EN 61158-4-11:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-11. del: Specifikacija protokola na nivoju podatkovnih povezav - Elementi tipa 11 (IEC 61158-4-11:2007)Industrielle Kommunikationsnetze - Feldbusse - Teil 4-11: Protokollspezifikation des Data Link Layer (Sicherungsschicht) - Typ 11-ElementeRéseaux de communication industriels - Spécifications des bus de terrain - Partie 4-11: Spécification des protocoles des couches de liaison de données - Eléments de type 11Industrial communication networks - Fieldbus specifications -- Part 4-11: Data-link layer protocol specification - Type 11 elements35.110OmreževanjeNetworking35.100.20Podatkovni povezovalni slojData link layer25.040.40Merjenje in krmiljenje industrijskih postopkovIndustrial process measurement and controlICS:Ta slovenski standard je istoveten z:EN 61158-4-11:2008SIST EN 61158-4-11:2008en,de01-junij-2008SIST EN 61158-4-11:2008SLOVENSKI
STANDARDSIST EN 61158-4:20041DGRPHãþD

EUROPEAN STANDARD EN 61158-4-11 NORME EUROPÉENNE
EUROPÄISCHE NORM February 2008
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 61158-4-11:2008 E
ICS 35.100.20; 25.040.40 Partially supersedes EN 61158-4:2004
English version
Industrial communication networks -
Fieldbus specifications -
Part 4-11: Data-link layer protocol specification -
Type 11 elements (IEC 61158-4-11:2007)
Réseaux de communication industriels -
Spécifications des bus de terrain -
Partie 4-11: Spécification des protocoles des couches de liaison de données -
Eléments de type 11 (CEI 61158-4-11:2007)
Industrielle Kommunikationsnetze -
Feldbusse -
Teil 4-11: Protokollspezifikation des
Data Link Layer (Sicherungsschicht) -
Typ 11-Elemente (IEC 61158-4-11:2007)
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.
- 2 -
Foreword The text of document 65C/474/FDIS, future edition 1 of IEC 61158-4-11, 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 61158-4-11 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 11 and possibly other types:
US 4,930,121
[To]
Network system using token-passing bus with multiple priority levels
US 5,414,813
[To]
Direct transfer from a receive buffer to a host in a token-passing type network data transmission system
US 6,711,131
[To]
Data transmitting apparatus, network interface apparatus, and data transmitting system 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:
[To]
Toshiba Corporation
1-1, Shibaura 1-Chome
Minato-ku Tokyo 105-8001, Japan
Attention: Intellectual Property Rights Section. 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. __________ SIST EN 61158-4-11:2008

- 3 - EN 61158-4-11:2008 Endorsement notice The text of the International Standard IEC 61158-4-11:2007 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 61158-5-11 NOTE
Harmonized as EN 61158-5-11:2008 (not modified). IEC 61158-6-11 NOTE
Harmonized as EN 61158-6-11:2008 (not modified). IEC 61784-2 NOTE
Harmonized as EN 61784-2:2008 (not modified). __________ SIST EN 61158-4-11:2008

- 4 -
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 61158-3-11 -1) Industrial communication networks -
Fieldbus specifications -
Part 3-11: Data-link layer service definition - Type 11 elements EN 61158-3-11 20082)
ISO/IEC 7498-1 -1) Information technology - Open Systems Interconnection - Basic Reference Model:
The Basic Model EN ISO/IEC 7498-1 19952)
ISO/IEC 7498-3 -1) Information technology - Open Systems Interconnection - Basic Reference Model: Naming and addressing - -
ISO/IEC 8802-3 -1) 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 -1) Information technology - Open Systems Interconnection - Basic reference model - Conventions for the definition of OSI services - -
1) Undated reference. 2) Valid edition at date of issue. SIST EN 61158-4-11:2008

IEC 61158-4-11Edition 1.0 2007-12INTERNATIONAL STANDARD
Industrial communication networks – Fieldbus specifications –
Part 4-11: Data-link layer protocol specification – Type 11 elements
INTERNATIONAL ELECTROTECHNICAL COMMISSION XCICS 35.100.20; 25.040.40 PRICE CODEISBN 2-8318-9436-0SIST EN 61158-4-11:2008

– 2 – 61158-4-11 © IEC:2007(E) CONTENTS FOREWORD.5 INTRODUCTION.7 1 Scope.8 1.1 General.8 1.2 Specifications.8 1.3 Procedures.8 1.4 Applicability.9 1.5 Conformance.9 2 Normative references.9 3 Terms, definitions, symbols and abbreviations.9 3.1 Reference model terms and definitions.9 3.2 Service convention terms and definitions.11 3.3 Terms and definitions.12 3.4 Symbols and abbreviations.16 4 Overview of the DL-protocol.17 4.1 General.17 4.2 Overview of the medium access control.17 4.3 Service assumed from the PhL.18 4.4 DLL architecture.19 4.5 Access control machine and schedule support functions.21 4.6 Local parameters, variable, counters, timers.22 5 General structure and encoding of PhIDUs and DLPDU and related elements of procedure.32 5.1 Overview.32 5.2 PhIDU structure and encoding.32 5.3 Common MAC frame structure, encoding and elements of procedure.33 5.4 Elements of the MAC frame.34 5.5 Order of bit transmission.38 5.6 Invalid DLPDU.38 6 DLPDU-specific structure, encoding and elements of procedure.39 6.1 General.39 6.2 Synchronization DLPDU (SYN).39 6.3 Transmission complete DLPDU (CMP).44 6.4 In-ring request DLPDU (REQ).45 6.5 Claim DLPDU (CLM).46 6.6 Command (COM) DLPDU.47 6.7 Cyclic data and cyclic data with transmission complete DLPDU (DT) and (DT-CMP).48 6.8 RAS DLPDU (RAS).49 7 DLE elements of procedure.50 7.1 Overall structure.50 7.2 Initialization.51 7.3 Cyclic transmission TX/RX control (CTRC).52 7.4 Sporadic TX/RX control (STRC).56 7.5 Access control machine (ACM).59 7.6 Redundancy medium control (RMC).67 7.7 Serializer and deserializer.74 SIST EN 61158-4-11:2008

61158-4-11 © IEC:2007(E) – 3 – 7.8 DLL management protocol.74 Bibliography.80
Figure 1 – Relationships of DLSAPs, DLSAP-addresses and group DL-addresses.13 Figure 2 – Basic principle of medium access control.18 Figure 3 – Interaction of PhS primitives to DLE.19 Figure 4 – Data-link layer internal architecture.21 Figure 5 –
Common MAC frame format for DLPDUs.33 Figure 6 – Sporadic DLPDU format.34 Figure 7 – Structure of FC field.35 Figure 8 – Structure of SYN DLPDU.39 Figure 9 – Structure of CMP DLPDU.44 Figure 10 – Structure of the REQ DLPDU.45 Figure 11 – Structure of CLM DLPDU.46 Figure 12 – Structure of COM DLPDU.47 Figure 13 – Structure of DT DLPDU.48 Figure 14 – Structure of RAS DLPDU.49 Table 18 – RAS parameter : 3rd and 4th octets.49 Figure 15 – Overall structure of DLL.51 Figure 16 – DLE state transition.52 Figure 17 – State transition diagram of CTRC.54 Figure 18 – State transition diagram of STRC.57 Table 29 – Primitives exchanged between ACM and RMC.60 Figure 19 – State transition diagram of ACM.62 Figure 20 – State transition diagram of RMC sending and send arbitration.69 Figure 21 – State transition diagram of RMC receiving.72 Figure 22 – State transition diagram of DLM.77
Table 1 – Data-link layer components.20 Table 2 – Mandatory DLE-variables and permissible values.22 Table 3 – Observable variables and their value ranges.23 Table 4 – F-type: DLPDU type.35 Table 5 – FCS length, polynomials and constants.36 Table 6 – PN -parameter: 3rd octet.40 Table 7 – CW -parameters: 4th octet.40 Table 8 – PM parameter.40 Table 9 – RMSEL parameter.41 Table 10 – ST-parameter: 5th octet.41 Table 11 – Th-parameter: 6th, 7th and 8th octets.41 Table 12 – Tm-parameter: 9th and 10th octets.42 Table 13 – Ts-parameter: 11th and 12th octets.42 Table 14 – Tl-parameter: 13th and 14th octets.42 Table 15 – LL parameters: 15th to 46th octets.43 SIST EN 61158-4-11:2008

– 4 – 61158-4-11 © IEC:2007(E) Table 16 – CLM parameter: 4th octet.46 Table 17 – DT parameter: 3rd and 4th octets.48 Table 18 – RAS parameter : 3rd and 4th octets.49 Table 19 – Primitives exchanged between DLS-user and CTRC.53 Table 20 – Primitives exchanged between CTRC and ACM.53 Table 21 – Parameters used with primitives exchanged between DLS-user and CTRC.54 Table 22 – CTRC state table.55 Table 23 – CTRC functions table.56 Table 24 – Primitives exchanged between DLS-user and STRC.56 Table 25 – Primitives exchanged between STRC and ACM.57 Table 26 – Parameters used with primitives exchanged between DLS-user and STRC.57 Table 27 – STRC state table.58 Table 28 – STRC functions table.59 Table 29 – Primitives exchanged between ACM and RMC.60 Table 30 – Parameters used with primitives exchanged between ACM and RMC.60 Table 31 – Primitives exchanged between ACM and CTRC.60 Table 32 – Parameters used with primitives exchanged between ACM and CTRC.60 Table 33 – Primitives exchanged between ACM and STRC.61 Table 34 – Parameters used with primitives exchanged between ACM and STRC.61 Table 35 – ACM state table.63 Table 36 – ACM function table.67 Table 37 – Primitives exchanged between ACM and RMC.68 Table 38 – Primitives exchanged between RMC and derializer / deserializer.68 Table 39 – Primitives exchanged between RMC and Ph-layer.68 Table 40 – Parameters between RMC and ACM.69 Table 41 – Parameters between RMC and Ph-layer.69 Table 42 – State table of RMC sending.70 Table 43 – State table of RMC send arbitration.71 Table 44 – State table for RMC receiving.72 Table 45 – RMC function table.74 Table 46 – Primitives exchanged between DLMS-user and DLM.75 Table 47 – Parameters used with primitives exchanged between DL-user and DLM.75 Table 48 – Event-related state change variables.76 Table 49 – DLM state table.77 Table 50 – DLM function table.79
61158-4-11 © IEC:2007(E) – 5 – 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 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 11 and possibly other Types: US 4,930,121 [To] Network system using token-passing bus with multiple priority levels US 5,414,813 [To] Direct transfer from a receive buffer to a host in a token-passing type network data transmission system US 6,711,131 [To] Data transmitting apparatus, network interface apparatus, and data transmitting system IEC takes 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: SIST EN 61158-4-11:2008

– 6 – 61158-4-11 © IEC:2007(E) [To] Toshiba Corporation 1-1, Shibaura 1-Chome Minato-ku Tokyo 105-8001, Japan Attention:
Intellectual Property Rights Section. 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 61158-4-11 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. This part and its Type 11 companion parts also cancel and replace IEC/PAS 62406, 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. SIST EN 61158-4-11:2008

61158-4-11 © IEC:2007(E) – 7 – 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. SIST EN 61158-4-11:2008

– 8 – 61158-4-11 © IEC:2007(E) 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. SIST EN 61158-4-11:2008

61158-4-11 © IEC:2007(E) – 9 – 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 referenced documents are indispensable for the application of this standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61158-3-11, Industrial communication networks – Fieldbus specifications – Part 3-11: Data-link layer service definition – Type 11 elements 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 8802-3:2000, 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 standard, 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 [7498-3]3.1.2 calling-DL-address [7498-3]3.1.3 centralized multi-end-point-connection [7498-1]SIST EN 61158-4-11:2008

– 10 – 61158-4-11 © IEC:2007(E) 3.1.4 correspondent (N)-entities
correspondent DL-entities
(N=2)
correspondent Ph-entities
(N=1) [7498-1]3.1.5 demultiplexing [7498-1]3.1.6 DL-address [7498-3]3.1.7 DL-address-mapping [7498-1]3.1.8 DL-connection [7498-1]3.1.9 DL-connection-end-point [7498-1]3.1.10 DL-connection-end-point-identifier [7498-1]3.1.11 DL-connection-mode transmission [7498-1]3.1.12 DL-connectionless-mode transmission [7498-1]3.1.13 DL-data-sink [7498-1]3.1.14 DL-data-source [7498-1]3.1.15 DL-duplex-transmission [7498-1]3.1.16 DL-facility [7498-1]3.1.17 DL-local-view [7498-3]3.1.18 DL-name [7498-3]3.1.19 DL-protocol [7498-1]3.1.20 DL-protocol-connection-identifier [7498-1]3.1.21 DL-protocol-control-information [7498-1]3.1.22 DL-protocol-data-unit [7498-1]3.1.23 DL-protocol-version-identifier [7498-1]3.1.24 DL-relay [7498-1]3.1.25 DL-service-connection-identifier [7498-1]3.1.26 DL-service-data-unit [7498-1]3.1.27 DL-simplex-transmission [7498-1]3.1.28 DL-subsystem [7498-1]3.1.29 DL-user-data [7498-1]3.1.30 flow control [7498-1]3.1.31 layer-management [7498-1]3.1.32 multiplexing [7498-3]3.1.33 naming-(addressing)-authority [7498-3]3.1.34 naming-(addressing)-domain [7498-3]3.1.35 naming-(addressing)-subdomain [7498-3]SIST EN 61158-4-11:2008

61158-4-11 © IEC:2007(E) – 11 – 3.1.36 (N)-entity
DL-entity
Ph-entity [7498-1]3.1.37 (N)-interface-data-unit
DL-service-data-unit
(N=2)
Ph-interface-data-unit
(N=1) [7498-1]3.1.38 (N)-layer
DL-layer
(N=2)
Ph-layer
(N=1) [7498-1]3.1.39 (N)-service
DL-service
(N=2)
Ph-service
(N=1) [7498-1]3.1.40 (N)-service-access-point
DL-service-access-point
(N=2)
Ph-service-access-point
(N=1) [7498-1]3.1.41 (N)-service-access-point-address
DL-service-access-point-address
(N=2)
Ph-service-access-point-address
(N=1) [7498-1]3.1.42 peer-entities [7498-1]3.1.43 Ph-interface-control-information [7498-1]3.1.44 Ph-interface-data [7498-1]3.1.45 primitive name [7498-3]3.1.46 reassembling [7498-1]3.1.47 recombining [7498-1]3.1.48 reset [7498-1]3.1.49 responding-DL-address [7498-3]3.1.50 routing [7498-1]3.1.51 segmenting [7498-1]3.1.52 sequencing [7498-1]3.1.53 splitting [7498-1]3.1.54 synonymous name [7498-3]3.1.55 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: SIST EN 61158-4-11:2008

– 12 – 61158-4-11 © IEC:2007(E) 3.2.1 acceptor 3.2.2 asymmetrical service 3.2.3 confirm (primitive);
requestor.deliver (primitive) 3.2.4 deliver (primitive) 3.2.5 DL-confirmed-facility 3.2.6 DL-facility 3.2.7 DL-local-view 3.2.8 DL-mandatory-facility 3.2.9 DL-non-confirmed-facility 3.2.10 DL-provider-initiated-facility 3.2.11 DL-provider-optional-facility 3.2.12 DL-service-primitive;
primitive 3.2.13 DL-service-provider 3.2.14 DL-service-user 3.2.15 DL-user-optional-facility 3.2.16 indication (primitive)
acceptor.deliver (primitive) 3.2.17 multi-peer 3.2.18 request (primitive);
requestor.submit (primitive) 3.2.19 requestor 3.2.20 response (primitive);
acceptor.submit (primitive) 3.2.21 submit (primitive) 3.2.22 symmetrical service 3.3 Terms and definitions 3.3.1
common memory virtual common memory over Type 11 fieldbus, which is shared by participating Type 11 fieldbus nodes and is primarily used for real-time communications by the time-critical cyclic data service 3.3.2
data DLPDU DLPDU that carries a DLSDU from a local DLS-user to a remote DLS-user 3.3.3
DLCEP-address DL-address which designates either SIST EN 61158-4-11:2008

61158-4-11 © IEC:2007(E) – 13 – a) one peer DL-connection-end-point, or b) one multi-peer publisher DL-connection-end-point and implicitly the corresponding set of subscriber DL-connection-end-points where each DL-connection-end-point exists within a distinct DLSAP and is associated with a corresponding distinct DLSAP-address 3.3.4
DL-segment, link, local link single DL-subnetwork in which any of the connected DLEs may communicate directly, without any intervening DL-relaying, whenever all of those DLEs that are participating in an instance of communication are simultaneously attentive to the DL-subnetwork during the period(s) of attempted communication 3.3.5
DLSAP distinctive point at which DL-services are provided by a single DL-entity to a single higher-layer entity NOTE
This definition, derived from ISO/IEC 7498-1, is repeated here to facilitate understanding of the critical distinction between DLSAPs and their DL-addresses. (See Figure 1.)
PhSAP PhSAP DL-entity DLS-user-entity DLS-user-entity DLSAP DLSAP DLSAP DLSAP-
addresses group DL-
address DLSAP-
address Ph-layer DL-layer DLS-users DLSAP-
address
NOTE 1
DLSAPs and PhSAPs are depicted as ovals spanning the boundary between two adjacent layers. NOTE 2
DL-addresses are depicted as designating small gaps (points of access) in the DLL portion of a DLSAP. NOTE 3
A single DL-entity may have multiple DLSAP-addresses and group DL-addresses associated with a single DLSAP. Figure 1 – Relationships of DLSAPs, DLSAP-addresses and group DL-addresses 3.3.6
DL(SAP)-address either an individual DLSAP-address, designating a single DLSAP of a single DLS-user, or a group DL-address potentially designating multiple DLSAPs, each of a single DLS-user NOTE
This terminology is chosen because ISO/IEC 7498-3 does not permit the use of the term DLSAP-address to designate more than a single DLSAP at a single DLS-user. SIST EN 61158-4-11:2008

– 14 – 61158-4-11 © IEC:2007(E) 3.3.7
(individual) DLSAP-address DL-address that designates only one DLSAP within the extended link NOTE
A single DL-entity may have multiple DLSAP-addresses associated with a single DLSAP. 3.3.8
extended link DL-subnetwork, consisting of the maximal set of links interconnected by DL-relays, sharing a single DL-name (DL-address) space, in which any of the connected DL-entities may communicate, one with another, either directly or with the assistance of one or more of those intervening DL-relay entities NOTE
An extended link may be composed of just a single link. 3.3.9
FCS error error that occurs when the computed frame check sequence value after reception of all the octets in a DLPDU does not match the expected residual 3.3.10
frame denigrated synonym for DLPDU 3.3.11
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 3.3.12
high-speed cyclic data data conveyed by means of high-speed cyclic data transmission 3.3.13
high-speed cyclic data transmission highest priority of time-critical cyclic data service 3.3.14
implicit token mechanism that governs the right to transmit NOTE
No actual token message is transmitted on the medium. Each node keeps track of the node that it believes currently holds the right to transmit. The right to transmit is passed from node to node by keeping the node that last transmitted. A slot time is used to allow a missing node to be skipped in the rotation. 3.3.15
low-speed cyclic data data conveyed by means of low-speed cyclic data transmission 3.3.16
low-speed cyclic data transmission lowest priority of time-critical cyclic data service 3.3.17
medium-speed cyclic data data conveyed by means of medium-speed cyclic data transmission SIST EN 61158-4-11:2008

61158-4-11 © IEC:2007(E) – 15 – 3.3.18
medium-speed cyclic data transmission second-highest priority of time-critical cyclic data service 3.3.19
multi-peer DLC
centralized multi-end-point DL-connection offering DL-duplex-transmission between a single distinguished DLS-user known as the publisher or publishing DLS-user, and a set of peer but undistinguished DLS-users known collectively as the subscribers or subscribing DLS-users. The publishing DLS-user can send to the subscribing DLS-users as a group (but not individually), and the subscribing DLS-users can send to the publishing DLS-user (but not to each other) 3.3.20
multipoint connection connection from one node to many nodes
NOTE
Multipoint connections allows data transfer from a single publisher to be received by many subscriber nodes. 3.3.21
node single DL-entity as it appears on one local link 3.3.22
node DL-address DL-address which designates the (single) DL-entity associated with a single node on a specific local link 3.3.23
node-id two-octet primary identifier for the DLE on the local link, whose values are constrained NOTE
A permissible value is from 1 to 255. A value 0 is specifically used for SYN node, which emits SYN frame. 3.3.24
receiving DLS-user DL-service user that acts as a recipient of DL-user-data NOTE
A DL-service user can be concurrently both a sending and receiving DLS-user. 3.3.25
sending DLS-user DL-service user that acts as a source of DL-user-data 3.3.26
slot-time 512-bit time of the physical signaling symbol specified in the ISO/IEC 8802-3, Clause 29 3.3.27
sporadic message data service aperiodic message transfer which sporadically occurs upon DLS-user requesting one or more message to transfer, and regular ISO/IEC 8802-3 Ethernet message frame is transferred by
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