IEC 61158-4-11:2014

IEC 61158-4-11 ®
Edition 3.0 2014-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –
Part 4-11: Data-link layer protocol specification – Type 11 elements

Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 4-11: Spécification du protocole de la couche liaison de données –
Eléments de type 11
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IEC 61158-4-11 ®
Edition 3.0 2014-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Industrial communication networks – Fieldbus specifications –

Part 4-11: Data-link layer protocol specification – Type 11 elements

Réseaux de communication industriels – Spécifications des bus de terrain –

Partie 4-11: Spécification du protocole de la couche liaison de données –

Eléments de type 11
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XH
ICS 25.040.40; 35.100.20; 35.110 ISBN 978-2-8322-1723-8

– 2 – IEC 61158-4-11:2014 © IEC 2014
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
1 Scope . 11
1.1 General . 11
1.2 Specifications . 11
1.3 Procedures . 11
1.4 Applicability . 12
1.5 Conformance . 12
2 Normative references . 12
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 Terms and definitions . 15
3.4 Symbols and abbreviations . 19
4 Overview of the DL-protocol . 20
4.1 General . 20
4.2 Overview of the medium access control . 21
4.3 Service assumed from the PhL . 22
4.4 DLL architecture . 23
4.5 Access control machine and schedule support functions . 27
4.6 Local parameters, variables, counters, timers and queues . 28
5 General structure and encoding of PhIDU and DLPDU and related elements of
procedure . 47
5.1 Overview . 47
5.2 PhIDU structure and encoding . 47
5.3 Common MAC frame structure, encoding and elements of procedure . 48
5.4 Elements of the MAC frame . 48
5.5 Order of bit transmission . 53
5.6 Invalid DLPDU . 53
6 DLPDU-specific structure, encoding and elements of procedure . 54
6.1 General . 54
6.2 Synchronization DLPDU (SYN) . 54
6.3 Transmission complete DLPDU (CMP) . 60
6.4 In-ring request DLPDU (REQ) . 61
6.5 Claim DLPDU (CLM) . 63
6.6 Command DLPDU (COM) . 64
6.7 Cyclic data and cyclic data with transmission complete DLPDU (DT) and
(DT-CMP) . 65
6.8 RAS DLPDU (RAS) . 67
6.9 Loop repeat request DLPDU (LRR) . 68
6.10 Loop diagnosis DLPDU (LPD) . 72
7 DLE elements of procedure . 72
7.1 DLE elements of procedure for star-architecture . 72
7.2 DLE elements of procedure for loop-architecture . 96
7.3 Serializer and deserializer . 150
7.4 DLL management protocol . 150

Bibliography . 161

Figure 1 – Relationships of DLSAPs, DLSAP-addresses and group DL-addresses . 16
Figure 2 – Basic principle of medium access control . 21
Figure 3 – Interaction of PhS primitives to DLE . 23
Figure 4 – Data-link layer internal architecture of star-architecture . 25
Figure 5 – Data-link layer internal architecture of loop-architecture . 27
Figure 6 – Common MAC frame format for DLPDUs . 48
Figure 7 – Structure of FC field . 49
Figure 8 – Structure of SYN DLPDU . 55
Figure 9 – Structure of CMP DLPDU . 60
Figure 10 – Structure of REQ DLPDU . 61
Figure 11 – Structure of CLM DLPDU . 63
Figure 12 – Structure of COM DLPDU . 65
Figure 13 – Structure of DT DLPDU . 66
Figure 14 – Structure of RAS DLPDU. 67
Figure 15 – Structure of User data of loop-architecture . 67
Figure 16 – Structure of LRR DLPDU . 68
Figure 17 – Open-ring under control . 70
Figure 18 – Structure of LPD DLPDU . 72
Figure 19 – Overall structure of DLL . 73
Figure 20 – DLE state transition . 74
Figure 21 – State transition diagram of CTRC . 76
Figure 22 – State transition diagram of STRC . 79
Figure 23 – State transition diagram of ACM . 83
Figure 24 – State transition diagram of RMC sending and send arbitration . 91
Figure 25 – State transition diagram of RMC receiving . 94
Figure 26 – Overall structure of DLL . 97
Figure 27 – DLE state transition . 98
Figure 28 – State transition diagram of CTRC . 100
Figure 29 – State transition diagram of STRC . 104
Figure 30 – State transition diagram of ACM for 100 Mbps operation . 108
Figure 31 – State transition diagram of ACM for 1 000 Mbps operation . 109
Figure 32 – State transition diagram of RMC for 100 Mbps operation . 129
Figure 33 – State transition diagram of RMC for 1 000 Mbps operation . 130
Figure 34 – State transition diagram of DLM . 153
Figure 35 – State transition diagram of DLM . 157

– 4 – IEC 61158-4-11:2014 © IEC 2014
Table 1 – Data-link layer components of star-architecture . 24
Table 2 – Data-link layer components of loop-architecture . 26
Table 3 – DLE-variables and permissible values of star-architecture . 29
Table 4 – Observable variables and their value ranges of star-architecture . 31
Table 5 – DLE variables and permissible values of loop-architecture . 32
Table 6 – Observable variables and their value ranges of loop-architecture . 35
Table 7 – F-type: DLPDU type . 50
Table 8 – FCS length, polynomials and constants . 51
Table 9 – PN-parameter: 3rd octet . 55
Table 10 – Structure of CW: 4th octet . 56
Table 11 – PM parameter . 56
Table 12 – RMSEL parameter . 56
Table 13 – Structure of CW: 4th octet . 57
Table 14 – ST-parameter: 5th octet. 57
Table 15 – Th-parameter: 6th, 7th and 8th octets . 57
Table 16 – Tm-parameter: 9th and 10th octets . 58
Table 17 – Ts-parameter: 11th and 12th octet . 58
Table 18 – Tl parameter: 13th and 14th octets . 58
Table 19 – LL parameters: 15th to 46th octets . 59
Table 20 – NM parameter . 61
Table 21 – RN parameter . 62
Table 22 – CLM parameter: 4th octet . 63
Table 23 – DT parameter: 3rd and 4th octets . 66
Table 24 – RAS parameter: 3rd and 4th octets . 67
Table 25 – Format of the PS parameter: 3rd octet . 69
Table 26 – The value of the PP parameter . 69
Table 27 – The value of the send-enable-A/-B . 69
Table 28 – The value of the receive-enable-A/-B. 69
Table 29 – The value of the forward-enable-A/-B . 70
Table 30 – RN parameter: 4th octet . 70
Table 31 – Operational condition of the node . 71
Table 32 – Primitives exchanged between DLS-user and CTRC. 75
Table 33 – Primitives exchanged between CTRC and ACM . 75
Table 34 – Parameters used with primitives exchanged between DLS-user and CTRC . 76
Table 35 – CTRC state table . 77
Table 36 – CTRC functions table . 78
Table 37 – Primitives exchanged between DLS-user and STRC . 78
Table 38 – Primitives exchanged between STRC and ACM . 79
Table 39 – Parameters used with primitives exchanged between DLS-user and STRC . 79
Table 40 – STRC state table . 80
Table 41 – STRC functions table . 81
Table 42 – Primitives exchanged between ACM and RMC . 82
Table 43 – Parameters used with primitives exchanged between ACM and RMC . 82

Table 44 – Primitives exchanged between ACM and CTRC . 82
Table 45 – Parameters used with primitives exchanged between ACM and CTRC . 82
Table 46 – Primitives exchanged between ACM and STRC . 83
Table 47 – Parameters used with primitives exchanged between ACM and STRC. 83
Table 48 – ACM state table . 84
Table 49 – ACM function table . 89
Table 50 – Primitives exchanged between ACM and RMC . 90
Table 51 – Primitives exchanged between RMC and serializer / deserializer . 90
Table 52 – Primitives exchanged between RMC and Ph-layer . 90
Table 53 – Parameters between RMC and ACM . 90
Table 54 – Parameters between RMC and Ph-layer . 91
Table 55 – State table of RMC sending . 92
Table 56 – State table of RMC send arbitration . 93
Table 57 – State table for RMC receiving . 94
Table 58 – RMC function table . 96
Table 59 – Primitives exchanged between DLS-user and CTRC. 99
Table 60 – Primitives exchanged between CTRC and ACM . 100
Table 61 – Parameters used with primitives exchanged between DLS-user and CTRC . 100
Table 62 – CTRC state table . 101
Table 63 – CTRC functions table . 102
Table 64 – Primitives exchanged between DLS-user and STRC . 103
Table 65 – Primitives exchanged between STRC and ACM . 103
Table 66 – Parameters used with primitives exchanged between DLS-user and STRC . 103
Table 67 – STRC state table . 104
Table 68 – STRC functions table . 105
Table 69 – Primitives exchanged between ACM and RMC . 106
Table 70 – Parameters used with primitives exchanged between ACM and RMC . 106
Table 71 – Primitives exchanged between ACM and CTRC . 106
Table 72 – Parameters used with primitives exchanged between ACM and CTRC . 106
Table 73 – Primitives exchanged between ACM and STRC . 107
Table 74 – Parameters used with primitives exchanged between ACM and STRC. 107
Table 75 – ACM state table for 100 Mbps operation . 110
Table 76 – ACM state table for 1 000 Mbps operation . 117
Table 77 – ACM function table . 126
Table 78 – Primitives exchanged between ACM and RMC . 127
Table 79 – Primitives exchanged between RMC and Serializer / Deserializer . 127
Table 80 – Primitives exchanged between RMS and Ph-layer . 127
Table 81 – Parameters between RMC and ACM . 128
Table 82 – Parameters between RMC and Serializer / Deserializer, Ph-layer . 128
Table 83 – State table of RMC for 100 Mbps operation . 130
Table 84 – State table of RMC for 1 000 Mbps operation . 140
Table 85 – The RMC function table . 150
Table 86 – Primitives exchanged between DLMS-user and DLM . 151

– 6 – IEC 61158-4-11:2014 © IEC 2014
Table 87 – Parameters used with primitives exchanged between DL-user and DLM . 151
Table 88 – Event-related state change variables . 152
Table 89 – DLM state table . 153
Table 90 – DLM function table . 155
Table 91 – Primitives exchanged between DLMS-user and DLM . 156
Table 92 – Parameters used with primitives exchanged between DL-user and DLM . 156
Table 93 – Event-related state change variables . 157
Table 94 – DLM state table . 158
Table 95 – DLM function table . 160

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 4-11: Data-link layer protocol specification –
Type 11 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
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Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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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.
Attention is drawn to the fact that the use of the associated protocol type is restricted by its
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 layer protocol type to
be used with other layer protocols of the same type, or in other type combinations explicitly
authorized by its intellectual-property-right holders.
NOTE Combinations of protocol types are specified in IEC 61784-1 and IEC 61784-2.
International Standard IEC 61158-4-11 has been prepared by subcommittee 65C: Industrial
networks, of IEC technical committee 65: Industrial-process measurement, control and
automation.
This third edition cancels and replaces the second edition published in 2010. This edition
constitutes a technical revision.
The main changes with respect to the previous edition are addition in the loop (ring)-
architecture. More details:
– 8 – IEC 61158-4-11:2014 © IEC 2014
– Subclauses 4.6.1, 4.6.4 and 5.4.6, Clause 6 and 7.2 for the loop-architecture are
modified to cover the additional specifications for the higher data rate in the loop-
architecture;
– specifications for existing star-architecture are maintained as they are.
The text of this standard is based on the following documents:
FDIS Report on voting
65C/762/FDIS 65C/772/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.
A list of all the parts of the IEC 61158 series, published under the general title Industrial
communication networks – Fieldbus specifications, can be found on the IEC web site.
The committee has decided that the contents of this publication will remain unchanged until
the stability 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.
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 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. These rules for communication are intended to
provide a sound basis for development in order to serve a variety of purposes:
a) as a guide for implementors and designers;
b) for use in the testing and procurement of equipment;
c) as part of an agreement for the admittance of systems into the open systems environment;
d) as a refinement to the understanding of time-critical communications within OSI.
This standard is concerned, in particular, with the communication and interworking of sensors,
effectors and other automation devices. By using this standard together with other standards
positioned within the OSI or fieldbus reference models, otherwise incompatible systems may
work together in any combination.
Attention is drawn to the fact that 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 profile parts. Use of the various protocol types in
other combinations may require permission from their respective intellectual-property-right
holders.
The International Electrotechnical Commission (IEC) draws attention to the fact that it is
claimed that compliance with this document may involve the use of patents concerning
Type 11 elements and possibly other types given in 4.2, 4.4, 4.5, 5.4, 6.2 to 6.10, 7.1 and 7.2
as follows:
AU 2007320662(B2)  [TO]  Double ring network system, communication
control method thereof, transmission station, and communication control program of double
ring network system
ZL 200780042584.7  [TO]  Double ring network system, communication
control method thereof, transmission station, and communication control program of double
ring network system
JP 4991254(B2)  [TO]  Control method for double-ring network,
initializing method for double-ring network, transmission station of double-ring network,
restructuring method for abnormality occurrence of double-ring network, network system,
control method for network system, transmission station, and program of transmission station

KR 101149837(B1)  [TO]  Double ring network system, communication
control method thereof, transmission station, and communication control program of double
ring network system
RU 2420899(C2)  [TO]  Double-ring network system and method of
controlling communication in said network, transmission station and programme for
transmission stations
US 8411559(B2  [TO]  Double ring network system and communication
control method thereof, and transmission station, and program for transmission stations

– 10 – IEC 61158-4-11:2014 © IEC 2014
EP 2093942(A1)  [TO]  Double ring network system, communication
control method thereof, transmission station, and communication control program of double
ring network system
US 6711131(B1)  [TO]  Data transmitting apparatus, network interface
apparatus, and data transmitting system

JP 3461954(B2)  [TO]  Data transmitter
IEC takes no position concerning the evidence, validity and scope of these patent rights.
The holders of these patent rights have assured the IEC that they are willing to negotiate
licences either free of charge or 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 is registered with IEC. Information may be obtained from:
[TO]  Toshiba Corporation
1, Toshiba -cho
Fuchu-shi
Tokyo 183-8511, Japan
Attention: Intellectual Property Rights Section

Attention is drawn to the possibility that some of the elements of this document 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.
ISO (www.iso.org/patents) and IEC (http://patents.iec.ch) maintain on-line databases of
patents relevant to their standards. Users are encouraged to consult the databases for the
most up to date information concerning patents.

INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 4-11: Data-link layer protocol specification –
Type 11 elements
1 Scope
1.1 General
The data-link layer provides basic time-critical messaging communications between devices in
an automation environment.
This protocol provides communication opportunities to all participating data-link entities
a) in a synchronously-starting cyclic manner, according to a pre-established schedule, and
b) in a cyclic or acyclic asynchronous manner, as requested each cycle by each of those
data-link entities.
Thus this protocol can be characterized as one which provides cyclic and acyclic access
asynchronously but with a synchronous restart of each cycle.
1.2 Specifications
This standard specifies
a) procedures for the timely transfer of data and control information from one data-link user
entity to a peer user entity, and among the data-link entities forming the distributed data-
link service provider;
b) procedures for giving communications opportunities to all participating DL-entities,
sequentially and in a cyclic manner for deterministic and synchronized transfer at cyclic
intervals up to one millisecond;
c) procedures for giving communication opportunities available for time-critical data
transmission together with non-time-critical data transmission without prejudice to the
time-critical data transmission;
d) procedures for giving cyclic and acyclic communication opportunities for time-critical data
transmission with prioritized access;
e) procedures for giving communication opportunities based on standard ISO/IEC 8802-3
medium access control, with provisions for nodes to be added or removed during normal
operation;
f) the structure of the fieldbus DLPDUs used for the transfer of data and control information
by the protocol of this standard, and their representation as physical interface data units.
1.3 Procedures
The procedures are defined in terms of
a) the interactions between peer DL-entities (DLEs) through the exchange of fieldbus
DLPDUs;
b) the interactions between a DL-service (DLS) provider and a DLS-user in the same system
through the exchange of DLS primitives;
c) the interactions between a DLS-provider and a Ph-service provider in the same system
through the exchange of Ph-service primitives.

– 12 – IEC 61158-4-11:2014 © IEC 2014
1.4 Applicability
These procedures are applicable to instances of communication between systems which
support time-critical communications services within the data-link layer of the OSI or fieldbus
reference models, and which require the ability to interconnect in an open systems
interconnection environment.
Profiles provide a simple multi-attribute means of summarizing an implementation’s
capabilities, and thus its applicability to various time-critical communications needs.
1.5 Conformance
This standard also specifies conformance requirements for systems implementing these
procedures. This standard does not contain tests to demonstrate compliance with such
requirements.
2 Normative references
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 All parts of the IEC 61158 series, as well as IEC 61784-1 and IEC 61784-2 are maintained simultaneously.
Cross-references to these documents within the text therefore refer to the editions as dated in this list of normative
references.
IEC 61158-3-11:2007, Industrial communication networks – Fieldbus specifications –
Part 3-11: Data-link layer service definition – Type 11 elements
IEC 61158-5-11:2007, Industrial communication networks – Fieldbus specifications –
Part 5-11: Application layer service definition – Type 11 elements
ISO/IEC 7498-1, Information technology – Open Systems Interconnection – Basic Reference
Model: The Basic Model
ISO/IEC 7498-3, Information technology – Open Systems Interconnection – Basic Reference
Model: Naming and addressing
ISO/IEC 8802-3:2000, 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
ISO/IEC 10731, Information technology – Open Systems Interconnection – Basic Reference
Model – Conventions for the definition of OSI services
3 Terms, definitions, symbols and abbreviations
For the purposes of this document, the following terms, definitions, symbols and abbreviations
apply.
3.1 Reference model terms and definitions
This standard is based in part on the concepts developed in ISO/IEC 7498-1 and
ISO/IEC 7498-3, and makes use of the following terms defined therein.

3.1.1 called-DL-address [ISO/IEC 7498-3]
3.1.2 calling-DL-address [ISO/IEC 7498-3]
3.1.3 centralized multi-end-point-connection [ISO/IEC 7498-1]
3.1.4 correspondent (N)-entities [ISO/IEC 7498-1]
correspondent DL-entities  (N=2)
correspondent Ph-entities  (N=1)
3.1.5 demultiplexing [ISO/IEC 7498-1]
3.1.6 DL-address [ISO/IEC 7498-3]
3.1.7 DL-address-mapping [ISO/IEC 7498-1]
3.1.8 DL-connection [ISO/IEC 7498-1]
3.1.9 DL-connection-end-point [ISO/IEC 7498-1]
3.1.10 DL-connection-end-point-identifier [ISO/IEC 7498-1]
3.1.11 DL-connection-mode transmission [ISO/IEC 7498-1]
3.1.12 DL-connectionless-mode transmission [ISO/IEC 7498-1]
3.1.13 DL-data-sink [ISO/IEC 7498-1]
3.1.14 DL-data-source [ISO/IEC 7498-1]
3.1.15 DL-duplex-transmission [ISO/IEC 7498-1]
3.1.16 DL-facility [ISO/IEC 7498-1]
3.1.17 DL-local-view [ISO/IEC 7498-3]
3.1.18 DL-name [ISO/IEC 7498-3]
3.1.19 DL-protocol [ISO/IEC 7498-1]
3.1.20 DL-protocol-connection-identifier [ISO/IEC 7498-1]
3.1.21 DL-protocol-control-information [ISO/IEC 7498-1]
3.1.22 DL-protocol-data-unit [ISO/IEC 7498-1]
3.1.23 DL-protocol-version-identifier [ISO/IEC 7498-1]
3.1.24 DL-relay [ISO/IEC 7498-1]
...