EN 61158-4-24:2014

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-24. del: Specifikacija protokola na ravni podatkovnih povezav - Elementi tipa 24 (IEC 61158-4-24:2014)Industrielle Kommunikationsnetze - Feldbusse - Teil 4-24: Protokollspezifikation des Data Link Layer (Sicherungsschicht) - Typ 24-Elemente (IEC 61158-4-24:2014)Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-24: Spécification du protocole de la couche liaison de données - Éléments de type 24 (CEI 61158-4-24:2014)Industrial communication networks - Fieldbus specifications - Part 4-24: Data-link layer protocol specification - Type 24 elements (IEC 61158-4-24:2014)35.110OmreževanjeNetworking35.100.20Podatkovni povezovalni slojData link layer25.040.40Merjenje in krmiljenje industrijskih postopkovIndustrial process measurement and controlICS:Ta slovenski standard je istoveten z:EN 61158-4-24:2014SIST EN 61158-4-24:2015en,fr,de01-marec-2015SIST EN 61158-4-24:2015SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 61158-4-24
October 2014 ICS 35.100.20; 25.040.40; 35.110
English Version
Industrial communication networks - Fieldbus specifications - Part 4-24: Data-link layer protocol specification - Type 24 elements (IEC 61158-4-24:2014)
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-24: Spécification du protocole de la couche liaison de données - Éléments de type 24 (CEI 61158-4-24:2014)
Industrielle Kommunikationsnetze - Feldbusse - Teil 4-24: Protokollspezifikation des Data Link Layer (Sicherungsschicht) - Typ 24-Elemente (IEC 61158-4-24:2014) This European Standard was approved by CENELEC on 2014-09-19. 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17,
B-1000 Brussels © 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61158-4-24:2014 E SIST EN 61158-4-24:2015

Foreword The text of document 65C/762/FDIS, future edition 1 of IEC 61158-4-24, 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 approved by CENELEC as EN 61158-4-24:2014.
The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-06-19 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2017-09-19
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association. Endorsement notice The text of the International Standard IEC 61158-4-24:2014 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 61158-1 NOTE Harmonised as EN 61158-1 IEC 61784-1 NOTE Harmonised as EN 61784-1 IEC 61784-2 NOTE Harmonised as EN 61784-2 SIST EN 61158-4-24:2015

- 3 - EN 61158-4-24:2014
Annex ZA (normative)
Normative references to international publications with their corresponding European publications
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 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu.
Publication Year Title EN/HD Year IEC 61158-2 -
Industrial communication networks - Fieldbus specifications
Part 2: Physical layer specification and service definition EN 61158-2 -
IEC 61158-3-24 2014
Industrial communication networks - Fieldbus specifications
Part 3-24: Data-link layer service definition - Type-24 elements EN 61158-3-24 2014
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 9899 -
Information technology - Programming languages - C - -
ISO/IEC 10731 -
Information technology - Open Systems Interconnection - Basic Reference Model - Conventions for the definition of OSI services - -
ISO/IEC 13239 2002
Information technology - Telecommunications and information exchange between systems - High-level data link control (HDLC) procedures - -
ISO/IEC 19501 2005
Information technology - Open Distributed Processing - Unified Modeling Language (UML) Version 1.4.2 - -
IEC 61158-4-24 Edition 1.0 2014-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Industrial communication networks – Fieldbus specifications –
Part 4-24: Data-link layer protocol specification – Type 24 elements
Réseaux de communication industriels – Spécifications des bus de terrain –
Partie 4-24: Spécification du protocole de la couche liaison de données –
Éléments de type 24
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XE ICS 25.040.40; 35.100.20; 35.110 PRICE CODE CODE PRIX ISBN 978-2-8322-1730-6
– 2 – IEC 61158-4-24:2014 © IEC 2014 CONTENTS FOREWORD . 6 INTRODUCTION . 8 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, abbreviations and conventions . 12 3.1 Reference model terms and definitions . 12 3.2 Service convention terms and definitions . 13 3.3 Common terms and definitions . 13 3.4 Symbols and abbreviations . 15 3.5 Additional type 24 symbols and abbreviations . 16 3.6 Common Conventions . 17 3.7 Additional Type 24 conventions . 18 4 Overview of DL-protocol . 19 4.1 Characteristic feature of DL-protocol . 19 4.2 DL layer component . 20 4.3 Timing sequence . 20 4.4 Service assumed from PhL . 28 4.5 Local parameters, variable, counters, timers . 29 5 DLPDU structure . 34 5.1 Overview . 34 5.2 Basic format DLPDU structure . 35 5.3 Short format DLPDU structure . 43 6 DLE element procedure . 47 6.1 Overview . 47 6.2 Cyclic transmission control sublayer . 47 6.3 Send Receive Control . 96 7 DL-management layer (DLM) . 103 7.1 Overview . 103 7.2 Primitive definitions . 103 7.3 DLM protocol machine . 104 7.4 Functions . 113 Bibliography . 115
Figure 1 – Data-link layer component . 20 Figure 2 – Timing chart of fixed-width time slot type cyclic communication . 21 Figure 3 – Timing chart of configurable time slot type cyclic communication . 23 Figure 4 – Schematic Diagram of Communication Interrupt Occurrence . 25 Figure 5 – Timing relationship between cyclic transmission and data processing . 27 Figure 6 – Timing chart example of acyclic communication . 28 SIST EN 61158-4-24:2015

IEC 61158-4-24:2014 © IEC 2014 – 3 – Figure 7 – Basic format DLPDU structure. 35 Figure 8 – Short format DLPDU structure . 43 Figure 9 – The state diagram of C1 master for fixed-width time slot . 49 Figure 10 – The state diagram of C2 master for fixed-width time slot . 55 Figure 11 – The state diagram of slave for fixed-width time slot . 59 Figure 12 – The state diagram of C1 master for configurable time slot . 62 Figure 13 – The state diagram of C2 master for configurable time slot . 70 Figure 14 – The state diagram of slave for configurable time slot . 73 Figure 15 – The state diagram of message initiator for basic format . 77 Figure 16 – The state diagram of message responder for basic format . 81 Figure 17 – The state diagram of message initiator for short format . 85 Figure 18 – The state diagram of message responder for short format . 89 Figure 19 – The state diagram of acyclic transmission protocol machine . 94 Figure 20 – Internal architecture of one-port SRC . 98 Figure 21 – Internal architecture of multi-port SRC . 98 Figure 22 – Internal architecture of serializer . 98 Figure 23 – Internal architecture of deserializer . 100 Figure 24 – State diagram of C1 master DLM . 105 Figure 25 – State diagram of Slave and C2 master DLM . 110
Table 1 – State transition descriptions . 18 Table 2 – Description of state machine elements . 18 Table 3 – Conventions used in state machines . 18 Table 4 – Characteristic features of the fieldbus data-link protocol . 19 Table 5 – List of the values of variable Cyc_sel . 29 Table 6 – List of the values of variable Tunit . 30 Table 7 – List of the values of variable PDUType . 32 Table 8 – List of the values of variable SlotType . 32 Table 9 – Transfer syntax for bit sequences . 34 Table 10 – Bit order . 35 Table 11 – Destination and Source address format . 36 Table 12 – Station address . 36 Table 13 – Extended address . 36 Table 14 – Message control field format (Information transfer format) . 36 Table 15 – Message control field format (Supervisory format) . 37 Table 16 – The list of Supervisory function bits . 37 Table 17 – Frame type and Data length format . 37 Table 18 – The list of Frame type. 38 Table 19 – Data format of Synchronous frame . 38 Table 20 – The field list of Synchronous frame. 39 Table 21 – Data format of Output data or Input data frame. 39 Table 22 – The field list of Output data or Input data frame . 39 Table 23 – Data format of Delay measurement start frame . 40 SIST EN 61158-4-24:2015

– 4 – IEC 61158-4-24:2014 © IEC 2014 Table 24 – The field list of Delay measurement start frame . 40 Table 25 – Data format of Delay measurement frame. 40 Table 26 – The field list of Delay measurement frame . 40 Table 27 – Data format of Status frame. 41 Table 28 – The field list of Status frame . 41 Table 29 – The list of the DLE status . 41 Table 30 – The list of Repeater status . 42 Table 31 – Data format of Delay measurement frame. 42 Table 32 – The field list of Cycle Information frame. 42 Table 33 – Data format of Message frae . 43 Table 34 – The field list of Message frame . 43 Table 35 – Range of Station address field. 44 Table 36 – Control field format (I/O data exchange format) . 44 Table 37 – Control field format (Message format) . 44 Table 38 – The field list of Message format . 45 Table 39 – Data format of Synchronous frame . 45 Table 40 – The field list of Sync frame . 46 Table 41 – Data format of Output data frame . 46 Table 42 – The field list of Output data frame . 46 Table 43 – Data format of Input data frame . 46 Table 44 – The field list of Input data frame . 46 Table 45 – The primitives and parameters for DLS-user interface issued by DLS-user . 47 Table 46 – The primitives and parameters for DLS-user interface issued by CTC . 47 Table 47 – The state table of C1 master for fixed-width time slot . 49 Table 48 – The state table of C2 master for fixed-width time slot . 56 Table 49 – The state table of slave for fixed-width time slot . 59 Table 50 – The state table of C1 master for configurable time slot . 62 Table 51 – The state table of C2 master for configurable time slot . 71 Table 52 – The state table of slave for configurable time slot . 73 Table 53 – The list of functions used by cyclic transmission machine . 75 Table 54 – The state table of message initiator for basic format . 77 Table 55 – The state table of message responder for basic format . 81 Table 56 – The state table of message initiator for short format . 85 Table 57 – The state table of message responder for short format . 89 Table 58 – List of functions used by the message segmentation machine . 93 Table 59 – The state table of acyclic transmission protocol machine . 94 Table 60 – The list of functions used acyclic transmission protocol machine . 95 Table 61 – Primitives and parameters exchanged between CTC and DLM . 96 Table 62 – Error event primitive and parameters . 96 Table 63 – primitives and parameters for SRC-CTC interface . 97 Table 64 – Send frame primitive and parameters . 97 Table 65 – Receive frame primitives and parameters . 97 Table 66 – Primitives and parameters exchanged between SRC and DLM . 102 SIST EN 61158-4-24:2015

IEC 61158-4-24:2014 © IEC 2014 – 5 – Table 67 – Get value primitive and parameters . 103 Table 68 – Error event primitive and parameters . 103 Table 69 – The list of primitives and parameters (DLMS-user source) . 103 Table 70 – The list of primitives and parameters (DLM source) . 104 Table 71 – State table of C1-Master DLM . 105 Table 72 – State table of Slave and C2 master DLM . 110 Table 73 – The list of the functions used by DLM protocol machine . 113
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INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 4-24: Data-link layer protocol specification –
Type 24 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 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 61158-4-24 has been prepared by subcommittee 65C: Industrial networks, of IEC technical committee 65: Industrial-process measurement, control and automation.
IEC 61158-4-24:2014 © IEC 2014 – 7 – 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 the ISO/IEC Directives, Part 2. A list of all 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.
– 8 – IEC 61158-4-24:2014 © IEC 2014 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. 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 profile series. 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 as follows, where the [xx] notation indicates the holder of the patent right:
US 8223804 [YE] COMMUNICATION DEVICE, SYNCHRONIZED
JP 4760978
SYSTEM, AND SYCHRONIZED COMMUNICATION METHOD
CN 200880002225.3
EPC 08738862.5
KR 10-2009-7011514
TW 97111183
US 7769935 [YE] MASTER SLAVE COMMUNICATION SYSTEM AND MASTER
JP 4683346
SLAVE COMMUNICATION METHOD
US 8046512
EPC 07850686.2
TW 96150287
JP 4356698 [YE] COMMUNICATION DEVICE, SYNCHRONIZED COMMUNICATION
SYSTEM, AND SYCHRONIZED COMMUNICATION METHOD
IEC takes no position concerning the evidence, validity and scope of this patent right. The holders of these patent rights have assured IEC that they are willing to negotiate licenses 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
[YE]
YASKAWA ELECTRIC CORPORATION
2-1 Kurosakishiroishi, Yahatanishi-ku, Kitakyushu 806-0004, Japan
Attention; Intellectual Property Rights Section. SIST EN 61158-4-24:2015

IEC 61158-4-24:2014 © IEC 2014 – 9 – 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 data bases of patents relevant to their standards. Users are encouraged to consult the data bases for the most up to date information concerning patents.
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FIELDBUS SPECIFICATIONS –
Part 4-24: Data-link layer protocol specification –
Type 24 elements
1 Scope
General 1.1The 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, or b) in an acyclic manner, as requested 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.
Specifications 1.2This 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 datalink 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 64 ms; 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.
Procedures 1.3The 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 61158-4-24:2015

IEC 61158-4-24:2014 © IEC 2014 – 11 –
Applicability 1.4These 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.
Conformance 1.5This 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 61158-2, Industrial communication networks – Fieldbus specifications – Part 2: Physical layer specification and service definition IEC 61158-3-24:2014, Industrial communication networks – Fieldbus specifications –
Part 3-24: Data-link layer service definition – Type 24 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 9899, Information technology – Programming languages – C ISO/IEC 10731, Information technology – Open Systems Interconnection – Basic Reference Model – Conventions for the definition of OSI services ISO/IEC 13239:2002, Information technology – Telecommunications and information exchange between systems – High-level data link control (HDLC) procedures ISO/IEC 19501:2005, Information technology – Open Distributed Processing – Unified Modeling Language (UML) Version 1.4.2 SIST EN 61158-4-24:2015

– 12 – IEC 61158-4-24:2014 © IEC 2014 3 Terms, definitions, symbols, abbreviations and conventions For the purposes of this document, the following terms, definitions, symbols, abbreviations and conventions apply.
Reference model terms and definitions 3.1This 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.
3.1.1acknowledgement [ISO/IEC 7498-1]
3.1.2correspondent (N)-entities [ISO/IEC 7498-1]
correspondent DL-entities (N=2)
correspondent Ph-entities (N=1)
3.1.3DL-address [ISO/IEC 7498-3]
3.1.4DL-protocol [ISO/IEC 7498-1]
3.1.5DL-protocol-data-unit [ISO/IEC 7498-1]
3.1.6DL-service-data-unit [ISO/IEC 7498-1]
3.1.7DLS-user [ISO/IEC 7498-1]
3.1.8DLS-user-data [ISO/IEC 7498-1]
3.1.9event [ISO/IEC 19501]
3.1.10layer-management [ISO/IEC 7498-1]
3.1.11primitive name [ISO/IEC 7498-1]
3.1.12reset [ISO/IEC 7498-1]
3.1.13segmenting [ISO/IEC 7498-1]
3.1.14state [ISO/IEC 19501]
3.1.15state machine [ISO/IEC 19501]
3.1.16systems-management [ISO/IEC 7498-1]
3.1.17transition [ISO/IEC 19501]
3.1.18(N)-entity [ISO/IEC 7498-1]
DL-entity (N=2)
Ph-entity (N=1)
3.1.19(N)-layer [ISO/IEC 7498-1]
DL-layer (N=2)
Ph-layer (N=1)
(N)-service [ISO/IEC 7498-1]
DL-service (N=2)
IEC 61158-4-24:2014 © IEC 2014 – 13 –
Ph-service (N=1)
(N)-service-access-point [ISO/IEC 7498-1]
DL-service-access-point (N=2)
Ph-service-access-point (N=1)
Service convention terms and definitions 3.2This standard also makes use of the following terms defined in ISO/IEC 10731 as they apply to the data-link layer: 3.2.1 confirm (primitive) 3.2.2 DL-service-primitive; 3.2.3 DL-service-provider 3.2.4 DL-service-user 3.2.5 indication (primitive) 3.2.6 request (primitive) 3.2.7 requestor 3.2.8 response (primitive)
Common terms and definitions 3.3For the purposes of this document, the following terms and definitions apply.
3.3.1acyclic transmission non-periodic exchange of telegrams
3.3.2C1 master one of the station type that initiates and control cyclic transmission
3.3.3C1 message message communication that C1 master operates as initiator to exchange messages with slave or C2 master
3.3.4C2 master one of the station type that has the function of monitoring all process data transmitted through the network and may initiates message communication
3.3.5C2 message message communication that C2 master operates as initiator to exchange messages with slave or C1 master
3.3.6cyclic transmission periodic exchange of telegrams
3.3.7data generic term used to refer to any information carried over a fieldbus SIST EN 61158-4-24:2015

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3.3.8device physical entity connected to the fieldbus composed of at least one communication element (the network element) and which may have a control element and/or a final element (transducer, actuator, etc.)
3.3.9event driven mode transmission mode for the application layer protocol of the communication type 24 in which a transaction of command-response-exchanging arises as user’s demands
3.3.10frame synonym for DLPDU
3.3.11initiator station that initiates the exchange of process data or message
3.3.12interface shared boundary between two functional units, defined by functional characteristics, signal characteristics, or other characteristics as appropriate
3.3.13input data process data sent by the slave and received by the C1 master
3.3.14message ordered series of octets intended to convey information Note 1 to entry: Normally used to convey information between peers at the application layer.
3.3.15monitor slave slave that has the function of monitoring all process data transmitted through the network
3.3.16network set of nodes connected by some type of communication medium, including any intervening repeaters, bridges, routers and lower-layer gateways
3.3.17node a)
single DL-entity as it appears on one local link b)
end-point of a link in a network or a point at which two or more links meet
3.3.18output data process data sent by the C1 master and received by the slaves
3.3.19protocol convention about the data formats, time sequences, and error correction in the data exchange of communication systems SIST EN 61158-4-24:2015

IEC 61158-4-24:2014 © IEC 2014 – 15 –
3.3.20real-time communication transfer of data in real-time
3.3.21receiving DLS-user DL-service user that acts as a recipient of DL-user-data Note 1 to entry: A DL-service user may be concurrently both a sending and receiving DLS-user.
3.3.22responder station that responds process data or message after it has been initiated by initiator
3.3.23send data with acknowledge data transfer service with acknowledge of reception from corresponding DLE
3.3.24send data without acknowledge data transfer service without acknowledge of reception from corresponding DLE
3.3.25slave one of the station type that accesses the medium only after it has been initiated by C1-maser or C2 master
3.3.26sending DLS-user DL-service user that acts as a source of DL-user-data
3.3.27station node
3.3.28topology physical network architecture with respect to the connection between the stations of the communication system"
3.3.29transmission cycle fixed time period of cyclic transmission
3.3.30time slot Time period reserved so that initiator and responder may exchange one frame respectively
Symbols and abbreviations 3.4
3.4.1DA Destination address
3.4.2DL- Data-link layer (as a prefix)
3.4.3DLE DL-entity (the local active instance of the data-link layer)
3.4.4DLL DL-layer
3.4.5DLM DL-management SIST EN 61158-4-24:2015

– 16 – IEC 61158-4-24:2014 © IEC 2014
3.4.6DLME DL-management entity (the local active instance of DL-management)
3.4.7DLMS DL-management service
3.4.8DLPDU DL-protocol-data-unit
3.4.9DLS DL-service
3.4.10DLSAP DL-service-access-point
3.4.11DLSDU DL-service-data-unit
3.4.12FIFO First-in first-out (queuing method)
3.4.13ID Identifier
3.4.14OSI Open systems interconnection
3.4.15PDU Protocol data unit
3.4.16Ph- Physical layer (as a prefix)
3.4.17PhE Ph-entity (the local active instance of the physical layer)
3.4.18PhL Ph-layer
3.4.19PHY Physical layer device (specified in ISO/IEC 8802-3)
3.4.20QoS Quality of service
3.4.21RT Real-time
3.4.22SAP Service access point
3.4.23SDU Service data unit
Additional type 24 symbols and abbreviations 3.5
3.5.1ACK Acknowledge
3.5.2C1MSG C1 message
3.5.3C2MSG C2 message
3.5.4I/O Input and/or output
3.5.5MSG Message
3.5.6Rx Receive
3.5.7SDA Send data with acknowledge
3.5.8SDN Send data without acknowledge
3.5.9SM State machine
3.5.10Tcycle Transmission cycle
3.5.11Tslot Time slot
3.5.12Tx Transmit
IEC 61158-4-24:2014 © IEC 2014 – 17 –
Common Conventions 3.6This standard uses the descriptive conventions given in ISO/IEC 10731. The service model, service primitives, and time-sequence diagrams used are entirely abstract descriptions; they do not represent a specification for implementation. Service primitives, used to represent service user/service provider interactions (see
ISO/IEC 10731), convey parameters that indicate information available in the user/provider interaction. This standard uses a tabular format to describe the component parameters of the DLS primitives. The parameters that apply to each group of DLS primitives are set out in tables throughout the remainder of this standard. Each table consists of up to six columns, containing the name of the service parameter, and a column each for those primitives and parameter-transfer directions used by the DLS: – the request primitive’s input parameters; – the indication primitive’s output parameters. – the response primitive’s input parameters; and – the confirm primitive’s output parameters. NOTE The request, indication, response and confirm primitives are also known as requestor.submit acceptor.deliver
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