EN 61158-4-12:2008

SLOVENSKI STANDARD
01-junij-2008
1DGRPHãþD
SIST EN 61158-4:2004
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-12. del:
Specifikacija protokola na nivoju podatkovnih povezav - Elementi tipa 12 (IEC
61158-4-12:2007)
Industrial communication networks - Fieldbus specifications -- Part 4-12: Data-link layer
protocol specification - Type 12 elements
Industrielle Kommunikationsnetze - Feldbusse - Teil 4-12: Protokollspezifikation des
Data Link Layer (Sicherungsschicht) - Typ 12-Elemente
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-12:
Spécification des protocoles des couches de liaison de données - Eléments de type 12
Ta slovenski standard je istoveten z: EN 61158-4-12:2008
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 61158-4-12
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 4-12: Data-link layer protocol specification -
Type 12 elements
(IEC 61158-4-12:2007)
Réseaux de communication industriels -  Industrielle Kommunikationsnetze -
Spécifications des bus de terrain - Feldbusse -
Partie 4-12: Spécification des protocoles Teil 4-12: Protokollspezifikation
des couches de liaison de données - des Data Link Layer (Sicherungsschicht) -
Eléments de type 12 Typ 12-Elemente
(CEI 61158-4-12:2007) (IEC 61158-4-12:2007)

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 61158-4-12:2008 E
Foreword
The text of document 65C/474/FDIS, future edition 1 of IEC 61158-4-12, 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 61158-4-12 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.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61158-4-12:2007 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 61131-2 NOTE  Harmonized as EN 61131-2:2007 (not modified).
IEC 61131-3 NOTE  Harmonized as EN 61131-6:2007 (not modified).
IEC 61158-5-12 NOTE  Harmonized as EN 61158-5-12:2008 (not modified).
IEC 61158-6-12 NOTE  Harmonized as EN 61158-6-12:2008 (not modified).
IEC 61784-2 NOTE  Harmonized as EN 61784-2:2008 (not modified).
__________
- 3 - EN 61158-4-12:2008
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
IEC 61158-2 2007 Industrial communication networks - Fieldbus EN 61158-2 2008
specifications -
Part 2: Physical layer specification and service
definition
1) 2)
IEC 61158-3-12 - Industrial communication networks - Fieldbus EN 61158-3-12 2008
specifications -
Part 3-12: Data-link layer service definition -
Type 12 elements
1)
IEC 61588 - Precision clock synchronization protocol for - -
networked measurement and control systems

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)
ISO/IEC 8802-1 - Information technology - Telecommunications - -
and information exchange between systems -
Local and metropolitan area networks -
Specific requirements -
Part 1: Overview of Local Area Network
Standards
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)
Undated reference.
2)
Valid edition at date of issue.

Publication Year Title EN/HD Year

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

1)
IEEE 802.1Q - IEEE Standard for Local and Metropolitan - -
Area Networks - Virtual Bridged Local Area
Networks
1)
IETF RFC 768 - User Datagram Protocol - -

1)
IETF RFC 791 - Internet Protocol - -

IEC 61158-4-12
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 4-12: Data-link layer protocol specification – Type 12 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XG
ICS 35.100.20; 25.040.40 ISBN 2-8318-9439-5

– 2 – 61158-4-12 © 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.10
1.5 Conformance.10
2 Normative references .11
3 Terms, definitions, symbols and abbreviations.11
3.1 Reference model terms and definitions.11
3.2 Service convention terms and definitions.12
3.3 Common terms and definitions .13
3.4 Additional Type 12 definitions.13
3.5 Common symbols and abbreviations .16
3.6 Additional Type 12 symbols and abbreviations .17
3.7 Conventions .19
4 Overview of the DL-protocol .24
4.1 Operating principle .24
4.2 Topology .24
4.3 Frame processing principles.24
4.4 Data-link layer overview .25
4.5 Error detection overview.26
4.6 Node reference model .26
4.7 Operation overview .27
5 Frame structure .28
5.1 Frame coding principles .28
5.2 Data types and encoding rules .28
5.3 DLPDU structure .31
5.4 Type 12 DLPDU structure.33
5.5 Network variable structure.48
5.6 Type 12 mailbox structure .48
6 Attributes.49
6.1 Management .49
6.2 Statistics .66
6.3 Watchdogs .69
6.4 Slave information interface .72
6.5 Media independent interface (MII) .77
6.6 Fieldbus memory management unit (FMMU).80
6.7 Sync manager .83
6.8 Distributed clock.90
7 DL-user memory.94
7.1 Overview .94
7.2 Mailbox access type .95
7.3 Buffered access type.98
8 Type 12: FDL protocol state machines.100

61158-4-12 © IEC:2007(E) – 3 –
8.1 Overview of slave DL state machines .100
8.2 State machine description .100
Annex A (informative) – Type 12: Additional specifications on DL-Protocol state
machines.108
A.1 DHSM .108
A.2 SYSM.127
A.3 RMSM .140
Bibliography.144

Figure 1 – Type description example .20
Figure 2 – Common structure of specific fields.21
Figure 3 – Frame structure.25
Figure 4 – Mapping of data in a frame.26
Figure 5 – Slave node reference model.27
Figure 6 – Type 12 PDUs embedded in Ethernet frame.28
Figure 7 – Type 12 PDUs embedded in UDP/IP .28
Figure 8 – DL information type description .51
Figure 9 – Address type description.53
Figure 10 – DL control type description.55
Figure 11 – DL status type description .57
Figure 12 – Successful write sequence to DL-user control register .59
Figure 13 – Successful read sequence to the DL-user status register .60
Figure 14 – RX error counter type description .67
Figure 15 – Lost link counter type description .68
Figure 16 – Additional counter type description.69
Figure 17 – Sync configuration type description .70
Figure 18 – Watchdog divider type description.70
Figure 19 – Sync manager watchdog type description.71
Figure 20 – Sync manager watchdog status type description .71
Figure 21 – Watchdog counter type description.72
Figure 22 – Slave information interface access type description .72
Figure 23 – Slave information interface control/status type description .74
Figure 24 – Slave information interface address type description.76
Figure 25 – Slave information interface data type description .77
Figure 26 – MII control/status type description .78
Figure 27 – MII address type description .79
Figure 28 – MII data type description .80
Figure 29 – FMMU mapping example.80
Figure 30 – FMMU entity type description .81
Figure 31 – SyncM mailbox interaction.84
Figure 32 – SyncM buffer allocation.84
Figure 33 – SyncM buffer interaction .85
Figure 34 – Handling of write/read toggle with read mailbox .86
Figure 35 – Sync manager channel type description .88

– 4 – 61158-4-12 © IEC:2007(E)
Figure 36 – Distributed clock local time parameter type description .92
Figure 37 – Successful write sequence to mailbox .95
Figure 38 – Bad write sequence to mailbox.96
Figure 39 – Successful read sequence to mailbox.96
Figure 40 – Bad read sequence to mailbox .97
Figure 41 – Successful write sequence to buffer .98
Figure 42 – Successful read sequence to buffer.99
Figure 43 – Structuring of the protocol machines of an slave .100
Figure 44 – Slave information interface read operation . 102
Figure 45 – Slave information interface write operation. 103
Figure 46 – Slave information interface reload operation . 104
Figure 47 – Distributed clock .106
Figure 48 – Delay measurement sequence . 107

Table 1 – PDU element description example.20
Table 2 – Example attribute description .21
Table 3 – State machine description elements .22
Table 4 – Description of state machine elements .23
Table 5 – Conventions used in state machines .23
Table 6 – Transfer Syntax for bit sequences .29
Table 7 – Transfer syntax for data type Unsignedn .29
Table 8 – Transfer syntax for data type Integern .30
Table 9 – Type 12 frame inside an Ethernet frame.31
Table 10 – Type 12 frame inside an UDP PDU.32
Table 11 – Type 12 frame structure containing Type 12 PDUs .33
Table 12 – Type 12 frame structure containing network variables .33
Table 13 – Type 12 frame structure containing mailbox .33
Table 14 – Auto Increment Physical Read (APRD).34
Table 15 – Configured Address Physical Read (FPRD) .35
Table 16 – Broadcast Read (BRD) .36
Table 17 – Logical Read (LRD) .37
Table 18 – Auto Increment Physical Write (APWR) .38
Table 19 – Configured Address Physical Write (FPWR) .39
Table 20 – Broadcast Write (BWR) .40
Table 21 – Logical Write (LWR) .41
Table 22 – Auto Increment Physical ReadWrite (APRW) .42
Table 23 – Configured Address Physical ReadWrite (FPRW) .43
Table 24 – Broadcast ReadWrite (BRW) .44
Table 25 – Logical ReadWrite (LRW) .45
Table 26 – Auto Increment Physical Read Multiple Write (ARMW) .46
Table 27 – Configured Address Physical Read Multiple Write (FRMW) .47
Table 28 – Network variable .48
Table 29 – Mailbox .48

61158-4-12 © IEC:2007(E) – 5 –
Table 30 – Error Reply Service Data.49
Table 31 – DL information.52
Table 32 – Configured station address.54
Table 33 – DL control .55
Table 34 – DL status.58
Table 35 – DLS-user specific registers.61
Table 36 – DLS-user event .63
Table 37 – DLS-user event mask .64
Table 38 – External event .65
Table 39 – External event mask.66
Table 40 – RX error counter.67
Table 41 – Lost link counter.68
Table 42 – Watchdog divider.70
Table 43 – PDI watchdog.70
Table 44 – Sync manager channel watchdog .71
Table 45 – Sync manager watchdog Status .71
Table 46 – Watchdog counter .72
Table 47 – Slave information interface size.73
Table 48 – Slave information interface control/status .75
Table 49 – Actual slave information interface address .76
Table 50 – Actual slave information interface data .77
Table 51 – MII control/status.78
Table 52 – Actual MII address.79
Table 53 – Actual MII data .80
Table 54 – Fieldbus memory management unit (FMMU) entity .82
Table 55 – Fieldbus memory management unit (FMMU).83
Table 56 – Sync manager channel .88
Table 57 – Sync manager Structure .90
Table 58 – Distributed clock local time parameter .93
Table 59 – Distributed clock DLS-user parameter .94
Table A.1 – Primitives issued by DHSM to PSM.108
Table A.2 – Primitives issued by PSM to DHSM.108
Table A.3 – Parameters used with primitives exchanged between DHSM and PSM. 108
Table A.4 – Identifier for the octets of a Ethernet frame .109
Table A.5 – DHSM state table.111
Table A.6 – DHSM function table .127
Table A.7 – Primitives issued by SYSM to DHSM.127
Table A.8 – Primitives issued by DHSM to SYSM.128
Table A.9 – Primitives issued by DL-User to SYSM.128
Table A.10 – Primitives issued by SYSM to DL-User.128
Table A.11 – Parameters used with primitives exchanged between SYSM and DHSM . 128
Table A.12 – SYSM state table .130
Table A.13 – SYSM function table.140

– 6 – 61158-4-12 © IEC:2007(E)
Table A.14 – Primitives issued by RMSM to SYSM .140
Table A.15 – Primitives issued by SYSM to RMSM .140
Table A.16 – Parameters used with primitives exchanged between RMSM and SYSM . 140
Table A.17 – RMSM state table.142
Table A.18 – RMSM function table.143

61158-4-12 © IEC:2007(E) – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 4-12: Data-link layer protocol specification – Type 12 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,
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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 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.
International Standard IEC 61158-4-12 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 technical addition, which also
replaces IEC/PAS 62407, 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.

– 8 – 61158-4-12 © IEC:2007(E)
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.

61158-4-12 © 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. 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.

– 10 – 61158-4-12 © IEC:2007(E)
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 4-12: Data-link layer protocol specification – Type 12 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, 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 transfer of data and control information from one data-link user entity to
one or more user entity;
b) the structure of the 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 DL-entities (DLEs) through the exchange of 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 the MAC services of ISO/IEC 8802-3.
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 reference
model, 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 part of this standard does not contain tests to demonstrate compliance with
such requirements.
61158-4-12 © IEC:2007(E) – 11 –
2 Normative references
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.
IEC 61158-2 (Ed.4.0), Industrial communication networks – Fieldbus specifications – Part 2:
Physical layer specification and service definition
IEC 61158-3-12, Industrial communication networks – Fieldbus specifications – Part 3-12:
Data-link layer service definition – Type 12 elements
IEC 61588, Precision clock synchronization protocol for networked measurement and control
system
ISO/IEC 7498-1, Information technology – Open Systems Interconnection – Basic Reference
Model – Basic Reference Model: The Basic Model
ISO/IEC 7498-3, Information technology – Open Systems Interconnection – Basic Reference
Model – Basic Reference Model: Naming and addressing
ISO/IEC 8802-1(E), ANSI/IEEE Std 802.1 Local and metropolitan area networks – Virtual
bridged local area networks.
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 9899, Programming Languages – C.
ISO/IEC 10731, Information technology – Open Systems Interconnection – Basic Reference
Model – Conventions for the definition of OSI services
IEEE 802.1Q, IEEE Standard for Local and metropolitan area networks – Virtual Bridged Local
Area Networks; available at
IETF RFC 768, User PDU Protocol; available at
IETF RFC 791, Internet Protocol; available at
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 DL-duplex-transmission
[7498-1]
3.1.2 DL-protocol [7498-1]
3.1.3 DL-protocol-data-unit [7498-1]

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3.1.4 (N)-entity [7498-1]
DL-entity
Ph-entity
3.1.5 (N)-interface-data-unit [7498-1]
DL-service-data-unit  (N=2)
Ph-interface-data-unit  (N=1)
3.1.6 (N)-layer [7498-1]
DL-layer  (N=2)
Ph-layer  (N=1)
3.1.7 (N)-service [7498-1]
DL-service  (N=2)
Ph-service  (N=1)
3.1.8 (N)-service-access-point [7498-1]
DL-service-access-point  (N=2)
Ph-service-access-point  (N=1)
3.1.9 (N)-service-access-point-address [7498-1]
DL-service-access-point-address  (N=2)
Ph-service-access-point-address  (N=1)
3.1.10 peer-entities [7498-1]
3.1.11 Ph-interface-data [7498-1]
3.1.12 primitive name [7498-3]
3.1.13 reassembling [7498-1]
3.1.14 recombining [7498-1]
3.1.15 reset [7498-1]
3.1.16 routing [7498-1]
3.1.17 segmenting [7498-1]
3.1.18 sequencing [7498-1]
3.1.19 splitting [7498-1]
3.1.20 systems-management [7498-1]
3.2 Service convention terms and definitions
This standard also makes use of the following terms defined in ISO/IEC 10731 as they apply
to the data-link layer:
3.2.1 asymmetrical service
3.2.2 confirm (primitive);
requestor.deliver (primitive)
3.2.3 deliver (primitive)
3.2.4 DL-service-primitive;
primitive
3.2.5 DL-service-provider
3.2.6 DL-service-user
61158-4-12 © IEC:2007(E) – 13 –
3.2.7 indication (primitive)
acceptor.deliver (primitive)
3.2.8 request (primitive);
requestor.submit (primitive)
3.2.9 requestor
3.2.10 response (primitive);
acceptor.submit (primitive)
3.2.11 submit (primitive)
3.2.12 symmetrical service
3.3 Common terms and definitions
NOTE  Many definitions are common to more than one protocol Type; they are not necessarily used by all protocol
Types.
For the purpose of this part of IEC 61158, the following definitions also apply:
3.3.1
frame
denigrated synonym for DLPDU
3.3.2
group DL-address
DL-address that potentially designates more than one DLSAP within the extended link. A
single DL-entity may have multiple group DL-addresses associated with a single DLSAP. A
single DL-entity also may have a single group DL-address associated with more than one
DLSAP
3.3.3
node
single DL-entity as it appears on one local link
3.3.4
receiving DLS-user
DL-service user that acts as a recipient of DLS-user-data
NOTE  A DL-service user can be concurrently both a sending and receiving DLS-user.
3.3.5
sending DLS-user
DL-servic
...