IEC PAS 62410:2005

PUBLICLY
IEC
AVAILABLE
PAS 62410
SPECIFICATION
First edition
2005-08
Real-time Ethernet SERCOS III
Reference number
IEC/PAS 62410:2005(E)
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PUBLICLY
IEC
AVAILABLE
PAS 62410
SPECIFICATION
First edition
2005-08
Real-time Ethernet SERCOS III
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– 2 – PAS 62410 © IEC:2005(E)
CONTENTS
Foreword .3

Introduction .5

Section A – Update of IEC 61158-2 .7

Section B – Update of IEC 61158-3 .16
Section C – Update of IEC 61158-4.20
Section D – Update of IEC 61158-5.37
Section E – Update of IEC 61158-6 .54
Section F – Update of IEC 61784-2 .77

PAS 62410 © IEC:2005(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
Real-time Ethernet SERCOS III
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
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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
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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.

The International Electrotechnical Commission (IEC) draws attention to the fact that it is claimed that compliance
with this document may involve the use of a patent concerning SERCOS III.
The Interest Group SERCOS interface (IGS) has the patent applications listed below:
German Publication Number DE 102 37 097 A1.

IEC takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured the IEC that he is willing to negotiate licences under reasonable and non-
discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the holder
of this patent right is registered with IEC. Information may be obtained from:
Bosch Rexroth Electric Drives and Controls GmbH
Bürgem.-Dr.-Nebel-Str.2
97816 Lohr, Germany
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.
A PAS is a technical specification not fulfilling the requirements for a standard but made
available to the public .
IEC-PAS 62410 has been processed by subcommittee 65C: Digital communications, of IEC
technical committee 65: Industrial-process measurement and control.

– 4 – PAS 62410 © IEC:2005(E)
The text of this PAS is based on the This PAS was approved for

following document: publication by the P-members of the

committee concerned as indicated in
the following document
Draft PAS Report on voting
65C/358/NP 65C/374/RVN
Following publication of this PAS, the technical committee or subcommittee concerned will

transform it into an International Standard.

It is intended that the content of this PAS will be incorporated in the future new editions of the
various parts of the IEC 61158 series and IEC 61784 series according to the structure of
these series.
This PAS shall remain valid for an initial maximum period of three years starting from
2005-08. The validity may be extended for a single three-year period, following which it shall
be revised to become another type of normative document or shall be withdrawn.

PAS 62410 © IEC:2005(E) – 5 –
INTRODUCTION
This PAS relates to the integration of SERCOS III fieldbus specification in future editions of

IEC 61158 and IEC 61784 series.

It shows in various clauses what updates are required in each of these individual standards.

All definitions, abbreviations and symbols that relate to SERCOS III appear together in
Section F, which belongs to the updates of IEC 61784-2, as a temporary fix.

NOTE 1 Some sections of this PAS still refer to IEC 61491. As it has been decided to split this standard into

future IEC 61800 series, under consideration, (power drive systems) and IEC 61158/61784 series (communication)
according to 65C/365/RQ, references to these new standards will be incorporated later on, in accordance with the
relevant SC22G and SC65C working groups.
NOTE 2 For the reader who is unfamiliar with SERCOS interfaces, 17.3 of Section F can serve as a preface to the
specific details which follow in later clauses.
NOTE 3 A temporary "Type S" has been allocated for SERCOS III.
The SERCOS/CPF16 standard structure is described in the table below.
IEC 61784-1 Communication profiles CP16/1 and CP16/2.
(new edition)
CP16/1 fits to the existing SERCOS specification IEC
61491:2002 (fibre optic media, 2 and 4 Mbit/s). IEC 61491 (new
edition) shall not specify any communication and refer instead
to CP16/1 in IEC 61784-1 after release of its new edition
according to this structure proposal.
nd
CP16/2 fits to the 2 SERCOS generation (fibre optic media, 2,
4, 8 and 16 Mbit/s), which is downwards compatible to IEC
61491:2002 (CP16/1) while specifying additional features.
st
IEC 61784-2 (1 Communication profiles CP16/3.
edition)
CP16/3 fits to the newest, real-time Ethernet SERCOS Defined in the PAS.
generation, which is application compatible to IEC 61491:2002
(CP16/1) and CP16/2 while specifying additional
communication features.
IEC 61158-2 Physical layer specification for all CPF16 profiles (Type not yet known)
(new edition)
Type specifications for CP16/1 and CP16/2
Type specifications for CP16/3 Defined in the PAS

IEC 61158-3 Data Link layer service specification for all CPF16 profiles
(new edition) (Type not yet known)
Type specifications for CP16/1 and CP16/2
Type specifications for CP16/3 Defined in the PAS
IEC 61158-4 Data Link layer protocol specification for all CPF16 profiles
(new edition) (Type not yet known)
Type specifications for CP16/1 and CP16/2
Type specifications for CP16/3 Defined in the PAS

– 6 – PAS 62410 © IEC:2005(E)
IEC 61158-5 Application Link layer service specification for all CPF16 profiles

(new edition) (Type not yet known)

Type specifications for CP16/1 and CP16/2

Type specifications for CP16/3 Defined in the PAS

IEC 61158-6 Application Link layer protocol specification for all CPF16 profiles

(new edition) (Type not yet known)

Type specifications for CP16/1 and CP16/2
Type specifications for CP16/3 Defined in the PAS

PAS 62410 © IEC:2005(E) – 7 –
Section A – Update of IEC 61158-2

0 Introduction
0.5 Major Physical Layer variations specified in IEC 61158-2

0.5.1 Type S: optical media and twisted-pair wire

Type S specifies the following synchronous transmission:

a) optical fibre medium, at 2, 4, 8 and 16 Mbit/s;

b) twisted-pair wire medium, at 100 Mbit/s, according to ISO/IEC 8802-3 – 100Base-TX;
c) optical fibre medium, at 100 Mbit/s, according to ISO/IEC 8802-3 – 100Base-FX
2 Normative references
IEC 61491:2002, Electrical equipment of industrial machines – Serial data link for real-time
communication between controls and drives.
ISO/IEC 8802-3:2001, 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.
29 Type S: Medium Attachment Unit: Ethernet 100Base-TX and 100 Base-FX
29.1 Transfer medium part of physical layer
29.1.1 Basics
The physical layer of the SERCOS profile is according to ISO/IEC 8802-3. Therein the
transmission mode and the physical layer are specified. The transmission rate is 100 Mbit/s.
29.1.2 Topology
29.1.2.1 General
A SERCOS network uses slaves with integrated repeaters which have a constant delay time
(t , input Æ output). The topology consists of point-to-point transmission lines and
rep
participants. The master and the slaves are part of the network and are its participants. The
connection line between the participants is a shielded CAT5 (or better) cable.

Each participant has two communication ports (port 1 and port 2). Port 1 (P1) and port 2 (P2)
are interchangeable (see slave 3 in Figure 1 and Figure 2 for an example).
The topology can be either a ring structure or a line structure. A ring has two logical channels
(see Figure 1) and a line has only one logical channel (see Figure 2).
The difference between ring and line structure is that the ring has a built-in redundancy
against transmission media errors (e.g. cable break) and is therefore preferred.
A control unit may have one or more master interfaces depending on configu
...