EN 62439-1:2010

SLOVENSKI STANDARD
01-maj-2010
1DGRPHãþD
SIST EN 62439:2008
,QGXVWULMVNDNRPXQLNDFLMVNDRPUHåMD]DDYWRPDWL]DFLMR]YLVRNRUD]SRORåOMLYRVWMR
GHO6SORãQLNRQFHSWLQPHWRGHL]UDþXQDYDQMD,(&
Industrial communication networks - High availability automation networks - Part 1:
General concepts and calculation methods (IEC 62439-1:2010 )
Industrielle Kommunikationsnetze - Hochverfügbare Automatisierungsnetze - Teil 1:
Grundlagen und Berechnungsmethoden (IEC 62439-1:2010 )
Réseaux de communication industrielle - Réseaux d’automatisme à haute disponibilité -
Partie 1 : Concepts généraux et méthodes de calcul (CEI 62439-1:2010 )
Ta slovenski standard je istoveten z: EN 62439-1:2010
ICS:
25.040.01 Sistemi za avtomatizacijo v Industrial automation
industriji na splošno systems in general
35.110 Omreževanje Networking
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62439-1
NORME EUROPÉENNE
March 2010
EUROPÄISCHE NORM
ICS 25.040; 35.040 Supersedes EN 62439:2008 (partially)

English version
Industrial communication networks -
High availability automation networks -
Part 1: General concepts and calculation methods
(IEC 62439-1:2010)
Réseaux de communication industrielle – Industrielle Kommunikationsnetze -
Réseaux d’automatisme à haute Hochverfügbare Automatisierungsnetze -
disponibilité – Teil 1: Grundlagen
Partie 1 : Concepts généraux et méthodes und Berechnungsmethoden
de calcul (IEC 62439-1:2010)
(CEI 62439-1:2010)
This European Standard was approved by CENELEC on 2010-03-01. 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, Croatia, 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: Avenue Marnix 17, B - 1000 Brussels

© 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62439-1:2010 E
Foreword
The text of document 65C/583/FDIS, future edition 1 of IEC 662439-1, 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 62439-1 on 2010-03-01.
This EN 62439-1 together with EN 62439-2, EN 62439-3, EN 62439-4, EN 62439-5 and EN 62439-6
supersedes EN 62439:2008.
This EN 62439-1:2010 includes the following significant technical changes with respect to
EN 62439:2008:
– adding a calculation method for RSTP (rapid spanning tree protocol, IEEE 802.1Q),
– adding two new redundancy protocols: HSR (High-availability Seamless Redundancy) and DRP
(Distributed Redundancy Protocol),
– moving former Clauses 1 to 4 (introduction, definitions, general aspects) and the Annexes (taxonomy,
availability calculation) to EN 62439-1, which serves now as a base for the other documents,
– moving Clause 5 (MRP) to EN 62439-2 with minor editorial changes,
– moving Clause 6 (PRP) was to EN 62439-3 with minor editorial changes,
– moving Clause 7 (CRP) was to EN 62439-4 with minor editorial changes, and
– moving Clause 8 (BRP) was to EN 62439-5 with minor editorial changes,
– adding a method to calculate the maximum recovery time of RSTP in a restricted configuration (ring)
to EN 62439-1 as Clause 8,
– adding specifications of the HSR (High-availability Seamless Redundancy) protocol, which shares the
principles of PRP to EN 62439-3 as Clause 5, and
– introducing the DRP protocol as EN 62439-6.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2010-12-01
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2013-03-01
with the EN have to be withdrawn
Annex ZA has been added by CENELEC.
__________
- 3 - EN 62439-1:2010
Endorsement notice
The text of the International Standard IEC 62439-1:2010 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 series NOTE  Harmonized in EN 61158 series (not modified).
IEC/TR 61158-1 NOTE  Harmonized as CLC/TR 61158-1.
IEC/TR 61158-6 series NOTE  Harmonized in EN 61158-6 series (not modified).
IEC 61784-2:2007 NOTE  Harmonized as EN 61784-2:2008 (not modified).
IEC 62439-2 NOTE  Harmonized as EN 62439-2.
IEC 62439-3 NOTE  Harmonized as EN 62439-3.
IEC 62439-4 NOTE  Harmonized as EN 62439-4.
IEC 62439-5 NOTE  Harmonized as EN 62439-5.
IEC 62439-6 NOTE  Harmonized as EN 62439-6.
IEC 61918:2007 NOTE  Harmonized as EN 61918:2008 (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

IEC 60050-191 1990 International Electrotechnical Vocabulary - -
(IEV) - Chapter 191: Dependability and quality
of service
IEC 61158 Series Fieldbus standard for use in industrial control EN 61158 Series
systems
IEC 61158-6-10 - Industrial communication networks - Fieldbus EN 61158-6-10 -
specifications -
Part 6-10: Application layer protocol
specification - Type 10 elements

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

IEEE 802.1D 2004 IEEE Standard for Local and Metropoitan - -
Area Networks - Media Access Control (MAC)
Bridges
IEEE 802.1Q - IEEE Standard for Local and Metropolitan - -
Area Networks - Virtual Bridged Local Area
Networks
IETF RFC 791 - Internet Protocol - DARPA Internet Program - -
Protocol Specification
IEC 62439-1 ®
Edition 1.0 2010-02
INTERNATIONAL
STANDARD
colour
inside
Industrial communication networks – High availability automation networks –
Part 1: General concepts and calculation methods

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XA
ICS 25.040, 35.040 ISBN 2-8318-1081-1
– 2 – 62439-1 © IEC:2010(E)
CONTENTS
FOREWORD.5
INTRODUCTION.7
1 Scope.8
2 Normative references .8
3 Terms, definitions, abbreviations, acronyms, and conventions.9
3.1 Terms and definitions .9
3.2 Abbreviations and acronyms.16
3.3 Conventions .17
3.3.1 General conventions.17
3.3.2 Conventions for state machine definitions.17
3.3.3 Conventions for PDU specification.17
3.4 Reserved network addresses .18
4 Conformance requirements (normative) .18
4.1 Conformance to redundancy protocols.18
4.2 Conformance tests .19
4.2.1 Concept.19
4.2.2 Methodology.19
4.2.3 Test conditions and test cases.20
4.2.4 Test procedure and measuring .20
4.2.5 Test report.20
5 Concepts for high availability automation networks (informative) .21
5.1 Characteristics of application of automation networks.21
5.1.1 Resilience in case of failure.21
5.1.2 Classes of network redundancy .22
5.1.3 Redundancy maintenance .22
5.1.4 Comparison and indicators .23
5.2 Generic network system .24
5.2.1 Network elements.24
5.2.2 Topologies.26
5.2.3 Redundancy handling .32
5.2.4 Network recovery time .32
5.2.5 Diagnosis coverage .32
5.2.6 Failures .32
5.3 Safety .34
5.4 Security.34
6 Classification of networks (informative) .34
6.1 Notation .34
6.2 Classification of robustness.35
7 Availability calculations for selected networks (informative) .35
7.1 Definitions .35
7.2 Reliability models .36
7.2.1 Generic symmetrical reliability model.36
7.2.2 Simplified symmetrical reliability model.38
7.2.3 Asymmetric reliability model .38
7.3 Availability of selected structures .39
7.3.1 Single LAN without redundant leaves .39

62439-1 © IEC:2010(E) – 3 –
7.3.2 Network without redundant leaves .40
7.3.3 Single LAN with redundant leaves .41
7.3.4 Network with redundant leaves .41
7.3.5 Considering second failures .42
7.4 Caveat .44
8 RSTP for High Availability Networks: configuration rules, calculation and
measurement method for deterministic recovery time in a ring topology .44
8.1 General .
...