Field Device Integration (FDI) - Part 3: Server

IEC 62769-3:2021 is available as IEC 62769-3:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 62769-3:2021 specifies the FDI Server. The overall FDI architecture is illustrated in Figure 1. The architectural components that are within the scope of this document have been highlighted in this figure.

Intégration des appareils de terrain (FDI) - Partie 3: Serveur

IEC 62769-3:2021 est disponible sous forme de IEC 62769-3:2021 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente .
L'IEC 62769-3:2021 spécifie le Serveur FDI. L'architecture FDI complète est représentée à la Figure 1. Les composants architecturaux qui relèvent du domaine d'application du présent document ont été mis en évidence dans cette figure.

General Information

Status
Published
Publication Date
04-Feb-2021
Current Stage
PPUB - Publication issued
Completion Date
05-Feb-2021
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IEC 62769-3
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Field device integration (FDI) –
Part 3: Server
Intégration des appareils de terrain (FDI) –
Partie 3: Serveur
IEC 62769-3:2021-02(en-fr)
---------------------- Page: 1 ----------------------
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IEC 62769-3
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Field device integration (FDI) –
Part 3: Server
Intégration des appareils de terrain (FDI) –
Partie 3: Serveur
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-9310-2

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® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 62769-3:2021 © IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 5

INTRODUCTION ..................................................................................................................... 7

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

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

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

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

3.2 Abbreviated terms ................................................................................................... 9

3.3 Conventions ............................................................................................................ 9

4 Overview ......................................................................................................................... 9

5 Information Model .......................................................................................................... 10

5.1 General ................................................................................................................. 10

5.2 Online/Offline ........................................................................................................ 11

5.2.1 Overview ....................................................................................................... 11

5.2.2 Transfer to device .......................................................................................... 11

5.2.3 Transfer from device ...................................................................................... 11

5.3 Access privileges .................................................................................................. 12

5.4 Private Parameters ............................................................................................... 12

5.5 Locking ................................................................................................................. 12

5.6 EditContext ........................................................................................................... 13

5.6.1 Concept and usage model ............................................................................. 13

5.6.2 Services ........................................................................................................ 14

5.6.3 NodeIds ......................................................................................................... 15

5.6.4 Reading ......................................................................................................... 15

5.6.5 Writing ........................................................................................................... 15

5.6.6 Writing dominant and dependent Variables .................................................... 15

5.6.7 Actions (EDD METHODS) .............................................................................. 17

5.6.8 UIDs .............................................................................................................. 18

5.6.9 Synchronization ............................................................................................. 18

5.7 Reading ................................................................................................................ 18

5.7.1 General ......................................................................................................... 18

5.7.2 Reading offline variables ............................................................................... 19

5.7.3 Reading online variables ............................................................................... 19

5.8 Writing .................................................................................................................. 20

5.8.1 General ......................................................................................................... 20

5.8.2 Write offline variables .................................................................................... 21

5.8.3 Writing online variables ................................................................................. 22

5.8.4 Writing to an EditContext ............................................................................... 24

5.9 Subscription .......................................................................................................... 25

5.9.1 General ......................................................................................................... 25

5.9.2 Subscription of offline variables ..................................................................... 25

5.9.3 Subscription of online variables ..................................................................... 26

5.10 Device topology .................................................................................................... 28

5.10.1 General ......................................................................................................... 28

5.10.2 Connection Points ......................................................................................... 28

5.10.3 Topology management .................................................................................. 29

5.10.4 Topology scanning ......................................................................................... 32

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IEC 62769-3:2021 © IEC 2021 – 3 –

5.10.5 Use of SCAN function .................................................................................... 33

5.10.6 Validation of defined topology ........................................................................ 34

5.11 User Interface Elements ........................................................................................ 34

5.11.1 User Interface Descriptions............................................................................ 34

5.11.2 User Interface Plug-ins .................................................................................. 35

5.12 Actions ................................................................................................................. 35

5.12.1 FDI Server – FDI Client interaction ................................................................ 35

5.12.2 Action state machine ..................................................................................... 38

5.12.3 Actions Proxies .............................................................................................. 40

5.12.4 Actions, EDD Actions and Actions Proxies ..................................................... 40

6 OPC UA services ........................................................................................................... 42

6.1 OPC UA profiles ................................................................................................... 42

6.2 Service error information ....................................................................................... 42

6.2.1 Overview ....................................................................................................... 42

6.2.2 OPC UA services and their response ............................................................. 42

6.2.3 Mappings of EDDL response codes to OPC UA service response .................. 42

6.3 Parameter value update during write service request ............................................ 43

6.4 Localization .......................................................................................................... 44

6.5 Audit events .......................................................................................................... 44

7 Communication .............................................................................................................. 44

7.1 Notation ................................................................................................................ 44

7.2 General ................................................................................................................. 44

7.2.1 Concepts ....................................................................................................... 44

7.2.2 Terms ............................................................................................................ 47

7.3 Communication Service processing ....................................................................... 48

7.3.1 Communication Service invocation ................................................................ 48

7.3.2 Analyze communication path ......................................................................... 48

7.3.3 Manage communication relations ................................................................... 49

7.3.4 Communication service request mapping ....................................................... 49

7.3.5 Communication service request propagation .................................................. 50

7.3.6 Communication error handling ....................................................................... 51

7.4 FDI Communication Server specific handling ........................................................ 51

7.4.1 Discovery ...................................................................................................... 51

7.4.2 Information Model synchronization ................................................................. 52

8 Parallel Execution within the FDI Server ........................................................................ 52

8.1 Motivation ............................................................................................................. 52

8.2 Internal structure of the EDD interpreter................................................................ 52

8.3 Rules for running an EDD entity ............................................................................ 53

Annex A (informative) FDI Server functional structure .......................................................... 54

A.1 FDI functional elements ........................................................................................ 54

A.2 FDI Server extension ............................................................................................ 55

Annex B (informative) Access privileges and user roles ....................................................... 57

B.1 User roles and usage case .................................................................................... 57

B.2 Private data usage ................................................................................................ 58

Annex C (informative) Parallel execution within the FDI Server – Examples ......................... 59

C.1 Simple example for a synchronous execution ........................................................ 59

C.2 Example for a concurrent execution ...................................................................... 59

C.3 Deadlock detection in concurrent execution .......................................................... 61

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– 4 – IEC 62769-3:2021 © IEC 2021

Figure 1 – FDI architecture diagram ........................................................................................ 8

Figure 2 – Locking services .................................................................................................. 13

Figure 3 – EditContext models .............................................................................................. 14

Figure 4 – Online EditContext state diagram for dominant and dependent Variables ............. 16

Figure 5 – Offline EditContext state diagram for dominant and dependent Variables ............. 17

Figure 6 – EditContext for EDD Methods ............................................................................... 17

Figure 7 – Offline variable read ............................................................................................. 19

Figure 8 – Online variable read ............................................................................................. 20

Figure 9 – Offline variable write immediate ........................................................................... 21

Figure 10 – Online variable write immediate ......................................................................... 23

Figure 11 – Write with EditContext ........................................................................................ 24

Figure 12 – Offline variable subscription ............................................................................... 26

Figure 13 – Online variable subscription ............................................................................... 27

Figure 14 – Topology with Network objects (non-normative) ................................................. 28

Figure 15 – Add Device to topology ...................................................................................... 30

Figure 16 – Remove device from topology ............................................................................ 31

Figure 17 – Scan topology .................................................................................................... 32

Figure 18 – Action execution ................................................................................................. 37

Figure 19 – Action state machine .......................................................................................... 38

Figure 20 – System communication integration example ....................................................... 45

Figure 21 – FDI Communication Server integration example ................................................. 46

Figure 22 – Gateway integration example ............................................................................. 47

Figure 23 – Message propagation example scenario ............................................................. 50

Figure A.1 – Functional components of an FDI Server .......................................................... 54

Figure A.2 – FDI Server extensions ...................................................................................... 56

Figure B.1 – User roles and access privileges ....................................................................... 57

Figure C.1 – Synchronous execution of two triggers .............................................................. 59

Figure C.2 – Concurrent execution of two triggers (step 1) .................................................... 59

Figure C.3 – Concurrent execution of two triggers (step 2) .................................................... 60

Figure C.4 – Concurrent execution of two triggers (step 3) .................................................... 60

Figure C.5 – Concurrent execution of two triggers (step 4) .................................................... 61

Figure C.6 – Concurrent execution of two triggers................................................................. 61

Table 1 – Action states ......................................................................................................... 38

Table 2 – Action state transitions .......................................................................................... 39

Table 3 – EDD Action types and the EDD constructs that use them ...................................... 41

Table 4 – OPC UA severity bits and EDDL response codes TYPE ........................................ 43

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IEC 62769-3:2021 © IEC 2021 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIELD DEVICE INTEGRATION (FDI) –
Part 3: Server
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

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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 62769-3 has been prepared by subcommittee 65E: Devices and

integration in enterprise systems, of IEC technical committee 65: Industrial-process

measurement, control and automation.

This second edition cancels and replaces the first edition published in 2015. This edition

constitutes a technical revision.

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

edition:

a) modification of the edit context concept to harmonize the IEC 61804 and the IEC 62769

series.
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– 6 – IEC 62769-3:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
65E/760/FDIS 65E/770/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 62769 series, published under the general title Field Device

Integration (FDI), can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document 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

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colour printer.
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IEC 62769-3:2021 © IEC 2021 – 7 –
INTRODUCTION

The IEC 62769 series has the general title Field Device Integration (FDI) and the following

parts:
– Part 1: Overview
– Part 2: FDI Client
– Part 3: FDI Server
– Part 4: FDI Packages
– Part 5: FDI Information Model
– Part 6: FDI Technology Mapping
– Part 7: FDI Communication Devices
– Part 100: Profiles – Generic Protocol Extensions
– Part 101-1: Profiles – Foundation Fieldbus H1
– Part 101-2: Profiles – Foundation Fieldbus HSE
– Part 103-1: Profiles – PROFIBUS
– Part 103-4: Profiles – PROFINET
– Part 109-1: Profiles – HART and WirelessHART
– Part 115-2: Profiles – Protocol-specific Definitions for Modbus RTU
– Part 150-1: Profiles – ISA 100.11a
---------------------- Page: 9 ----------------------
– 8 – IEC 62769-3:2021 © IEC 2021
FIELD DEVICE INTEGRATION (FDI) –
Part 3: Server
1 Scope

This part of IEC 62769 specifies the FDI Server. The overall FDI architecture is illustrated in

Figure 1. The architectural components that are within the scope of this document have been

highlighted in this figure.
Figure 1 – FDI architecture diagram
2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements 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.

IEC 61804 (all parts), Function blocks (FB) for process control and electronic device

description language (EDDL)
---------------------- Page: 10 ----------------------
IEC 62769-3:2021 © IEC 2021 – 9 –

IEC 61804-4:2020, Function blocks (FB) for process control and electronic device description

language (EDDL) – Part 4: EDD interpretation
IEC 62541-4, OPC unified architecture – Part 4: Services
IEC 62541-7, OPC unified architecture – Part 7: Profiles
IEC 62769-1, Field Device Integration (FDI) – Part 1: Overview
IEC 62769-2, Field Device Integration (FDI) – Part 2: FDI Client
IEC 62769-4, Field Device Integration (FDI) – Part 4: FDI Packages
IEC 62769-5, Field Device Integration (FDI) – Part 5: FDI Information Model
IEC 62769-7, Field Device Integration (FDI) – Part 7: Communication Devices
3 Terms, definitions, abbreviated terms and conventions
3.1 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 62769-1 as well as

the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
Actions Proxy

internal FDI Server entity that encapsulates all the EDD Methods specified in an EDD Action

definition
3.2 Abbreviated terms

For the purposes of this document, the abbreviated terms given in IEC 62769-1 apply.

3.3 Conventions
For the purposes of this document, the conventions
...

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