EN 61158-4-19:2008

SLOVENSKI STANDARD
01-junij-2008
1DGRPHãþD
SIST EN 61158-4:2004
Industrijska komunikacijska omrežja - Specifikacije za procesna vodila - 4-19. del:
Specifikacija protokola na nivoju podatkovnih povezav - Elementi tipa 19 (IEC
61158-4-19:2007)
Industrial communication networks - Fieldbus specifications -- Part 4-19: Data-link layer
protocol specification - Type 19 elements
Industrielle Kommunikationsnetze - Feldbusse - Teil 4-19: Protokollspezifikation des
Data Link Layer (Sicherungsschicht) - Typ 19-Elemente
Réseaux de communication industriels - Spécifications des bus de terrain - Partie 4-19:
Spécification des protocoles des couches de liaison de données - Eléments de type 19
Ta slovenski standard je istoveten z: EN 61158-4-19:2008
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 61158-4-19
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 4-19: Data-link layer protocol specification -
Type 19 elements
(IEC 61158-4-19:2007)
Réseaux de communication industriels -  Industrielle Kommunikationsnetze -
Spécifications des bus de terrain - Feldbusse -
Partie 4-19: Spécification des protocoles Teil 4-19: Protokollspezifikation des
des couches de liaison de données - Data Link Layer (Sicherungsschicht) -
Eléments de type 19 Typ 19-Elemente
(CEI 61158-4-19:2007) (IEC 61158-4-19:2007)

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 61158-4-19:2008 E
Foreword
The text of document 65C/474/FDIS, future edition 1 of IEC 61158-4-19, 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 61158-4-19 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 19 and possibly other types:
DE 102 37 097  [RI] Korrektur von Signallaufzeiten in verteilten Kommunikationssystemen
DE 102 00 405 0416.4-42 [RI] Verfahren zur Synchronisation in einem redundanten Kommunikationssystem
DE 102 00 502 4759.8-32 [RI] Verfahren zur Laufzeitkorrektur in einer Kommunikationsstruktur
DE 102 00 4056364.0-31 [RI] Verfahren zum Betreiben eines Netzwerks mit Ringtopologie
DE 103 12 907.3-31 [RI] Kommunikationssystem mit redundanter Kommunikation
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:
[RI] Rexroth Indramat GmbH
Bgm.-Dr.-Nebel-Str. 2
D - 97816 Lohr
Germany
Attention is drawn to the possibility that some of the elements of this standard may be the subject of patent rights other than those
identified above. IEC and CENELEC shall not be held responsible for identifying any or all such patent rights.
Annex ZA has been added by CENELEC.
__________
- 3 - EN 61158-4-19:2008
Endorsement notice
The text of the International Standard IEC 61158-4-19:2007 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 61158-3-19 NOTE  Harmonized as EN 61158-3-19:2008 (not modified).
IEC 61158-5-16 NOTE  Harmonized as EN 61158-5-16:2008 (not modified).
IEC 61158-5-19 NOTE  Harmonized as EN 61158-5-19:2008 (not modified).
IEC 61158-6-16 NOTE  Harmonized as EN 61158-6-16:2008 (not modified).
IEC 61158-6-19 NOTE  Harmonized as EN 61158-6-19:2008 (not modified).
IEC 61784-2 NOTE  Harmonized as EN 61784-2:2008 (not modified).
__________
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

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

1) 2)
IEC 61158-4-16 - Industrial communication networks - EN 61158-4-16 2008
Fieldbus specifications -
Part 4-16: Data-link layer protocol
specification -
Type 16 elements
3)
IEC 61800-7-20x (all Adjustable speed electrical power drive EN 61800-7-20x (all
sub- systems - Adjustable speed electrical power sub-
parts) drive systems - parts)
Part 7-20x: Generic interface and use of
profiles for power drive 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 8802-3 - 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.
3)
At present, these subparts are IEC 61800-7-201, 7-202, 7-203 and 7-204.

IEC 61158-4-19
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
Industrial communication networks – Fieldbus specifications –
Part 4-19: Data-link layer protocol specification – Type 19 elements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XB
ICS 35.100.20; 25.040.40 ISBN 2-8318-9443-3

– 2 – 61158-4-19 © IEC:2007(E)
CONTENTS
FOREWORD.6
INTRODUCTION.8
1 Scope.9
1.1 General .9
1.2 Specifications.9
1.3 Procedures.9
1.4 Applicability.9
1.5 Conformance.9
2 Normative references .10
3 Terms, definitions, symbols, abbreviations and conventions .10
3.1 Reference model terms and definitions.10
3.2 Additional Type 19 terms and definitions .10
3.3 Symbols .13
3.4 Abbreviations .14
3.5 Additional conventions .15
4 DL-protocol overview.15
5 DLPDU structure .17
5.1 Overview .17
5.2 General DLPDU identification.17
5.3 General DLPDU structure.17
5.4 DLPDU header .18
5.5 MDT DLPDU .19
5.6 AT DLPDU .28
6 DL management .38
6.1 Overview .38
6.2 Enable and disable cyclic communication .38
6.3 Hot-plug procedure.43
6.4 Status procedures .44
7 Data transmission methods .44
7.1 Overview .44
7.2 SVC .45
7.3 RTC .45
8 Telegram timing and DLPDU handling .45
8.1 Usage of real-time channel with different network topologies.45
8.2 Communication mechanisms .46
8.3 Device synchronization.52
9 Error handling and monitoring .53
9.1 Failure of telegrams .53
9.2 Response to MDT and AT telegram failure .53
9.3 Service channel error messages.53
Annex A (Normative) – IDN – Identification numbers.55
A.1 IDN specification .55
A.2 Identification numbers in numerical orders .55
A.3 Detailed specification of communication-related IDNs .56
Bibliography.74

61158-4-19 © IEC:2007(E) – 3 –
Figure 1 – Valid MDT and AT telegram combinations .16
Figure 2 – Offsets within MDT payload.23
Figure 3 – Offsets within AT payload.32
Figure 4 – Communication phase transitions.39
Figure 5 – Block diagram of master and slave.46
Figure 6 – Telegram sequence.48
Figure 7 – Beginning of telegram .49
Figure 8 – Access to the medium .50
Figure 9 – Timing diagram of CP0.52
Figure 10 – Timing diagram of CP1 and CP2 .52
Figure 11 – Synchronization timing .53
Figure 12 – Synchronization signal generation.53
Figure A.1 – Lengths of MDTs (example) .61
Figure A.2 – Lengths of ATs (example) .63
Figure A.3 – Structure of MAC address.67
Figure A.4 – Structure of IP address .68
Figure A.5 – Structure of subnet mask .69
Figure A.6 – Structure of gateway address .70

Table 1 – Ethernet DLPDU identification .17
Table 2 – Data structure in a DLPDU .17
Table 3 – DLPDU payload header.18
Table 4 – DLPDU type .18
Table 5 – MDT MST header .19
Table 6 – MDT MST fields to be considered by the slave .19
Table 7 – MDT phase.19
Table 8 – MDT0 in CP0.20
Table 9 – MDT0 in CP1 and CP2 .22
Table 10 – MDT1 in CP1 and CP2 .22
Table 11 – MDT data field.23
Table 12 – MDT hot-plug field in HP0 and HP1 .24
Table 13 – MDT hot-plug field in HP2 .24
Table 14 – Device address field .24
Table 15 – HP control field (in HP0 and HP1) .25
Table 16 – MDT service channel field .26
Table 17 – MDT SVC (for each slave) .26
Table 18 – SVC control word (DLL).27
Table 19 – MDT real-time data field .28
Table 20 – MDT real-time data (for each device).28
Table 21 – Device control field.28
Table 22 – AT MST header .29
Table 23 – AT MST fields to be considered by the slave .29
Table 24 – AT0 structure in CP0 .30

– 4 – 61158-4-19 © IEC:2007(E)
Table 25 – AT0 in CP1 and CP2 .30
Table 26 – AT1 in CP1 and CP2 .31
Table 27 – AT data field.31
Table 28 – AT hot-plug field in HP0 and HP1 .32
Table 29 – AT hot-plug field in HP2 .32
Table 30 – HP status field (in HP0 and HP1).33
Table 31 – AT service channel field .34
Table 32 – AT SVC (for each slave).34
Table 33 – AT SVC status description (DLL) .34
Table 34 – AT real-time data field .35
Table 35 – AT MS data field.36
Table 36 – AT MS data (for each device) .36
Table 37 – Device status field .36
Table 38 – CC data field .37
Table 39 – CC data field producer .37
Table 40 – CC consumer control.37
Table 41 – Synchronization classes of master and slave.49
Table 42 – Telegram transmission in RT and NR channels .51
Table A.1 – List of relevant communication-related IDNs .55
Table A.2 – Attributes of IDN S-0-1001 .57
Table A.3 – Attributes of IDN S-0-1002 .57
Table A.4 – Attributes of IDN S-0-1005 .58
Table A.5 – Attributes of IDN S-0-1006 .58
Table A.6 – Attributes for IDN S-0-1007.59
Table A.7 – Attributes for IDN S-0-1008.59
Table A.8 – Attributes of IDN S-0-1009 .60
Table A.9 – RTC-Offset in MDT .60
Table A.10 – Attributes of IDN S-0-1010 .61
Table A.11 – Attributes of IDN S-0-1011 .61
Table A.12 – RTC Offset in AT.62
Table A.13 – Attributes of IDN S-0-1012 .62
Table A.14 – Attributes of IDN S-0-1013 .63
Table A.15 – RTC Offset in MDT.63
Table A.16 – Attributes of IDN S-0-1014 .64
Table A.17 – RTC Offset in AT.64
Table A.18 – Attributes of IDN S-0-1015 .65
Table A.19 – Attributes of IDN S-0-1016 .65
Table A.20 – Attributes of IDN S-0-1017 .66
Table A.21 – Attributes of IDN S-0-1018 .66
Table A.22 – Attributes of IDN S-0-1019 .67
Table A.23 – Attributes of IDN S-0-1020 .68
Table A.24 – Attributes of IDN S-0-1021 .68
Table A.25 – Attributes of IDN S-0-1022 .69

61158-4-19 © IEC:2007(E) – 5 –
Table A.26 – Attributes of IDN S-0-1023 .70
Table A.27 – Structure of IDN S-0-1023 data .70
Table A.28 – Attributes of IDN S-0-1024 .71
Table A.29 – Attributes of IDN S-0-1025 .71
Table A.30 – Attributes of IDN S-0-1026 .72
Table A.31 – Attributes of IDN S-0-1028 .72
Table A.32 – Attributes of IDN S-0-1029 .73
Table A.33 – Attributes of IDN S-0-1030 .73

– 6 – 61158-4-19 © IEC:2007(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 4-19: Data-link layer protocol specification – Type 19 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 19 and possibly other Types:
DE 102 37 097 [RI] Korrektur von Signallaufzeiten in verteilten
Kommunikationssystemen
DE 102 00 405 0416.4-42 [RI] Verfahren zur Synchronisation in einem redundanten
Kommunikationssystem
DE 102 00 502 4759.8-32 [RI] Verfahren zur Laufzeitkorrektur in einer Kommunikationsstruktur
DE 102 00 4056364.0-31 [RI] Verfahren zum Betreiben eines Netzwerks mit Ringtopologie
DE 103 12 907.3-31 [RI] Kommunikationssystem mit redundanter Kommunikation
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:

61158-4-19 © IEC:2007(E) – 7 –
[RI]    Rexroth Indramat GmbH
Bgm.-Dr.-Nebel-Str. 2
D - 97816 Lohr
Germany
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 61158-4-19 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
companion Type 19 parts also cancel and replace IEC PAS 62410, 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.

– 8 – 61158-4-19 © IEC:2007(E)
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.

61158-4-19 © IEC:2007(E) – 9 –
INDUSTRIAL COMMUNICATION NETWORKS –
FIELDBUS SPECIFICATIONS –
Part 4-19: Data-link layer protocol specification – Type 19 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) 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.
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 part of this standard does not contain tests to demonstrate compliance with
such requirements.
– 10 – 61158-4-19 © IEC:2007(E)
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 61158-4-16, Industrial communications networks – Fieldbus specifications – Part 4-16:
Data-link layer protocol specification – Type 16 elements
IEC 61800-7-20x (all subparts), Adjustable speed electrical power drive systems – Part 7-20x:
Generic interface and use of profiles for power drive systems – Profile type x specification
ISO/IEC 7498-1, Information technology – Open Systems Interconnection – Part 1: Basic
Reference Model: The Basic Model
ISO/IEC 7498-3, Information technology – Open Systems Interconnection – Part 3: Basic
Reference Model: Naming and addressing
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
3 Terms, definitions, symbols, abbreviations and conventions
For the purposes of this document, the following terms, definitions, symbols, abbreviations
and conventions 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:
3.2 Additional Type 19 terms and definitions
3.2.1
broadcast
transmission to all devices in a network without any acknowledgment by the receivers
3.2.2
communication cycle
fixed time period between two master synchronization telegrams in which real-time telegrams
are transmitted in the RT channel and non real-time telegrams are transmitted in the IP
channel
3.2.3
control unit
control device (e.g., a PLC as specified in the IEC 61131 standard family)
3.2.4
control word
two adjacent OCTETs inside the master data telegram containing commands for the
addressed device
At present, these subparts are IEC 61800-7-201, 7-202, 7-203 and 7-204.

61158-4-19 © IEC:2007(E) – 11 –
3.2.5
cross communication
direct data transfer between slave devices (without active involvement of master)
3.2.6
cycle time
duration of a communication cycle
3.2.7
cyclic communication
periodic exchange of telegrams
3.2.8
cyclic data
part of a telegram, which does not change its meaning during cyclic operation of the network
3.2.9
cyclic operation
operation in which devices in the communication network are addressed and queried one after
the other at fixed, constant time intervals
3.2.10
device
a slave in the communication network, (e.g., a power drive system as defined in the IEC
61800 standard family, I/O stations as defined in the IEC 61131 standard family)
3.2.11
device address field
address field (eight bits) containing the address of the device
3.2.12
device control
four adjacent OCTETs inside the master data telegram containing commands for each device
3.2.13
device status
four adjacent OCTETs inside the acknowledge telegram containing status information for each
device
3.2.14
DLE station identifier
network address assigned to a DLE
3.2.15
DLE station slot
unit (granularity of one) of position dependent mapping (for cyclic data field) of which a DLE
may occupy one or more, delineated by the range beginning at the DLE station identifier with
a length equal to the configured number of occupied slots
3.2.16
element
part of IDNs – each IDN has 7 elements, whereas each one has a specific meaning (e.g.,
number, name, data)
3.2.17
EtherType
part of the Type 19 specific telegram header

– 12 – 61158-4-19 © IEC:2007(E)
3.2.18
forwarding
mode by which a device passes on a received telegram to the other port, either changed or
unchanged
3.2.19
identification number (IDN)
designation of operating data under which a data block is preserved with its attribute, name,
unit, minimum and maximum input values, and the data
3.2.20
line, line structure
network topology, in which the transmission medium is routed from station to station in the
form of a line; the information is transmitted in one direction from the master down to the last
slave in the line, and then flows back to the master via all the slaves in the reverse order
(CP16/3)
3.2.21
loopback
mode by which a device passes on a received telegram to the same port and to the other port,
either changed or unchanged
3.2.22
master
node, which assigns the other nodes (i.e., slaves) the right to transmit
3.2.23
master data telegram (MDT)
telegram, in which the master inserts its data
3.2.24
master DLE
DLE that performs the functions of network master
3.2.25
master synchronization telegram (MST)
telegram, or part of a telegram, in which the master inserts a time synchronization signal
3.2.26
MDT0 telegram
telegram, in which the master transmits its synchronization data, as well as parts or all of its
real-time data, to the slaves
3.2.27
participant
node
3.2.28
physical layer
first layer of the ISO-OSI reference model
3.2.29
protocol
convention about the data formats, time sequences, and error correction in the data exchange
of communication systems
61158-4-19 © IEC:2007(E) – 13 –
3.2.30
real-time data
part of the telegram that does not change its meaning during cyclic operation of the interface
3.2.31
RT channel
defined time slot within the communication cycle, which passes the CPF16 real-time
telegrams
3.2.32
service channel (SVC)
non real-time transmission of information upon master request during RT channel
3.2.33
slave
node, which is assigned the right to transmit by the master
3.2.34
slave DLE
DLE that performs the functions of network slave
3.2.35
station
node
3.2.36
status word
two adjacent OCTETs inside the acknowledge telegram containing status information of a
device
3.2.37
S-0-nnnn
designation of IDNs
3.2.38
telegram
DLPDU
3.2.39
topology
physical network architecture with respect to the connection between the stations of the
communication system
3.3 Symbols
3.3.1 ADR
device address (1 ≤ ADR ≤ 254) adjusted directly on the device e.g., using
a selector switch
3.3.2 AT MST header in AT
3.3.3 AT0.3 acknowledge telegrams
3.3.4 INFO service channel inf
...