .108
Figure 74 – Recommended circuit for a master port .109
Figure 75 – Recommended circuit for a slave port .110
Figure 76 – Transformer symbol .111
Figure 77 – Driver voltage measurement circuit . 113
Figure 78 – Propagation delay test circuit .113
Figure 79 – An isolation example of a master port . 114
Figure 80 – An isolation example of an I/O module with connectivity to other power
sources.114
Figure 81 – An isolation example of a simple slave that requires connection to devices
with ungrounded signal wiring.115
Figure 82 – An isolation example of a non-network powered slave. 115
Figure 83 – Media topology.116
Figure 84 – Position of a terminator .117
Figure 85 – Number of devices per segment . 117
Figure 86 – Cable length limitation Illustration.118
Figure 87 – Branch restriction .119
Figure 88 – Wiring selection .119
Figure 89 – General wiring method .120
Figure 90 – Flexible wiring method .121
Figure 91 – Power dispatching method .123
Figure 92 – Network segment powered by the master .123
Figure 93 – Connection with power supply .123
Figure 94 – Network segments powered by repeaters .124
Figure 95 – A simplified diagram for a repeater.125
Figure 96 – Outline of round cable II .136
Figure 97 – Outline of flat cable I .137
Figure 98 – Dimension of flat cable I.138
Figure 99 – Outline of flat cable II .139

PAS 62026-7 © IEC:2009(E) – 7 –

Figure 100 – Dimension of flat cable II .140

Figure 101 – Engaging dimensions of plug connector .142

Figure 102 – Contact space for plug connector .143

Figure 103 – Engaging dimensions of jack connector.144

Figure 104 – Connector hook.145

Figure 105 – Open connecter plug (informative).147

Figure 106 – Open connecter jack (informative) .148

Figure 107 – Method to measure contact resistance (open connectors) . 149

Figure 108 – De-rating current for connectors .149
Figure 109 – Flat connector I plug .152
Figure 110 – Flat connector I jack (informative) .153
Figure 111 – Method to measure contact resistance (flat I, II connectors) . 154
Figure 112 – Flat connector II plug (informative) .156
Figure 113 – Flat connector II jack (informative) .157
Figure 114 – Marking connector for trunk lines.157
Figure 115 – M12 connecter pinout .159
Figure 116 – Link power circuits .159
Figure 117 – Power-drop along a cable.160
Figure 118 – Power design for a node (informative) .161
Figure 119 – Operating voltage test circuit.162
Figure 120 – Reverse connected power supply line .162
Figure 121 – Isolation .163
Figure 122 – Input impedance.164
Figure 123 – Output slave test circuit for slave port .165
Figure 124 – Minimum input waveform test circuit.165
Figure 125 – Minimum input waveform test system .166
Figure 126 – Data link test for slave and repeater DUT .168
Figure 127 – Test configuration for minimum traffic of master DUT .171
Figure 128 – Test configuration for proxy of master DUT .173
Figure D.1 – An example to generate CRC .180

Table 1 – Network specifications.22
Table 2 – OSI reference model and CompoNet .24
Table 3 – Command codes .26
Table 4 – Command restrictions for slave MAC.28
Table 5 – Block name description .29
Table 6 – CN target .29
Table 7 – I/O refresh.29
Table 8 – Block name description .30
Table 9 – Block name description .31
Table 10 – Duplication checking function status.32
Table 11 – A_EVENT sending request .32
Table 12 – Status of CN frames .32

– 8 – PAS 62026-7 © IEC:2009(E)

Table 13 – Warning bit of CN frames .32

Table 14 – Alarm bit of CN frames .33

Table 15 – Block name description .33

Table 16 – Encoded length .34

Table 17 – Block name description .34

Table 18 – Acknowledgement bit of A_EVENT .35

Table 19 – Command type of A_EVENT.35

Table 20 – Block name description .36

Table 21 – Acknowledgement bit of B_EVENT .37
Table 22 – Command type of B_EVENT.37
Table 23 – E_CMD block meanings .38
Table 24 – Group block meanings.39
Table 25 – Item block meanings .39
Table 26 – Processing rules for a STR request .46
Table 27 – Processing rules for an A_EVENT poll request .46
Table 28 – Processing rules for a STW request .47
Table 29 – STW request commands.48
Table 30 – Block name description .49
Table 31 – Control code of BEACON frames.49
Table 32 – Speed Code of BEACON frames .50
Table 33 – Control code format.54
Table 34 – A Data encoding example.56
Table 35 – Fragment type values .57
Table 36 – Fragmented transmission .58
Table 37 – Fragmented reception .59
Table 38 – Explicit message timeout values.61
Table 39 – Maximum value of expected packet rate .63
Table 40 – CompoNet connection object attribute access rules.64
Table 41 – CompoNet Link object specific additional error codes.66
Table 42 – Connection instance ID for predefined master/slave connections.67
Table 43 – Default multicast poll connection object attribute values .67

Table 44 – Predefined master/slave I/O connection state event matrix.69
Table 45 – CompoNet Link class attributes .72
Table 46 – CompoNet Link class services.72
Table 47 – CompoNet Link instance attributes .73
Table 48 – MAC ID range .74
Table 49 – Data rate .74
Table 50 – Allocation choice .74
Table 51 – Data rate switch value .75
Table 52 – Bit definitions for node state octet .75
Table 53 – Bit definitions for node network state.76
Table 54 – CompoNet Link object common services .76
Table 55 – CompoNet Link Object class specific services .76

PAS 62026-7 © IEC:2009(E) – 9 –

Table 56 – Allocation choice octet contents .77

Table 57 – EPR value .77

Table 58 – Explicit message timer .77

Table 59 – Release master/slave connection set request parameters .78

Table 60 – Release choice octet contents .78

Table 61 – Repeater class attribute .79

Table 62 – Repeater class services .79

Table 63 – Instance attributes of repeater class.79

Table 64 – Repeater common service .80
Table 65 – Reset attributes.80
Table 66 – Data rate and network watchdog time periods .82
Table 67 – Description of the state machine .83
Table 68 – Duplicate MAC ID detection mechanism .86
Table 69 – Repeating directions of frames .86
Table 70 – Master timing features.88
Table 71 – Slave timing features.89
Table 72 – Repeater timing features .90
Table 73 – Cable propagation delay.90
Table 74 – Maximum cable length.90
Table 75 – Parameters in TimeDomain calculation.91
Table 76 – Frame marks .92
Table 77 – TimeDomain settings for nodes at first segment layer.93
nd
Table 78 – TimeDomain settings for nodes at 2 and 3rd segment layers .93
Table 79 – Repeater delay for CnDefaultTimeDomain calculation .94
Table 80 – Parameters for CnDefaultTimeDomain calculation .94
Table 81 – First segment layer settings.95
nd
rd
Table 82 – Settings for 2 and 3 segment layers.95
Table 83 – Parameters for Event Time Domain calculations.96
Table 84 – CompoNet Manchester encoding .97
Table 85 – Allowable connectors for the master port.98
Table 86 – Master port impedance during receive .98

Table 87 – Master port impedance during transmit.98
Table 88 – Master port transmit specifications for data rate of 4 Mbit/s; 3 Mbit/s and
1,5 Mbit/s.99
Table 89 – Master port transmit specifications for data rate of 93,75 kbit/s . 100
Table 90 – Allowable connectors for permanently attached cables . 101
Table 91 – Allowable connectors for the slave port .101
Table 92 – Slave port impedance during receive. 101
Table 93 – Slave port impedance during transmit.102
Table 94 – Slave port transmit specifications for data rate of 4 Mbit/s; 3 Mbit/
...