IEC 61804-4:2020

Devices and integration in enterprise systems - Function blocks (FB) for process control and electronic device description language (EDDL) - Part 4: EDD interpretation

IEC 61804-4:2020 specifies EDD interpretation for EDD applications and EDDs to support EDD interoperability. This document is intended to ensure that field device developers use the EDDL constructs consistently and that the EDD applications have the same interpretations of the EDD. It supplements the EDDL specification to promote EDDL application interoperability and improve EDD portability between EDDL applications. This second edition cancels and replaces the first edition published in 2015. This edition constitutes a technical revision.
This edition was developed by merging material from multiple variants of existing EDDL specifications including those from FieldComm Group (Foundation™ Fieldbus , HART® ), PROFIBUS™ Nutzerorganisation e.V. (PNO), and ISA100_Wireless™ Compliance Institute (ISA100 WCI). When a profile deviation exists, it is now indicated in the context where the related deviation is found. As a result, the formatting and numbering of this edition may be different from any of the individual specifications from which this edition was derived.
This edition includes the following significant technical changes with respect to the previous edition:
• communication profiles ISA100 and GPE were added;
• description of rules for optimized-column-width layout have been added;
• description of the concatenation of labels and help was added;
• color banding for meter type charts was added.

Les dispositifs et leur intégration dans les systèmes de l'entreprise - Blocs fonctionnels (FB) pour les procédés industriels et le langage de description électronique de produit (EDDL) - Partie 4: Interprétation EDD

IEC 61804-4:2020 définit l'interprétation EDD pour les applications EDD et les EDD afin d'assurer l'interopérabilité EDD. Le présent document est destiné à garantir que les développeurs d'appareils de terrain utilisent systématiquement les constructions EDDL et que les applications EDD aient la même interprétation des EDD. Il complète la spécification EDDL pour promouvoir l'interopérabilité de l'application EDDL et améliorer la portabilité EDD entre les applications EDDL. Cette deuxième édition annule et remplace la première édition parue en 2015. Cette édition constitue une révision technique.
Cette édition a été élaborée en fusionnant le contenu de plusieurs variantes des spécifications de l'EDDL existantes, y compris celles du FieldComm Group (Foundation™ Fieldbus , HART® ), du PROFIBUS™ Nutzerorganisation e.V. (PNO), et de l'ISA100_Wireless™ Compliance Institute (ISA100 WCI). Lorsqu'une déviation de profil existe, cela est désormais indiqué dans le contexte où la déviation en question a été identifiée. Par conséquent, le formatage et la numérotation de la présente édition peuvent différer des spécifications individuelles desquelles elle est issue.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
• ajout des profils de communication ISA100 et GPE;
• ajout de la description des règles pour la disposition de largeur optimale des colonnes;
• ajout de la description de la concaténation des libellés et des aides;
• ajout de bandes de couleurs sur les diagrammes de type instrument de mesure.

General Information

• Status: Published
• Publication Date: 23-Jun-2020
• ICS: 25.040.40 - Industrial process measurement and control
• ICS: 35.240.50 - IT applications in industry
• Technical Committee: SC 65E - Devices and integration in enterprise systems
• Drafting Committee: WG 7 - TC 65/SC 65E/WG 7
• Current Stage: PPUB - Publication issued
• Start Date: 30-Jun-2020
• Completion Date: 24-Jun-2020

Relations

• Revises: IEC TR 61804-4:2006 - Function blocks (FB) for process control - Part 4: EDD interoperability guideline
• Effective Date: 05-Sep-2023
• Revises: IEC 61804-4:2015 - Function blocks (FB) for process control and electronic device description language (EDDL) - Part 4: EDD interpretation
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61804-4 ®
Edition 2.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Devices and integration in enterprise systems – Function blocks (FB) for
process control and electronic device description language (EDDL) –
Part 4: EDD interpretation
Les dispositifs et leur intégration dans les systèmes de l'entreprise – Blocs
fonctionnels (FB) pour les procédés industriels et le langage de description
électronique de produit (EDDL) –
Partie 4: Interprétation EDD
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IEC 61804-4 ®
Edition 2.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Devices and integration in enterprise systems – Function blocks (FB) for

process control and electronic device description language (EDDL) –

Part 4: EDD interpretation
Les dispositifs et leur intégration dans les systèmes de l'entreprise – Blocs

fonctionnels (FB) pour les procédés industriels et le langage de description

électronique de produit (EDDL) –

Partie 4: Interprétation EDD
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.240.50 ISBN 978-2-8322-8445-2

– 2 – IEC 61804-4:2020 © IEC 2020
CONTENTS
FOREWORD . 8
INTRODUCTION . 11
1 Scope . 12
2 Normative references . 12
3 Terms, definitions, abbreviated terms acronyms and conventions . 12
3.1 General terms and definitions . 12
3.2 Terms and definitions related to modular devices . 13
3.3 Abbreviated terms and acronyms . 14
3.4 Conventions . 14
4 EDDL user interface description . 15
4.1 Overview. 15
4.2 Menu conventions for handheld applications . 15
4.3 Menu conventions for PC-based applications . 16
4.3.1 Overview . 16
4.3.2 Online root menus . 16
4.3.3 Offline root menu . 17
4.3.4 Example of EDD menu structure . 17
4.3.5 User interface . 22
4.4 Label concatenation for indirect variable references . 25
4.4.1 General . 25
4.4.2 Simple variable references . 26
4.4.3 Complex variable references . 26
4.5 Help concatenation . 28
4.5.1 General . 28
4.5.2 Simple variable references . 28
4.5.3 Complex variable references . 29
4.6 Containers and contained items . 30
4.6.1 Overview . 30
4.6.2 Permitted and default STYLEs . 30
4.6.3 Containers . 32
4.6.4 Contained items . 34
4.7 Layout rules . 40
4.7.1 Overview . 40
4.7.2 Controlling the layout by LAYOUT_TYPE attribute . 41
4.7.3 Layout rules for WIDTH and HEIGHT . 45
4.7.4 Layout rules for COLUMNBREAK and ROWBREAK . 48
4.7.5 Layout examples . 54
4.7.6 Conditional user interface . 69
4.8 Graphical elements . 75
5 EDDL data description . 79
5.1 EDDL application stored device data . 79
5.1.1 Overview . 79
5.1.2 FILE . 79
5.1.3 LIST . 81
5.2 Exposing data items outside the EDD application . 88
5.3 Initialization of EDD instances . 88

5.3.1 Overview . 88
5.3.2 Initialization support . 88
5.3.3 TEMPLATE . 88
5.4 Device model mapping . 89
5.4.1 BLOCK_A . 89
5.4.2 BLOCK_B . 89
6 EDDL METHOD programming and usage of builtins . 90
6.1 Method environment . 90
6.1.1 General . 90
6.1.2 Security . 90
6.1.3 Device data . 90
6.1.4 Method TYPE and parameters . 91
6.1.5 Abort processing. 91
6.2 Implementation requirements . 92
6.3 Builtin MenuDisplay . 92
6.4 Division by zero and undetermined floating values . 95
6.4.1 Integer and unsigned integer values . 95
6.4.2 Floating-point values . 95
7 Modular devices . 96
7.1 Overview. 96
7.2 EDD identification . 96
7.3 Instance object model . 96
7.4 Offline configuration . 97
7.5 Online configuration . 97
7.6 Simple modular device example . 97
7.6.1 General . 97
7.6.2 Separate EDD file example with direct EDD referencing . 98
7.6.3 Separate EDD file example with classification EDD referencing and
interfaces . 100
7.6.4 One EDD file example . 102
7.6.5 Combination of single and separate modular device example . 104
7.7 Upload and download for modular devices . 104
7.8 Diagnostic . 104
7.9 Reading modular device topology . 105
7.9.1 SCAN . 105
7.9.2 Detect module type . 107
7.10 Configuration check . 107
8 Session management . 108
8.1 Overview. 108
8.2 Data management . 108
8.2.1 Overview . 108
8.2.2 Caching for online session . 109
8.2.3 Caching for offline session . 110
8.2.4 Caching for dialogs and windows . 111
8.2.5 Caching for METHODs . 112
8.3 UI aspects of editing sessions . 115
8.4 User roles . 116
9 Offline and online configuration . 116
9.1 Overview. 116

– 4 – IEC 61804-4:2020 © IEC 2020
9.2 Offline dataset . 116
9.3 Offline configuration . 116
9.4 Online dataset . 116
9.5 Online configuration . 116
9.6 Upload and download . 117
9.6.1 Overview . 117
9.6.2 Error recovery. 118
9.6.3 Upload procedure . 118
9.6.4 Download procedure . 120
10 EDDL communication description . 122
10.1 General . 122
10.2 Parsing data received from the device . 123
10.3 Parsing complex data items . 123
10.4 Foundation Fieldbus . 123
10.5 ISA100_Wireless communication model . 127
Annex A (normative) Device simulation . 131
Annex B (informative) Predefined identifiers . 132
Annex C (informative) Description of EDDL profiles . 135
C.1 Communication Server (CS) . 135
C.2 Foundation Fieldbus (FF) . 135
C.3 Generic Protocol Extension (GPE) . 135
C.4 HART . 135
C.5 ISA100 . 135
C.6 PROFIBUS (PB) . 135
C.7 PROFINET (PN) . 136
Annex D (normative) Upload/download caching model . 137
Bibliography . 139

Figure 1 – EDD example of root menus . 22
Figure 2 – Example of an EDD application for diagnostics . 22
Figure 3 – Example of an EDD application for process variables . 23
Figure 4 – Example of an EDD application for primary variables . 23
Figure 5 – Example of an EDD application for process-related device features . 24
Figure 6 – Example of an EDD application for device features . 24
Figure 7 – Example of an EDD application for maintenance features . 25
Figure 8 – Usage of COLLECTION MEMBERS in MENUs of STYLE GROUP . 33
Figure 9 – Displaying single bits of BIT_ENUMERATED . 35
Figure 10 – Displaying multiple bits of BIT_ENUMERATED. 36
Figure 11 – Example of an EDD application for a variable of type BIT_ENUMERATED . 36
Figure 12 – EDD example with a "write-only" variable (HANDLING WRITE) . 37
Figure 13 – Basic layout elements . 40
Figure 14 – Example of layout with equal column width . 42
Figure 15 – Example of layout with optimized column width . 42
Figure 16 – Cell body in a layout with optimized column width (label to the left) . 43
Figure 17 – Cell body in a layout with optimized column width (label on top) . 43
Figure 18 – EDD source code for a layout with VARIABLEs spanning columns . 47

Figure 19 – Layout with VARIABLEs spanning multiple columns . 47
Figure 20 – EDD source code for layout for protruding elements example . 49
Figure 21 – Layout for protruding elements . 49
Figure 22 – EDD source code for layout for partially filled rows example . 50
Figure 23 – Layout for partially filled rows . 50
Figure 24 – EDD source code for layout for partially filled rows example . 51
Figure 25 – Layout for partially filled rows . 51
Figure 26 – EDD source code for layout for oversized elements example. 52
Figure 27 – Oversized element in a layout with equal column width . 52
Figure 28 – Oversized element in a layout with optimized column width . 52
Figure 29 – EDD source code example for a layout for columns in stacked group . 53
Figure 30 – Layout for columns in stacked group . 53
Figure 31 – EDD source code for layout for columns with GRAPHs in stacked group
example . 54
Figure 32 – Layout for columns with GRAPHs in stacked group . 54
Figure 33 – Example of an EDD for an overview menu . 55
Figure 34 – Example of an EDD application for an overview window . 55
Figure 35 – EDD source code for a layout with menu items spanning a single column . 55
Figure 36 – Example of a layout with menu items spanning a single column . 56
Figure 37 – Example of an EDD using COLUMNBREAK . 56
Figure 38 – Example of an EDD application for an overview window . 57
Figure 39 – EDD example for an overview window . 57
Figure 40 – Example of an EDD application for an overview window . 58
Figure 41 – EDD source code for a layout with small in-line images . 58
Figure 42 – Example of a layout with small in-line images . 59
Figure 43 – EDD source code for a multi-column layout with GROUP . 60
Figure 44 – Example of a multi-column layout with GROUP . 61
Figure 45 – Example of an EDD for in-line graphs and charts . 61
Figure 46 – Example of an EDD application for an in-line graph . 62
Figure 47 – Example of an EDD for full-width graphs and charts . 62
Figure 48 – Example of an EDD application for a full-width graph in a layout with equal

column width . 63
Figure 49 – Example of an EDD application for a full-width graph in a layout with
optimized column width . 64
Figure 50 – Example of an EDD for nested containers . 65
Figure 51 – Example of an EDD application for nested containers . 65
Figure 52 – Example of an EDD for EDIT_DISPLAYS . 66
Figure 53 – Example of an EDD application for EDIT_DISPLAYS. 67
Figure 54 – Example of an EDD for images . 67
Figure 55 – Example of an EDD application for images . 68
Figure 56 – Example of an EDD for large inline-images . 68
Figure 57 – Example of layout with a large inline-image . 69
Figure 58 – EDD example for VALIDITY in online session . 70
Figure 59 – Example of an EDD application for a gauge with limit regions . 76

– 6 – IEC 61804-4:2020 © IEC 2020
Figure 60 – Example of an EDD for a gauge with limit regions . 78
Figure 61 – Example of a file declaration . 80
Figure 62 – Example of comparing valve signatures. 81
Figure 63 – Example of more complex file declaration . 82
Figure 64 – Example of reviewing the stored radar signals . 83
Figure 65 – Example of an EDD that inserts, replaces, or compares radar signals . 88
Figure 66 – Example of a BLOCK_A . 89
Figure 67 – Example of a wizard . 94
Figure 68 – The different relations of a module . 97
Figure 69 – Components and possible configuration of the modular devices . 98
Figure 70 – Separate EDD file example with direct EDD referencing . 99
Figure 71 – EDD example for module1 . 99
Figure 72 – EDD example for module2 . 100
Figure 73 – EDD example for modular device . 101
Figure 74 – EDD example for module1 . 102
Figure 75 – EDD example for module2 . 102
Figure 76 – EDD example for module2 . 103
Figure 77 – Upload/download order of a modular device . 104
Figure 78 – Example of a SCAN METHOD . 106
Figure 79 – Example of a DETECT METHOD . 107
Figure 80 – Example of a CHECK_CONFIGURATION METHOD . 108
Figure 81 – Data caching for an online session . 110
Figure 82 – Data caching for an offline session . 111
Figure 83 – Sub dialogs or windows using a shared edit cache . 111
Figure 84 – Sub dialogs or windows using separate edit caches . 112
Figure 85 – Data caching for nested METHODs . 112
Figure 86 – Data caching for a METHOD invoked within a dialog or window . 113
Figure 87 – Data caching for a METHOD invoking a dialog using an edit cache . 113
Figure 88 – Data caching for a METHOD invoking a dialog . 113
Figure 89 – Data flow for download to the device . 117
Figure 90 – Data flow for upload from the device . 118
Figure 91 – Example device with 2 unique BLOCK_A definitions . 124
Figure 92 – Example EDD for a device with 2 unique BLOCK_A definitions . 125
Figure 93 – BLOCK_A example with PARAMETER_LISTS . 126
Figure 94 – Example EDD for a BLOCK_A with PARAMETER_LISTS . 127
Figure 95 – Example ISA100_Wireless device objects representation . 128
Figure 96 – Example EDD for a ISA100_Wireless device with 2 unique BLOCK_A
definitions . 129
Figure 97 – BLOCK_A example with PARAMETER_LISTS . 129
Figure 98 – Example EDD for a BLOCK_A with PARAMETER_LISTS . 130
Figure D.1 – Upload caching model . 137
Figure D.2 – Download caching model . 138

Table 1 – List of defined root menu identifiers for handhelds . 15

Table 2 – List of defined root menu identifiers for PC-based devices . 16
Table 3 – Fall back alternatives for online root menus . 16
Table 4 – Fall back alternatives for offline root menus . 17
Table 5 – Label rule summary for simple variable references . 26
Table 6 – Label rule summary for simple variable references . 26
Table 7 – Prefix rule summary for complex variable references . 27
Table 8 – Prefix rule summary for complex variable references . 27
Table 9 – Body rule summary for complex variable references . 27
Table 10 – Body rule summary for complex variable references . 27
Table 11 – Suffix rule summary for complex variable references . 28
Table 12 – Suffix rule summary for complex variable references . 28
Table 13 – Help rule summary for simple variable references . 28
Table 14 – Help rule summary for simple variable references . 28
Table 15 – Help prefix rule summary for complex variable references . 29
Table 16 – Help prefix rule summary for complex variable references . 29
Table 17 – Help suffix rule summary for complex variable references . 29
Table 18 – Help suffix rule summary for complex variable references . 29
Table 19 – Permitted contained items and default STYLES . 31
Table 20 – Uninitialized state of VARIABLEs on user interface . 34
Table 21 – Example of "write-only" variable in an online dialog . 38
Table 22 – Description of layout content . 41
Table 23 – Minimum and maximum width for input fields spanning one column . 43
Table 24 – WIDTH and HEIGHT span and applicability . 45
Table 25 – Example 1 VALIDITY in an online session . 71
Table 26 – Example 2 VALIDITY in an online session . 72
Table 27 – Example 3 VALIDITY in an online session . 73
Table 28 – Example 4 VALIDITY in an online session . 74
Table 29 – Examples of floating-point results . 95
Table 30 – Usages of COMPONENT_PATH . 96
Table 31 – Diagnostic classifications . 105
Table 32 – Terminology for session management . 108
Table 33 – Terminology used in data management . 109
Table 34 – Builtins for method cache controlling . 114
Table 35 – List of defined upload menu identifiers . 118
Table 36 – List of defined download menu identifiers . 120
Table B.1 – ARRAY predefined identifiers . 132
Table B.2 – COLLECTION predefined identifiers . 132
Table B.3 – COMMAND predefined identifiers . 132
Table B.4 – IMAGE predefined identifiers . 133
Table B.5 – MENU predefined identifiers . 133
Table B.6 – METHOD predefined identifiers . 134
Table B.7 – VARIABLE predefined identifiers . 134

– 8 – IEC 61804-4:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DEVICES AND INTEGRATION IN ENTERPRISE SYSTEMS –
FUNCTION BLOCKS (FB) FOR PROCESS CONTROL AND
ELECTRONIC DEVICE DESCRIPTION LANGUAGE (EDDL) –

Part 4: EDD interpretation
FOREWORD
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International Standard IEC 61804-4 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 was developed by merging material from multiple variants of existing EDDL
1 2
specifications including those from FieldComm Group (Foundation™ Fieldbus , HART® ),
3 4
PROFIBUS™ Nutzerorganisation e.V. (PNO), and ISA100_Wireless™ Compliance Institute
(ISA100 WCI). When a profile deviation exists, it is now indicated in the context where the
related deviation is found. As a result, the formatting and numbering of this edition may be
different from any of the individual specifications from which this edition was derived.
This edition includes the following significant technical changes with respect to the previous
edition:
• communication profiles ISA100 and GPE were added;
• description of rules for optimized-column-width layout have been added;
• description of the concatenation of labels and help was added;
• color banding for meter type charts was added.
The text of this International Standard is based on the following documents:
CDV Report on voting
65E/633/CDV 65E/690/RVC
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 publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 61804 series, published under the general title Devices and
integration in enterprise systems – Function blocks (FB) for process control and Electronic
Device Description Language (EDDL), can be found on the IEC website.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.

__________
FOUNDATION™ Fieldbus is the trademark of FieldComm Group. This information is given for the convenience of
users of this document and does not constitute an endorsement by IEC of the product named. Equivalent
products may be used if they can be shown to lead to the same results.
HART® is the registered trademark of FieldComm Group. This information is given for the convenience of users
of this document and does not constitute an endorsement by IEC of the product named. Equivalent products
may be used if they can be shown to lead to the same results.
PROFIBUS and PROFINET are the trademarks of the PROFIBUS Nutzerorganisation e.V. This information is
given for the convenience of users of this document and does not constitute an endorsement by IEC of the
product named. Equivalent products may be used if they can be shown to lead to the same results.
ISA100_Wireless™ is the trademark of ISA100 Wireless Compliance Institute. This information is given for the
convenience of users of this document and does not constitute an endorsement by IEC of the product named.
Equivalent products may be used if they can be shown to lead to the same results.

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