Industrial-process measurement, control and automation - Evaluation of system properties for the purpose of system assessment - Part 4: Assessment of system performance

Covers the method to be used to systematically assess the performance of industrial-process measurement and control systems.

Leittechnik für industrielle Prozesse - Ermittlung der Systemeigenschaften zum Zweck der Eignungsbeurteilung eines Systems - Teil 4: Eignungsbeurteilung des Systembetriebsverhaltens

Mesure, commande et automation dans les processus industriels - Appréciation des propriétés d'un système en vue de son évaluation - Partie 4: Évaluation des caractéristiques de fonctionnement d’un système

L'IEC 61069-4:2016 spécifie la méthode d'évaluation détaillée des caractéristiques de fonctionnement d'un système de commande de base (BCS) reposant sur les principes de base de l'IEC 61069-1 et la méthodologie de l'IEC 61069-2; définit la classification de base des propriétés des caractéristiques de fonctionnement; décrit les facteurs ayant une influence sur les caractéristiques de fonctionnement et qui doivent être pris en compte lors de l'appréciation des caractéristiques de fonctionnement; donne des lignes directrices concernant les techniques de sélection à partir d'un ensemble d'options (avec références) pour l'appréciation des caractéristiques de fonctionnement. Cette deuxième édition annule et remplace la première édition parue en 1997. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - Réorganisation des informations contenues dans l'IEC 61069-4:1997 visant à mieux organiser l'ensemble complet de normes et à le rendre plus cohérent; - L'IEC TS 62603-1:2014 a été incorporée dans cette édition.

Meritve, krmiljenje in avtomatizacija v industrijskih procesih - Ocenjevanje lastnosti sistema zaradi njegovega vrednotenja - 4. del: Vrednotenje zmogljivosti sistema (IEC 61069-4:2016)

Opisuje metodo za sistematično vrednotenje delovanja sistemov za merjenje in krmiljenje v industrijskih procesih.

General Information

Status
Published
Publication Date
10-Nov-2016
Technical Committee
Drafting Committee
Current Stage
6060 - Document made available
Due Date
24-Jan-2017

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SLOVENSKI STANDARD
SIST EN 61069-4:2017
01-maj-2017
1DGRPHãþD
SIST EN 61069-4:1998
Meritve, krmiljenje in avtomatizacija v industrijskih procesih - Ocenjevanje

lastnosti sistema zaradi njegovega vrednotenja - 4. del: Vrednotenje zmogljivosti

sistema (IEC 61069-4:2016)
Industrial-process measurement, control and automation - Evaluation of system
properties for the purpose of system assessment - Part 4: Assessment of system
performance (IEC 61069-4:2016)

Leittechnik für industrielle Prozesse - Ermittlung der Systemeigenschaften zum Zweck

der Eignungsbeurteilung eines Systems - Teil 4: Eignungsbeurteilung des
Systembetriebsverhaltens (IEC 61069-4:2016)
Mesure, commande et automation dans les processus industriels - Appréciation des
propriétés d'un système en vue de son évaluation - Partie 4: Évaluation des
caractéristiques de fonctionnement d'un système (IEC 61069-4:2016)
Ta slovenski standard je istoveten z: EN 61069-4:2016
ICS:
25.040.40 Merjenje in krmiljenje Industrial process
industrijskih postopkov measurement and control
35.240.50 Uporabniške rešitve IT v IT applications in industry
industriji
SIST EN 61069-4:2017 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61069-4:2017
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SIST EN 61069-4:2017
EUROPEAN STANDARD EN 61069-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2016
ICS 25.040.40 Supersedes EN 61069-4:1997
English Version
Industrial-process measurement, control and automation -
Evaluation of system properties for the purpose of system
assessment - Part 4: Assessment of system performance
(IEC 61069-4:2016)

Mesure, commande et automation dans les processus Leittechnik für industrielle Prozesse - Ermittlung der

industriels - Appréciation des propriétés d'un système en Systemeigenschaften zum Zweck der Eignungsbeurteilung

vue de son évaluation - Partie 4: Évaluation des eines Systems - Teil 4: Eignungsbeurteilung des

caractéristiques de fonctionnement d'un système Systembetriebsverhaltens
(IEC 61069-4:2016) (IEC 61069-4:2016)

This European Standard was approved by CENELEC on 2016-07-20. 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

© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 61069-4:2016 E
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SIST EN 61069-4:2017
EN 61069-4:2016
European foreword

The text of document 65A/792/FDIS, future edition 2 of IEC 61069-4, prepared by SC 65A “System

aspects” of IEC/TC 65 “Industrial-process measurement, control and automation” was submitted to the

IEC-CENELEC parallel vote and approved by CENELEC as EN 61069-4:2016.
The following dates are fixed:
(dop) 2017-05-11
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2019-11-11
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61069-4:1997.

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.
Endorsement notice

The text of the International Standard IEC 61069-4:2016 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 60359 NOTE Harmonized as EN 60359.
IEC 60546-1 NOTE Harmonized as EN 60546-1.
IEC 60770 Series NOTE Harmonized as EN 60770 Series.
IEC 60870 Series NOTE Harmonized as EN 60870 Series.
IEC 60873 Series NOTE Harmonized as EN 60873 Series.
IEC 61069-3:2016 NOTE Harmonized as EN 61069-3:2016 (not modified).
IEC 61069-5:2016 NOTE Harmonized as EN 61069-5:2016 (not modified).
IEC 61298-1 NOTE Harmonized as EN 61298-1.
IEC 61298-2 NOTE Harmonized as EN 61298-2.
IEC 61298-3 NOTE Harmonized as EN 61298-3.
IEC 61298-4 NOTE Harmonized as EN 61298-4.
IEC/TS 62603-1:2014 NOTE Harmonized as CLC/TS 62603-1:2014 (not modified).
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SIST EN 61069-4:2017
EN 61069-4:2016
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 60068 Series Environmental testing EN 60068 Series
IEC 60654 Series Industrial-process measurement and EN 60654 Series
control equipment - Operating conditions
IEC 60721-2 Series Classification of environmental conditions EN 60721-2 Series
IEC 61000-1 Series Electromagnetic compatibility (EMC) - -
IEC 61069-1 2016 Industrial-process measurement, control EN 61069-1 2016
and automation - Evaluation of system
properties for the purpose of system
assessment -
Part 1: Terminology and basic concepts
IEC 61069-2 2016 Industrial-process measurement, control EN 61069-2 2016
and automation - Evaluation of system
properties for the purpose of system
assessment -
Part 2: Assessment methodology
IEC 61326 Series Electrical equipment for measurement, EN 61326 Series
control and laboratory use - EMC
requirements
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SIST EN 61069-4:2017
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SIST EN 61069-4:2017
IEC 61069-4
Edition 2.0 2016-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Industrial-process measurement, control and automation – Evaluation of system
properties for the purpose of system assessment –
Part 4: Assessment of system performance
Mesure, commande et automation dans les processus industriels – Appréciation
des propriétés d'un système en vue de son évaluation –
Partie 4: Évaluation des caractéristiques de fonctionnement d’un système
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40 ISBN 978-2-8322-3408-2

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 61069-4:2017
– 2 – IEC 61069-4:2016 © IEC 2016
CONTENTS

FOREWORD ......................................................................................................................... 4

INTRODUCTION ................................................................................................................... 6

1 Scope ............................................................................................................................ 8

2 Normative references..................................................................................................... 8

3 Terms, definitions, abbreviated terms, acronyms, conventions and symbols .................... 9

3.1 Terms and definitions ............................................................................................ 9

3.2 Abbreviated terms, acronyms, conventions and symbols ........................................ 9

4 Basis of assessment specific to performance ................................................................. 9

4.1 Performance properties ......................................................................................... 9

4.1.1 General ......................................................................................................... 9

4.1.2 Accuracy ...................................................................................................... 10

4.1.3 Response time ............................................................................................. 10

4.1.4 Capacity ...................................................................................................... 10

4.2 Factors influencing performance .......................................................................... 11

5 Assessment method .................................................................................................... 12

5.1 General ............................................................................................................... 12

5.2 Defining the objective of the assessment ............................................................. 12

5.3 Design and layout of the assessment ................................................................... 12

5.4 Planning of the assessment program ................................................................... 12

5.5 Execution of the assessment ............................................................................... 12

5.6 Reporting of the assessment ............................................................................... 12

6 Evaluation techniques .................................................................................................. 13

6.1 General ............................................................................................................... 13

6.2 Analytical evaluation techniques .......................................................................... 13

6.3 Empirical evaluation techniques........................................................................... 13

6.3.1 General topics ............................................................................................. 13

6.3.2 Tests to evaluate accuracy ........................................................................... 14

6.3.3 Tests to evaluate response time ................................................................... 15

6.3.4 Tests to evaluate capacity ............................................................................ 15

6.4 Additional topics for evaluation techniques .......................................................... 15

Annex A (informative) Checklist and example of SRD for system performance .................... 16

Annex B (informative) Check list and/or example of SSD for system performance ................ 19

B.1 SSD information .................................................................................................. 19

B.2 Check points for system performance .................................................................. 19

Annex C (informative) An example of a list of assessment items (information from

IEC TS 62603-1) ................................................................................................................. 20

C.1 Overview............................................................................................................. 20

C.2 Accuracy – Time performances of the BCS .......................................................... 20

C.2.1 Absolute time synchronisation ...................................................................... 20

C.2.2 Requirements of the time stamping ............................................................... 20

C.3 Response time .................................................................................................... 21

C.3.1 Overall response time of the BCS ................................................................. 21

C.3.2 Switch-over time for redundant CPUs ........................................................... 21

C.3.3 Real-time constraints for control functions .................................................... 21

C.3.4 Controller cyclic time .................................................................................... 21

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SIST EN 61069-4:2017
IEC 61069-4:2016 © IEC 2016 – 3 –

C.3.5 Time constraints for display .......................................................................... 22

C.3.6 Call-up time ................................................................................................. 22

C.3.7 Video screen page refresh time .................................................................... 22

Annex D (informative) Model of an evaluation ..................................................................... 23

D.1 General ............................................................................................................... 23

D.2 Analytical evaluation techniques .......................................................................... 25

D.2.1 General ....................................................................................................... 25

D.2.2 Accuracy ...................................................................................................... 25

D.2.3 Response time ............................................................................................. 25

D.2.4 Capacity ...................................................................................................... 26

D.3 Empirical evaluation techniques........................................................................... 26

D.3.1 General ....................................................................................................... 26

D.3.2 Accuracy ...................................................................................................... 26

D.3.3 Response time/capacity ............................................................................... 28

D.4 Precautions ......................................................................................................... 31

Bibliography ....................................................................................................................... 32

Figure 1 – General layout of IEC 61069 ................................................................................. 7

Figure 2 – Performance ........................................................................................................ 9

Figure D.1 – Schematic functional diagram of a system ....................................................... 23

Figure D.2 – Generic physical system model ....................................................................... 25

Table A.1 – SRD performance checklist ............................................................................... 16

Table C.1 – Resolution and discrimination time ................................................................... 21

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SIST EN 61069-4:2017
– 4 – IEC 61069-4:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL-PROCESS MEASUREMENT, CONTROL AND AUTOMATION –
EVALUATION OF SYSTEM PROPERTIES FOR
THE PURPOSE OF SYSTEM ASSESSMENT –
Part 4: Assessment of system performance
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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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

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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.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 61069-4 has been prepared by subcommittee 65A: System

aspects, of IEC technical committee 65: Industrial-process measurement, control and

automation.

This second edition cancels and replaces the first edition published in 1997. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) Reorganization of the material of IEC 61069-4:1997 to make the overall set of standards

more organized and consistent;
b) IEC TS 62603-1:2014 has been incorporated into this edition.
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SIST EN 61069-4:2017
IEC 61069-4:2016 © IEC 2016 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
65A/792/FDIS 65A/801/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 in the IEC 61069 series, published under the general title Industrial-process

measurement, control and automation – Evaluation of system properties for the purpose of

system assessment, can be found on the IEC website.

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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
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SIST EN 61069-4:2017
– 6 – IEC 61069-4:2016 © IEC 2016
INTRODUCTION

IEC 61069 deals with the method which should be used to assess system properties of a

basic control system (BCS). IEC 61069 consists of the following parts:
Part 1: Terminology and basic concepts
Part 2: Assessment methodology
Part 3: Assessment of system functionality
Part 4: Assessment of system performance
Part 5: Assessment of system dependability
Part 6: Assessment of system operability
Part 7: Assessment of system safety
Part 8: Assessment of other system properties

Assessment of a system is the judgement, based on evidence, of the suitability of the system

for a specific mission or class of missions.

To obtain total evidence would require complete evaluation (for example under all influencing

factors) of all system properties relevant to the specific mission or class of missions.

Since this is rarely practical, the rationale on which an assessment of a system should be

based is:

– the identification of the importance of each of the relevant system properties;

– the planning for evaluation of the relevant system properties with a cost-effective

dedication of effort to the various system properties.

In conducting an assessment of a system, it is crucial to bear in mind the need to gain a

maximum increase in confidence in the suitability of a system within practical cost and time

constraints.

An assessment can only be carried out if a mission has been stated (or given), or if any

mission can be hypothesized. In the absence of a mission, no assessment can be made;

however, evaluations can still be specified and carried out for use in assessments performed

by others. In such cases, IEC 61069 can be used as a guide for planning an evaluation and it

provides methods for performing evaluations, since evaluations are an integral part of

assessment.

In preparing the assessment, it can be discovered that the definition of the system is too

narrow. For example, a facility with two or more revisions of the control systems sharing

resources, for example a network, should consider issues of co-existence and inter-operability.

In this case, the system to be investigated should not be limited to the “new” BCS; it should

include both. That is, it should change the boundaries of the system to include enough of the

other system to address these concerns.

The part structure and the relationship among the parts of IEC 61069 are shown in Figure 1.

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SIST EN 61069-4:2017
IEC 61069-4:2016 © IEC 2016 – 7 –
IEC 61069: Industrial-process measurement, control and automation –
Evaluation of system properties for the purpose of system assessment
Part 1: Terminology and basic concepts
• Basic concept
• Terminology ‐ Objective
‐ Description of system
‐ Common terms
‐ Terms for particular part
‐ System properties
‐ Influencing factors
Part 2: Assessment methodology
• Generic requirements of procedure of assessment
‐ Overview, approach and phases
‐ Requirements for each phase
‐ General description of evaluation techniques
Parts 3 to 8: Assessment of each system property
• Basics of assessment specific to each property
‐ Properties and influencing factors
• Assessment method for each property
• Evaluation techniques for each property
IEC
Figure 1 – General layout of IEC 61069
Some example assessment items are integrated in Annex C.
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SIST EN 61069-4:2017
– 8 – IEC 61069-4:2016 © IEC 2016
INDUSTRIAL-PROCESS MEASUREMENT, CONTROL AND AUTOMATION –
EVALUATION OF SYSTEM PROPERTIES FOR
THE PURPOSE OF SYSTEM ASSESSMENT –
Part 4: Assessment of system performance
1 Scope
This part of IEC 61069:

– specifies the detailed method of the assessment of performance of a basic control system

(BCS) based on the basic concepts of IEC 61069-1 and methodology of IEC 61069-2,
– defines basic categorization of performance properties,

– describes the factors that influence performance and which need to be taken into account

when evaluating performance, and

– provides guidance in selecting techniques from a set of options (with references) for

evaluating the performance.
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.
IEC 60068 (all parts), Environmental testing

IEC 60654 (all parts), Industrial-process measurement and control equipment – Operating

conditions
IEC 60721 (all parts), Classification of environmental conditions
IEC 61000 (all parts), Electromagnetic compatibility (EMC)

IEC 61069-1:— , Industrial-process measurement, control and automation – Evaluation of

system properties for the purpose of system assessment – Part 1: Terminology and basic

concepts

IEC 61069-2:— , Industrial-process measurement, control and automation – Evaluation of

system properties for the purpose of system assessment – Part 2: Assessment methodology

IEC 61326 (all parts), Electrical equipment for measurement, control and laboratory use –

EMC requirements
_____________
Second edition to be published simultaneously with this part of IEC 61069.
Second edition to be published simultaneously with this part of IEC 61069.
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SIST EN 61069-4:2017
IEC 61069-4:2016 © IEC 2016 – 9 –
3 Terms, definitions, abbreviated terms, acronyms, conventions and symbols
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 61069-1 apply.

3.2 Abbreviated terms, acronyms, conventions and symbols

For the purposes of this document, the abbreviated terms, acronyms, conventions and

symbols given in IEC 61069-1 apply.
4 Basis of assessment specific to performance
4.1 Performance properties
4.1.1 General

A system is expected to be able to perform tasks required by the system mission with

accuracy and within a specified response time. If the system executes several tasks, it

handles these tasks without obstructing the execution of the other tasks. Hence capacity,

which indicates the number of tasks which can be executed within a time frame, is important.

To assess the performance of a system it is therefore necessary to categorise system

properties in a hierarchical way.
Performance properties are categorized as shown in Figure 2.
Performance
Accuracy Response time Capacity
IEC
Figure 2 – Performance

Performance cannot be assessed directly and cannot be described by a single property.

Performance can only be determined by analysis and testing of each of performance

properties individually.

To be able to determine the system performance properties it is necessary to analyze the

system in terms of information translations.

It is necessary to examine the system performance properties for each of the information

translations in the system.

It should be noted that the system performance properties can be mutually dependent.

When a system accomplishes several tasks, the performance can vary, and for each of the

relevant tasks a separate analysis is required.

Performance should be described for each task, which is represented by an information

translation, with specified conditions for the other tasks concurrently operating.

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SIST EN 61069-4:2017
– 10 – IEC 61069-4:2016 © IEC 2016
4.1.2 Accuracy
Accuracy indicates closeness of agreement between the specified and the realized
information translation ex
...

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