EN 61158-4-2:2008

SLOVENSKI STANDARD
01-junij-2008
1DGRPHãþD
SIST EN 61158-4:2004
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-2. del:
Specifikacija protokola na nivoju podatkovnih povezav - Elementi tipa 2 (IEC 61158
-4-2:2007)
Industrial communication networks - Fieldbus specifications -- Part 4-2: Data-link layer
protocol specification - Type 2 elements
Industrielle Kommunikationsnetze - Feldbusse - Teil 4-2: Protokollspezifikation des Data
Link Layer (Sicherungsschicht) - Typ 2-Elemente
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-2:
Spécification des protocoles des couches de liaison de données - Eléments de type 2
Ta slovenski standard je istoveten z: EN 61158-4-2:2008
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.100.20 Podatkovni povezovalni sloj Data link layer
35.110 Omreževanje Networking
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61158-4-2
NORME EUROPÉENNE
February 2008
EUROPÄISCHE NORM
ICS 35.100.20; 25.040.40 Partially supersedes EN 61158-4:2004

English version
Industrial communication networks -
Fieldbus specifications -
Part 4-2: Data-link layer protocol specification -
Type 2 elements
(IEC 61158-4-2:2007)
Réseaux de communication industriels -  Industrielle Kommunikationsnetze -
Spécifications des bus de terrain - Feldbusse -
Partie 4-2: Spécification des protocoles Teil 4-2: Protokollspezifikation des
des couches de liaison de données - Data Link Layer (Sicherungsschicht) -
Eléments de type 2 Typ 2-Elemente
(CEI 61158-4-2:2007) (IEC 61158-4-2:2007)

This European Standard was approved by CENELEC on 2008-02-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61158-4-2:2008 E
Foreword
The text of document 65C/474/FDIS, future edition 1 of IEC 61158-4-2, prepared by SC 65C, Industrial
networks, of IEC TC 65, Industrial-process measurement, control and automation, was submitted to the
IEC-CENELEC parallel vote and was approved by CENELEC as EN 61158-4-2 on 2008-02-01.
This and the other parts of the EN 61158-4 series supersede EN 61158-4:2004.
With respect to EN 61158-4:2004 the following changes were made:
– deletion of Type 6 fieldbus, and the placeholder for a Type 5 fieldbus data-link layer, for lack of market
relevance;
– addition of new fieldbus types;
– partition into multiple parts numbered 4-1, 4-2, …, 4-19.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-02-01
NOTE  Use of some of the associated protocol types is restricted by their intellectual-property-right holders. In all cases, the
commitment to limited release of intellectual-property-rights made by the holders of those rights permits a particular data-link layer
protocol type to be used with physical layer and application layer protocols in type combinations as specified explicitly in the
EN 61784 series. Use of the various protocol types in other combinations may require permission from their respective
intellectual-property-right holders.
IEC and CENELEC draw attention to the fact that it is claimed that compliance with this standard may involve the use of patents as
follows, where the [xx] notation indicates the holder of the patent right:
Type 2 and possibly other types:
US 5,400,331 [RA] Communication network interface with screeners for incoming messages
US 5,471,461 [RA] Digital communication network with a moderator station election process
US 5,491,531 [RA] Media access controller with a shared class message delivery capability
US 5,493,571 [RA] Apparatus and method for digital communications with improved delimiter detection
US 5,537,549 [RA] Communication network with time coordinated station activity by time slot and periodic
interval number
US 5,553,095 [RA] Method and apparatus for exchanging different classes of data during different time
Intervals
IEC and CENELEC take no position concerning the evidence, validity and scope of these patent rights.
The holders of these patent rights have assured IEC that they are willing to negotiate licences under reasonable and non-
discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the holders of these
patent rights are registered with IEC. Information may be obtained from:
[RA]: Rockwell Automation, Inc.
1201 S. Second Street
Milwaukee, WI 53204
USA
Attention: Intellectual Property Dept.
Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights other than those
identified above. IEC and CENELEC shall not be held responsible for identifying any or all such patent rights.
Annex ZA has been added by CENELEC.
__________
- 3 - EN 61158-4-2:2008
Endorsement notice
The text of the International Standard IEC 61158-4-2:2007 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 61784-1 NOTE  Harmonized as EN 61784-1:2008 (not modified).
IEC 61784-2 NOTE  Harmonized as EN 61784-2:2008 (not modified).
ISO 9314-2 NOTE  Harmonized as EN 29314-2:1993 (not modified).
__________
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1) 2)
IEC 61131-3 - Programmable controllers - EN 61131-3 2003
Part 3: Programming languages
IEC 61158-2 2007 Industrial communication networks - EN 61158-2 2008
Fieldbus specifications -
Part 2: Physical layer specification and service
definition
1) 2)
IEC 61158-3-2 - Industrial communication networks - EN 61158-3-2 2008
Fieldbus specifications -
Part 3-2: Data-link layer service definition -
Type 2 elements
1) 2)
IEC 61158-5-2 - Industrial communication networks - EN 61158-5-2 2008
Fieldbus specifications -
Part 5-2: Application layer service definition -
Type 2 elements
1) 2)
IEC 61158-6-2 - Industrial communication networks - EN 61158-6-2 2008
Fieldbus specifications -
Part 6-2: Application layer protocol
specification - Type 2 elements

1) 2)
IEC 61784-3-2 - Industrial communication networks - Profiles - EN 61784-3-2 2008
Part 3-2: Functional safety fieldbuses -
Additional specifications for CPF 2

1)
IEC 62026-3 - Low-voltage switchgear and controlgear - - -
Controller-device interfaces (CDIs) -
Part 3: DeviceNet
1)
ISO/IEC 3309 - Information technology - Telecommunications - -
and information exchange between systems -
High-level data link control (HDLC)
procedures - Frame structure
1) 2)
ISO/IEC 7498-1 - Information technology - Open Systems EN ISO/IEC 7498-1 1995
Interconnection - Basic Reference Model:
The Basic Model
1)
ISO/IEC 7498-3 - Information technology - Open Systems - -
Interconnection - Basic Reference Model:
Naming and addressing
1)
Undated reference.
2)
Valid edition at date of issue.

- 5 - EN 61158-4-2:2008
Publication Year Title EN/HD Year
1)
ISO/IEC 8802-3 - Information technology - Telecommunications - -
and information exchange between systems -
Local and metropolitan area networks -
Specific requirements -
Part 3: Carrier sense multiple access with
collision detection (CSMA/CD) access method
and physical layer specifications

1)
ISO/IEC 10731 - Information technology - Open Systems - -
Interconnection - Basic reference model -
Conventions for the definition of OSI services

1)
ISO 11898 - Road vehicles - Interchange of digital - -
information - Controller area network (CAN)
for high-speed communication
IEC 61158-4-2
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 4-2: Data-link layer protocol specification – Type 2 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XK
ICS 35.100.20; 25.040.40 ISBN 2-8318-9428-X

– 2 – 61158-4-2 © IEC:2007(E)
CONTENTS
FOREWORD.7
INTRODUCTION.9
1 Scope.10
1.1 General .10
1.2 Specifications.10
1.3 Procedures.10
1.4 Applicability.11
1.5 Conformance.11
2 Normative references .11
3 Terms, definitions, symbols and abbreviations.12
3.1 Reference model terms and definitions.12
3.2 Service convention terms and definitions.14
3.3 Common terms and definitions .15
3.4 Additional Type 2 definitions.16
3.5 Type 2 symbols and abbreviations.23
4 Overview of the DL-protocol .24
4.1 General .24
4.2 Services provided by the DL.26
4.3 Structure and definition of DL-addresses.27
4.4 Services assumed from the PhL .29
4.5 Functional classes.31
5 General structure and encoding of PhIDUs and DLPDUs and related elements of
procedure.32
5.1 Overview .32
5.2 Media access procedure.32
5.3 DLPDU structure and encoding .35
5.4 Lpacket components .39
5.5 DLPDU procedures .41
5.6 Summary of DLL support services and objects .42
6 Specific DLPDU structure, encoding and procedures.44
6.1 Modeling language .44
6.2 DLS user services .46
6.3 Generic tag Lpacket .52
6.4 Moderator Lpacket .53
6.5 Time distribution Lpacket .54
6.6 UCMM Lpacket.57
6.7 Keeper UCMM Lpacket.57
6.8 TUI Lpacket.58
6.9 Link parameters Lpacket and tMinus Lpacket .59
6.10 I’m-alive Lpacket .60
6.11 Ping Lpackets.62
6.12 WAMI Lpacket .64
6.13 Debug Lpacket .64
6.14 IP Lpacket .65
6.15 Ethernet Lpacket .65
7 Objects for station management .65

61158-4-2 © IEC:2007(E) – 3 –
7.1 General .65
7.2 ControlNet object .66
7.3 Keeper object.76
7.4 Scheduling object.98
7.5 TCP/IP Interface object .109
7.6 Ethernet link object.118
7.7 DeviceNet object .124
7.8 Connection configuration object (CCO).132
8 Other DLE elements of procedure. 152
8.1 Network attachment monitor (NAM) .152
8.2 Calculating link parameters .159
9 Detailed specification of DL components .167
9.1 General .167
9.2 Access control machine (ACM).167
9.3 TxLLC .184
9.4 RxLLC .188
9.5 Transmit machine (TxM).191
9.6 Receive machine (RxM) .194
9.7 Serializer.200
9.8 Deserializer .201
9.9 DLL management .202
Annex A (normative) Indicators and switches.205
A.1 Purpose .205
A.2 Indicators .205
A.3 Switches .216
Bibliography.218
INDEX .219

Figure 1 – Relationships of DLSAPs, DLSAP-addresses and group DL-addresses .15
Figure 2 – Data-link layer internal architecture.25
Figure 3 – Basic structure of a MAC ID address.27
Figure 4 – Basic structure of a generic tag address .27
Figure 5 – Basic structure of a fixed tag address .28
Figure 6 – M_symbols and Manchester encoding at 5 MHz (informative) .29
Figure 7 – NUT structure .33
Figure 8 – Media access during scheduled time.33
Figure 9 – Media access during unscheduled time .34
Figure 10 – DLPDU format.35
Figure 11 – Aborting a DLPDU during transmission .39
Figure 12 – Lpacket format .39
Figure 13 – Generic tag Lpacket format .40
Figure 14 – Fixed tag Lpacket format.41
Figure 15 – Goodness parameter of TimeDist_Lpacket .55
Figure 16 – Example I’m alive processing algorithm.62
Figure 17 – Keeper CRC algorithm .82
Figure 18 – Keeper object power-up state diagram .94

– 4 – 61158-4-2 © IEC:2007(E)
Figure 19 – Keeper object operating state diagram .95
Figure 20 – Synchronized network change processing .98
Figure 21 – State transition diagram for TCP/IP Interface object .118
Figure 22 – Connection configuration object edit flowchart. 152
Figure 23 – NAM state machine .153
Figure A.1 – Non redundant network status indicator labeling . 209
Figure A.2 – Redundant network status indicator labeling . 210

Table 1 – Data-link layer components .24
Table 2 – MAC ID addresses allocation .27
Table 3 – Fixed tag service definitions .28
Table 4 – Data encoding rules .29
Table 5 – M Data symbols .30
Table 6 – Truth table for ph_status_indication.31
Table 7 – FCS length, polynomials and constants .37
Table 8 – DLL support services and objects.43
Table 9 – Elementary data types.46
Table 10 – DLL events.51
Table 11 – Time distribution priority .56
Table 12 – Format of the TUI Lpacket .58
Table 13 – ControlNet object class attributes .67
Table 14 – ControlNet object instance attributes .67
Table 15 – TUI status flag bits .71
Table 16 – Channel state bits .72
Table 17 – ControlNet object common services.74
Table 18 – ControlNet object class specific services .75
Table 19 – Keeper object revision history .77
Table 20 – Keeper object class attributes .77
Table 21 – Keeper object instance attributes .77
Table 22 – Keeper operating state definitions .80
Table 23 – Port status flag bit definitions .80
Table 24 – TUI status flag bits .81
Table 25 – Keeper attributes.84
Table 26 – Memory requirements (in octets) for the Keeper attributes.84
Table 27 – Keeper object common services .85
Table 28 – Keeper object class specific services .86
Table 29 – Service error codes .87
Table 30 – Wire order format of the TUI Lpacket.91
Table 31 – Service error codes .92
Table 32 – Keeper object operating states .92
Table 33 – Keeper object state event matrix .96
Table 34 – Scheduling object class attributes .99
Table 35 – Scheduling object instance attributes .100

61158-4-2 © IEC:2007(E) – 5 –
Table 36 – Scheduling object common services . 100
Table 37 – Status error descriptions for Create.101
Table 38 – Status error descriptions for Delete and Kick_Timer .102
Table 39 – Scheduling object class specific services . 102
Table 40 – Status error descriptions for Read .104
Table 41 – Status error descriptions for Conditional_Write.105
Table 42 – Status error descriptions for Forced_Write . 105
Table 43 – Status error descriptions for Change_Start .106
Table 44 – Status error descriptions for Break_Connections . 106
Table 45 – Status error descriptions for Change_Complete. 107
Table 46 – Status error descriptions for Restart_Connections .108
Table 47 – TCP/IP Interface object class attributes.109
Table 48 – TCP/IP Interface object instance attributes. 110
Table 49 – Status bits .112
Table 50 – Configuration capability bits .112
Table 51 – Configuration control bits.113
Table 52 – Example path .113
Table 53 – Interface configuration components .114
Table 54 – Alloc control values .115
Table 55 – TCP/IP Interface object common services .116
Table 56 – Get_Attribute_All reply format .117
Table 57 – Ethernet link object revision history .118
Table 58 – Ethernet link object class attributes .119
Table 59 – Ethernet link object instance attributes . 119
Table 60 – Interface flags bits.121
Table 61 – Control bits.123
Table 62 – Ethernet Link object common services. 123
Table 63 – Ethernet Link object class specific services .124
Table 64 – DeviceNet object revision history.124
Table 65 – DeviceNet object class attributes.125
Table 66 – DeviceNet object instance attributes.125
Table 67 – Bit rate attribute values .127
Table 68 – BOI attribute values.128
Table 69 – Diagnostic counters bit description .129
Table 70 – DeviceNet object common services .130
Table 71 – Reset service parameter .130
Table 72 – Reset service parameter values .131
Table 73 – DeviceNet object class specific services. 131
Table 74 – Connection configuration object revision history .132
Table 75 – Connection configuration object class attributes . 132
Table 76 – Format number values.134
Table 77 – Connection configuration object instance attributes . 135
Table 78 – Originator connection status values.137

– 6 – 61158-4-2 © IEC:2007(E)
Table 79 – Target connection status values .138
Table 80 – Connection flags .138
Table 81 – I/O mapping formats .140
Table 82 – Connection configuration object common services. 141
Table 83 – Get_Attribute_All error codes .141
Table 84 – Get_Attribute_All response.142
Table 85 – Set_Attribute_All error codes.143
Table 86 – Set_Attribute_All request.144
Table 87 – Create request parameters.145
Table 88 – Create error codes .146
Table 89 – Delete error codes.146
Table 90 – Restore error codes.146
Table 91 – Connection configuration object class specific services . 147
Table 92 – Kick_Timer error codes .147
Table 93 – Open_Connection error codes .148
Table 94 – Close_Connection error codes .148
Table 95 – Stop_Connection error codes .148
Table 96 – Change_Start error codes .149
Table 97 – Get_Status service parameter .149
Table 98 – Get_Status service response.149
Table 99 – Get_Status service error codes .150
Table 100 – Change_Complete service parameter . 150
Table 101 – Change_Complete service error codes . 150
Table 102 – Audit_Changes service parameter .151
Table 103 – Audit_Changes service error codes . 151
Table 104 – NAM states.153
Table 105 – Default link parameters.154
Table 106 – PhL timing characteristics.160
Table A.1 – Module status indicator .206
Table A.2 – Network status indicators .207
Table A.3 – Network status indicator.211
Table A.4 – Network status indicator.213
Table A.5 – Combined module/network status indicator . 214
Table A.6 – I/O status indicator.215
Table A.7 – Bit rate switch encoding .217

61158-4-2 © IEC:2007(E) – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 4-2: Data-link layer protocol specification – Type 2 elements

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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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.
NOTE  Use of some of the associated protocol types is restricted by their intellectual-property-right holders. In all
cases, the commitment to limited release of intellectual-property-rights made by the holders of those rights permits
a particular data-link layer protocol type to be used with physical layer and application layer protocols in Type
combinations as specified explicitly in the IEC 61784 series. Use of the various protocol types in other
combinations may require permission from their respective intellectual-property-right holders.
IEC draws attention to the fact that it is claimed that compliance with this standard may involve the use of patents
as follows, where the [xx] notation indicates the holder of the patent right:
Type 2 and possibly other types:
US 5,400,331 [RA] Communication network interface with screeners for incoming messages
US 5,471,461 [RA] Digital communication network with a moderator station election process
US 5,491,531 [RA] Media access controller with a shared class message delivery capability
US 5,493,571 [RA] Apparatus and method for digital communications with improved delimiter
detection
US 5,537,549 [RA] Communication network with time coordinated station activity by time slot and
periodic interval number
US 5,553,095 [RA] Method and apparatus for exchanging different classes of data during different
time Intervals
IEC takes no position concerning the evidence, validity and scope of these patent rights.

– 8 – 61158-4-2 © IEC:2007(E)
The holders of these patent rights have assured IEC that they are willing to negotiate licences under reasonable
and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of
the holders of these patent rights are registered with IEC. Information may be obtained from
[RA]: Rockwell Automation, Inc.
1201 S. Second Street
Milwaukee, WI 53204
USA
Attention: Intellectual Property Dept.
Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights
other than those identified above. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61158-4-2 has been prepared by subcommittee 65C: Industrial
networks, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This first edition and its companion parts of the IEC 61158-4 subseries cancel and replace
IEC 61158-4:2003. This edition of this part constitutes a minor revision. This part and its
companion Type 2 parts also cancel and replace IEC PAS 62413, published in 2005.
This edition of IEC 61158-4 includes the following significant changes from the previous
edition:
a) deletion of the former Type 6 fieldbus, and the placeholder for a Type 5 fieldbus data link
layer, for lack of market relevance;
b) addition of new types of fieldbuses;
c) division of this part into multiple parts numbered -4-1, -4-2, …, -4-19.
The text of this standard is based on the following documents:
FDIS Report on voting
65C/474/FDIS 65C/485/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 ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site 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.
NOTE  The revision of this standard will be synchronized with the other parts of the IEC 61158 series.
The list of all the parts of the IEC 61158 series, under the general title Industrial
communication networks – Fieldbus specifications, can be found on the IEC web site.

61158-4-2 © IEC:2007(E) – 9 –
INTRODUCTION
This part of IEC 61158 is one of a series produced to facilitate the interconnection of
automation system components. It is related to other standards in the set as defined by the
“three-layer” fieldbus reference model described in IEC/TR 61158-1.
The data-link protocol provides the data-link service by making use of the services available
from the physical layer. The primary aim of this standard is to provide a set of rules for
communication expressed in terms of the procedures to be carried out by peer data-link
entities (DLEs) at the time of communication. Th
...