SIST EN 61162-420:2004

SLOVENSKI STANDARD
01-september-2004
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Maritime navigation and radiocommunication equipment and systems - Digital interfaces
-- Part 420: Multiple talkers and multiple listeners - Ship systems interconnection -
Companion standard requirements and basic companion standards
Navigations- und Funkkommunikationsgeräte und -systeme für die Seeschifffahrt -
Digitale Schnittstellen -- Teil 420: Mehrere Datensender und mehrere Datenempfänger -
Schiffssystemzusammenschaltung - Anforderungen an Begleitnormen und
Basisbegleitnormen
Matériels et systèmes de navigation et de radiocommunications maritimes - Interfaces
numériques -- Partie 420: Emetteurs multiples et récepteurs multiples - Interconnexion
des systèmes embarqués - Exigences standard de la couche utilisateur et standard
utilisateurs de base
Ta slovenski standard je istoveten z: EN 61162-420:2002
ICS:
33.060.01 Radijske komunikacije na Radiocommunications in
splošno general
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 61162-420
NORME EUROPÉENNE
EUROPÄISCHE NORM February 2002
ICS 47.020.70
English version
Maritime navigation and radiocommunication equipment and systems -
Digital interfaces
Part 420: Multiple talkers and multiple listeners –
Ship systems interconnection –
Companion standard requirements and basic companion standards
(IEC 61162-420:2001)
Matériels et systèmes de navigation et Navigations- und Funkkommunikations-
de radiocommunications maritimes - geräte und -systeme für die Seeschifffahrt –
Interfaces numériques Digitale Schnittstellen
Partie 420: Emetteurs multiples et Teil 420: Mehrere Datensender und
récepteurs multiples – mehrere Datenempfänger -
Interconnexion des systèmes embarqués - Schiffssystemzusammenschaltung -
Exigences standard de la couche utilisateur Anforderungen an Begleitnormen und
et standard utilisateurs de base Basisbegleitnormen
(CEI 61162-420:2001) (IEC 61162-420:2001)
This European Standard was approved by CENELEC on 2002-02-01. 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, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland and 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
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61162-420:2002 E
Foreword
The text of document 80/312/FDIS, future edition 1 of IEC 61162-420, prepared by IEC TC 80,
Maritime navigation and radiocommunication equipment and systems, was submitted to the IEC-
CENELEC parallel vote and was approved by CENELEC as EN 61162-420 on 2002-02-01.
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) 2002-11-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2005-02-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annexes A, B, C, D, E, F and ZA are normative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 61162-420:2001 was approved by CENELEC as a
European Standard without any modification.
__________
- 3 - EN 61162-420:2002
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
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 61162-1 2000 Maritime navigation and EN 61162-1 2000
radiocommunication equipment and
systems - Digital interfaces
Part 1: Single talker and multiple
listeners
IEC 61162-2 1998 Part 2: Single talker and multiple EN 61162-2 1998
listeners, high-speed transmission
1)
IEC 61162-3 - Part 3: Serial data instrument network - -
2) 2)
IEC 61162-400 - Part 400: Multiple talkers and multiple EN 61162-400 -
listeners - Ship systems interconnection
- Introduction and general principles
2) 2)
IEC 61162-401 - Part 401: Multiple talkers and multiple EN 61162-401 -
listeners - Ship systems interconnection
- Application profile
ISO/IEC 8859-1 1998 Information technology - 8-bit single---
byte coded graphic character sets
Part 1: Latin alphabet No.1
1)
To be published.
2)
Undated reference.
INTERNATIONAL IEC
STANDARD
61162-420
First edition
2001-11
Maritime navigation and radiocommunication
equipment and systems –
Digital interfaces –
Part 420:
Multiple talkers and multiple listeners –
Ship systems interconnection –
Companion standard requirements
and basic companion standards
 IEC 2001  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
Commission Electrotechnique Internationale
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International Electrotechnical Commission
For price, see current catalogue

– 2 – 61162-420  IEC:2001(E)
CONTENTS
FOREWORD.6
INTRODUCTION.8
1 Scope and object .9
2 Normative references.10
3 Definitions .10
3.1 Terms and abbreviations .10
3.2 General typographical rules in this standard.12
4 General principles for the PCS.12
4.1 General structure.12
4.1.1 Purpose.12
4.1.2 Components of the PCSDL .12
4.1.3 Object based principles in the PCSDL .13
4.1.4 Generic and manufacturer specific companion standards .14
4.1.5 Generic companion standards (PFS).15
4.1.6 Manufacturer specific companion standards .15
4.1.7 Guidelines for using PCS .16
4.2 Products of the PCS .17
4.2.1 MAU name.17
4.2.2 Interface name.17
4.2.3 Interface class name.17
4.2.4 Data object name.18
4.2.5 Data object function .18
4.2.6 Data object structure.18
4.2.7 Data object information contents .18
4.2.8 Run-time library information items.18
4.2.9 PFS information items.19
4.3 The PISCES foundation specifications (PFS) .19
4.4 Generic interfaces in the PFS .19
5 The companion standard reference specification.19
5.1 Introduction .19
5.2 Basic concepts of the PCS.20
5.3 Conventions for companion standard specification files.21
5.3.1 General principles.21
5.3.2 Tokens .21
5.3.3 Name structure .23
5.3.4 Name scope .23
5.3.5 Configurable identifiers and literal .24
5.4 General structure of PCS specifications .24
5.4.1 General .24
5.4.2 The specification header .25
5.4.3 The specification body .26
5.5 Application specifications.26
5.5.1 Overview .26
5.5.2 General layout .26
5.5.3 Header .27
5.5.4 Body.28

61162-420  IEC:2001(E) – 3 –
5.6 Interface component specifications .30
5.6.1 Overview .30
5.6.2 General layout .31
5.6.3 Header specification .31
5.6.4 Body specification.32
5.7 Information specifications .33
5.7.1 Overview .33
5.7.2 General layout .33
5.7.3 Header .34
5.7.4 Body.34
5.8 Data types .35
5.8.1 Overview .35
5.8.2 General layout .35
5.8.3 Header .36
5.8.4 Body.36
6 PISCES foundation specification (PFS) .38
6.1 Introduction .38
6.2 Naming conventions .39
6.3 Application classes .39
6.3.1 Introduction .39
6.3.2 Application base class: PACApplication.40
6.3.3 LNA MAU application: PACLNA.40
6.3.4 Managed applications: PACFullApplication .40
6.3.5 IEC 61162-1 and IEC 61162-2 interface application: PACNMEARelay.40
6.3.6 Console application: PACConsole .40
6.3.7 General alarm and monitoring application: PACServerApp.40
7 Specification requirements for PCS compliant applications.41
7.1 Introduction and general documentation format.41
7.2 Function block .41
7.2.1 Function block graphical view.41
7.2.2 Physical effects.41
7.2.3 Input variables .41
7.2.4 Output variables .42
7.2.5 Events .42
7.2.6 Commands .42
7.2.7 Status.42
7.2.8 Parameters.42
7.2.9 Indication of accept or connect functionality .42
7.3 Functional description.42
7.4 Companion standard descriptions .43

– 4 – 61162-420  IEC:2001(E)
Annex A (normative) Defined keywords .44
Annex B (normative) Basic IEC 61162-4 data types .46
Annex C (normative) General application companion standards .47
C.1 Introduction and general principles.47
C.2 Functionality overview.47
C.2.1 General data definitions .47
C.2.2 Version codes.47
C.2.3 Manufacturer and model identification .47
C.2.4 Interface and MCP information.47
C.2.5 Authentication.47
C.2.6 File overview.48
C.2.7 Data types General .48
C.2.8 Application PACSimpleApplication.52
C.2.9 Application PACFullApplication .52
C.2.10 Interface PCCVersionCodes.53
C.2.11 Interface PCCApplicationInfo .54
C.2.12 Data types UserAuth .55
C.2.13 Interface PCCUserAuth.56
Annex D (normative) LNA-MAU companion standard .59
D.1 General principles.59
D.2 Companion standards.60
D.2.1 Data types LnaMau .60
D.2.2 Interface PCCLNAStats.62
Annex E (normative) General alarm and monitoring companion standards .64
E.1 Introduction and general principles.64
E.2 Alarm and monitoring system identifiers .64
E.3 Functionality overview.64
E.3.1 Companion standard for tag based monitoring and alarm system .64
E.3.2 Client-server architecture.65
E.3.3 Tag number .65
E.3.4 Tag sets .65
E.3.5 Tag information.65
E.3.6 Tag attributes .65
E.3.7 Tag data .65
E.3.8 Alarms.66
E.4 Application classes .66
E.5 Companion standard structure .67
E.6 File structure .67
E.7 Standard tag names .68
E.7.1 General .68
E.7.2 Structure of P tag name class .69
E.7.3 General structural rules.69
E.7.4 Main process codes .70
E.7.5 Process sub-codes .70
E.7.6 General sub-groups .70

61162-420  IEC:2001(E) – 5 –
E.7.7 Automation related sub-group .71
E.7.8 Navigation sub-groups .71
E.7.9 Data type indication group.71
E.7.10 Use of engineering units .72
E.7.11 Sequence number.72
E.8 Structure of standard tags (S class) .73
E.9 Structure of yard tags (Y class).73
E.10 Structure of internal tags (I class) .73
E.11 New tag name classes.73
E.12 General quality indicators .73
E.13 Certification .73
E.14 Time stamp .73
E.15 Validity flag.74
E.16 Authentication.74
E.17 Companion standard specifications.74
E.17.1 DATA TYPES TagData .74
E.17.2 Application PACReadableServer .80
E.17.3 Application PACWritableServer .80
E.17.4 Application PACAlarmSystem.81
E.17.5 Interface PCCTagDatabase .82
E.17.6 Interface PCCTagText .84
E.17.7 Interface PCCTagStream .85
E.17.8 Interface PCCTagNetsearch .86
E.17.9 Interface PCCTagAttributes .87
E.17.10 Interface PCCTagSubscribe.88
E.17.11 Interface PCCTagWrite.89
E.17.12 Interface PCCTagAlarm.90
E.17.13 Interface PCCTagSet.91
E.17.14 Interface PCCTagAttributeWrite.92
Annex F (normative) Navigational interfaces.94
F.1 IEC 61162-1 relay function.94
F.2 Interface PCCNMEAIn .94
F.2.1 READ NoOfPorts .94
F.2.2 FUNCTION GetPortDescription .94
F.2.3 FUNCTION NoOfSentences .94
F.2.4 FUNCTION GetListOfSentences .94
F.2.5 FUNCTION GetSentence .94
F.2.6 SUBSCRIBE Port_ .95
F.2.7 SUBSCRIBE Port__.95
F.3 Interface PCCNMEAOut.95
F.3.1 READ NoOfPorts .95
F.3.2 FUNCTION GetPortDescription .95
F.3.3 NONACKED-WRITE Port_ .95
F.4 The IEC 61162-1/2 related companion standard documents .96
F.4.1 The IEC 61162-1/2 data type description.96
F.4.2 Description of Interface PCCNMEAIn .97
F.4.3 Description of Interface PCCNMEAOut. 100
F.4.4 Application Description . 101

– 6 – 61162-420  IEC:2001(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS –
DIGITAL INTERFACES –
Part 420: Multiple talkers and multiple listeners –
Ship systems interconnection – Companion standard requirements
and basic companion standards
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical specifications, technical reports or guides and they are accepted by the National
Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61162-420 has been prepared by IEC technical committee 80:
Maritime navigation and radiocommunication equipment and systems.
The text of this standard is based on the following documents:
FDIS Report on voting
80/312/FDIS 80/327/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 3.
The special typographical conventions and nomenclature used in this standard are defined in
IEC 61162-400 annex A.
Annexes A, B, C, D, E and F form an integral part of this standard.

61162-420  IEC:2001(E) – 7 –
The committee has decided that the contents of this publication will remain unchanged until
June, 2005. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 8 – 61162-420  IEC:2001(E)
INTRODUCTION
International Standard IEC 61162 is a four part standard which specifies four digital interfaces
for applications in marine navigation, radiocommunication and system integration.
The four parts are:
IEC 61162-1 Single talker and multiple listeners
IEC 61162-2 Single talker and multiple listeners, high speed transmission
IEC 61162-3 Multiple talkers and multiple listeners – Serial data instrument network
IEC 61162-4 Multiple talkers and multiple listeners – Ship systems interconnection. Part 4 of
this standard is sub-divided into a number of individual standards with part
numbers in the 400 series.
IEC 61162-420 contains the specification of a description language for IEC 61162-4 series
companion standards (user layer specifications), a framework for the organization of such
companion standard descriptions and also the descriptions of basic components that can be
used as a starting point to build IEC 61162-4 series components and networks.
Later standards in the companion standard series (IEC 61162-42x) are expected to address
more concrete interface requirements for specific navigational equipment.
Relationship with the other parts of the IEC 61162 series of standards is defined in annex B to
IEC 61162-400.
61162-420  IEC:2001(E) – 9 –
MARITIME NAVIGATION AND RADIOCOMMUNICATION
EQUIPMENT AND SYSTEMS –
DIGITAL INTERFACES –
Part 420: Multiple talkers and multiple listeners –
Ship systems interconnection – Companion standard requirements
and basic companion standards
1 Scope and object
International Standard IEC 61162-420 specifies the requirement for and basic components of
the IEC 61162-4 series companion standards. These components are referred to as follows:
a) PCS (PISCES companion standards) which contain the rules for creation of companion
standards. The general principles underlying the PCS are described in clause 4.
b) PCSDL (PCS description language). Part of the PCS is the definition of the syntax for the
various types of companion standard documents that make them readable by computer
tools. The PCSDL is described in clause 5.
c) function block description. The function block description is a high level and graphical
description of applications using the IEC 61162-4 series interface standard. The function
block syntax is specified in clause 7.
d) PFS (PISCES foundation specifications) which contain a framework for classification of
applications adhering to the IEC 61162-4 standard. The PFS will also provide a minimum
level of interoperability between different manufacturers’ applications using this framework.
The PFS is described in clause 6.
Clause 5 contains the complete reference to the PCS description language. Subclause 5.2
explains the basic concept of the PCS which is given by the distinction between four types of
specifications: applications, interfaces, information and data types. General conventions with
respect to the syntax of the PCS can be found in 5.3. All PCS documents are based on a
similar structure. This approach is intended to make it easier to become familiar with the
syntax and semantics of the PCS which is defined in 5.3.1. The four subclauses thereafter
explain in detail the syntax and semantics of the four different types of specifications generated
by the PCS.
Clause 6 describes the relationship between the different classes of IEC 61162-4 applications
and gives an overview of their functionality. The annexes contain the detailed PCS definitions
for the classes.
The objective of companion standards is to provide definitions of the information that is
transferred within an integrated ship control system and of how these information items can be
accessed or provided. Furthermore, the standard shall allow the definition of the actual network
interfaces which the applications use to connect to the system. The description format is
machine-readable, allowing an automatic compilation of the description into interface software.
A companion standard allows the reader to, at will, shift the focus between a technical
specification and a definition of interfaces and information items. The development team can
determine information attributes like unit, power, accuracy and the structure of the system
architecture and create a common interpretation basis for data before the system
implementation. The formalisms underlying the specification language will at the same time
provide an unambiguous and precise description of the equipment interfaces which allow the
use of computer tools to automatically generate interface program codes or to inspect and
manipulate interfaces on-line, for example for debugging and monitoring purposes.

– 10 – 61162-420  IEC:2001(E)
2 Normative references
The following normative documents contain provisions, which, through reference in this text,
constitute provisions of this part of IEC 61162. For dated references, subsequent amendments
to, or revisions of, any of these publications do not apply. However, parties to agreements
based on this part of IEC 61162 are encouraged to investigate the possibility of applying the
most recent editions of the normative documents indicated below. For undated references, the
latest edition of the normative document referred to applies. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 61162-1:2000, Maritime navigation and radiocommunication equipment and systems –
Digital interfaces – Part 1: Single talker and multiple listeners
IEC 61162-2:1998, Maritime navigation and radiocommunication equipment and systems –
Digital interfaces – Part 2: Single talker and multiple listeners, high speed transmissiion
IEC 61162-3, Maritime navigation and radiocommunication equipment and systems – Digital
interfaces – Part 3: Multiple talkers and multiple listeners – Serial data instrument network
IEC 61162-400, Maritime navigation and radiocommunication equipment and systems – Digital
interfaces – Part 400: Multiple talkers and multiple listeners – Ship systems interconnection –
Introduction and general principles
IEC 61162-401, Maritime navigation and radiocommunication equipment and systems – Digital
interfaces – Part 401: Multiple talkers and multiple listeners – Ship systems interconnection –
Application profile
ISO/IEC 8859-1:1998, Information technology – 8-bit single-byte coded graphic character sets
– Part 1: Latin alphabet No. 1
3 Definitions
For the purpose of this part of IEC 61162, the following definitions apply.
3.1 Terms and abbreviations
3.1.1
abstract specification
PCS specifications that are part of the PFS (defined in this standard) are not intended for direct
implementation and are termed “abstract”
3.1.2
application interface
a collection of interface components instantiated in an application definition document as one
protocol level interface
___________
To be published.
61162-420  IEC:2001(E) – 11 –
3.1.3
CP – connection point
an application interface consists of a number of individual “functions” that can be called into or
out from
3.1.4
CS – companion standard
a protocol layer on top of the normal OSI application level (see definition of companion
standard in IEC 61162-400), representing the definition of how the application layer
functionality is used to implement a certain application’s interface functionality. Also called user
layer
3.1.5
function block
a high level, partly graphical representation of an application’s place in an integrated system
which presents all interfaces and relationships between these on an overview level
3.1.6
interface (component)
a collection of connection points (CP) in one INTERFACE definition document. It can be
aggregated with others into an actual interface as defined in the A-profile. The actual interface
(A-profile sense) is defined as the application interface in the APPLICATION document
3.1.7
NMEA
the National Marine Electronics Association (NMEA) maintains a protocol standard called
NMEA 0183 that is almost identical to IEC 61162-1 and IEC 61162-2. For historical reasons,
symbolic names in some of the PCS documents in this standard refers to NMEA instead of to
IEC 61162-1 (annex F). Although references to NMEA are made, the PCS documents define an
application that is intended for use together with the IEC 61162-1 and IEC 61162-2 standards.
It can also be useful for transmittal of NMEA 0183 messages, but this is outside the scope of
this standard.
3.1.8
PCS – PISCES companion standard
the complete concept, including description language (PCSDL), function blocks and the
foundation classes (PFS)
3.1.9
PCSDL – PISCES companion standard description language
the formal interface description language for PCS
3.1.10
PFS – PISCES foundation specifications
the interface base classes for all applications created in the framework of the PCS
3.1.11
tangible
a specification of an entity that shall be implemented (instantiated) at some time

– 12 – 61162-420  IEC:2001(E)
3.2 General typographical rules in this standard
The following typographical rules apply throughout this standard:
a) fragments and complete pieces of PCSDL source code is written in Courier;
b) tokens written in capitals, typeset in COURIER are reserved PCSDL keywords;
c) words in angle brackets (elbows), '<' and '>', define place-holders that have to be filled
with the appropriate token as described in the text;
d) tokens in square brackets, '[' and ']', define tokens that are optional, for example parts
of a statement that are only required under special circumstances;
e) ellipses, ., show that the preceding item can be repeated.
Subclause 5.3 defines other typographical and lexical conventions that apply to PCSDL
documents.
4 General principles for the PCS
4.1 General structure
4.1.1 Purpose
The main purpose of the PCS is to give an unambiguous way to interpret data transmitted via
the IEC 61162-401 A-profile protocol. In this sense, the companion standard adds meaning to
the data transmitted via the protocol, converts it to information and makes it usable for
application modules connected to the network. To serve this purpose, the PCS shall provide
the following:
a) establish a language to define information types, application interfaces and applications.
This language has to be human readable as well as interpretable by a computer. this
language is the PCSDL;
b) provide a standardized set of information types and interfaces which can be used as a
basis to create customized (i.e. vendor specific) application and interface descriptions. This
set of specifications is the PFS, see 4.4;
c) provide a general framework for a high level description of applications that use the
IEC 61162-4 standard for communication. This is the function block specification format.
4.1.2 Components of the PCSDL
The PCSDL supports the generation of four different types of specifications as outlined in the
following subclauses.
The three first document types can be used to generate protocol (A-profile) related entities, for
example data object names, MAU names and format strings. The information specification can
be used to add more application related meaning to the information entities. The information
specifications can also use an extended format string syntax to implement higher level
functionality based on the A-profile specification.
4.1.2.1 Application
Representation of application units within the PCS. An application is defined by application
interfaces specifying the respective inputs and/or outputs. The application specification can be
looked at as the specification of how one particular piece of equipment is connected to the
system. Applications will normally consist of a number of interfaces configured as either
providing data to or using data from the system.

61162-420  IEC:2001(E) – 13 –
4.1.2.2 Interface (component)
Specification of connection mechanisms used between applications. Each interface has one or
more connection points (CP). Each connection point specifies one or more information type
received or provided by the respective interface. The connection point specification consists of
the data structures transferred, the information the data structures carry and how the
information can be accessed (read, write, etc.).
4.1.2.3 Data type
Data type definition specifies the structure and to some degree the content of data transmitted
via the IEC 61162-4 network. This document can be optionally exchanged or complemented
with information specifications.
4.1.2.4 Information
An information specification represents and defines the content and interpretation of data
transmitted via the IEC 61162-4 network. The purpose of these specifications is to define the
format of exchanged data and specify the usage of the respective information. This type of
d
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