IEC 62769-7:2021

IEC 62769-7 ®
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Field device integration (FDI) –
Part 7: Communication devices
Intégration des appareils de terrain (FDI) –
Partie 7: Appareils de communication

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IEC 62769-7 ®
Edition 2.0 2021-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Field device integration (FDI) –

Part 7: Communication devices
Intégration des appareils de terrain (FDI) –

Partie 7: Appareils de communication

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40; 35.100.05 ISBN 978-2-8322-9314-0

– 2 – IEC 62769-7:2021 © IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 10
3 Terms, definitions, abbreviated terms and conventions . 10
3.1 Terms and definitions . 10
3.2 Abbreviated terms . 10
3.3 Conventions . 11
4 General . 11
5 FDI Communication Package . 13
5.1 General . 13
5.2 EDD . 13
5.2.1 General rules . 13
5.2.2 Device component . 14
5.2.3 CommunicationDevice component . 15
5.2.4 Communication service provider component . 16
5.2.5 Connection Point component . 17
5.2.6 Connection Point collection. 18
5.2.7 Network component . 18
5.2.8 ValidateNetwork . 20
5.2.9 ValidateModules . 20
5.2.10 UIP specifics . 21
5.2.11 Deployment . 21
6 Communication relations . 21
7 FDI Communication Server definition . 23
7.1 General . 23
7.2 General characteristics . 23
7.3 Information Model . 23
7.3.1 General . 23
7.3.2 CommunicationServerType . 26
7.3.3 ServerCommunicationDeviceType . 30
7.3.4 ServerCommunicationServiceType . 33
7.4 OPC UA Server Profile for FDI Communication Server . 37
7.5 Mapping the FDI Server IM to the FDI Communication Server IM . 38
7.5.1 General . 38
7.5.2 Information Model differences . 38
7.6 Installer. 39
7.7 FDI Communication Package . 39
7.7.1 General . 39
7.7.2 EDD for Lightweight Communication Server. 40
7.7.3 EDD for Multi-Channel Communication Server . 40
7.7.4 COMMANDs in EDDs for FDI Communication Servers . 41
7.7.5 Documentation . 41
7.8 Handling and behavior . 41
7.8.1 General . 41

7.8.2 Deployment . 42
7.8.3 Server configuration . 42
7.8.4 Start up . 43
7.8.5 Shutdown . 43
7.8.6 Watchdog . 43
7.8.7 Establish the OPC UA connection . 43
7.8.8 Instantiate the Communication Server . 44
7.8.9 Configure the communication hardware . 44
7.8.10 Configuring the Network . 44
7.8.11 Parameterize . 44
7.8.12 Initialize . 44
7.8.13 Create the communication service object . 45
7.8.14 Communication relation . 45
7.8.15 Connect . 45
7.8.16 Disconnect . 46
7.8.17 Abort Indication . 46
7.8.18 Scan . 46
7.8.19 SetAddress . 46
8 FDI Communication Gateway definition . 46
8.1 General . 46
8.2 Information Model . 46
8.2.1 General . 46
8.2.2 CommunicationGatewayType . 47
8.2.3 GatewayCommunicationDeviceType . 48
8.2.4 GatewayCommunicationServiceType . 51
8.3 FDI Communication Package . 55
8.3.1 General . 55
8.3.2 EDD . 56
8.4 Handling and behavior . 57
8.4.1 General . 57
8.4.2 Deployment . 58
8.4.3 Start up . 58
8.4.4 Configure the communication hardware . 58
8.4.5 Configure the Network . 58
8.4.6 Parameterize . 58
8.4.7 Communication relation . 59
8.4.8 Connect . 59
8.4.9 Disconnect . 59
8.4.10 Abort indication . 59
8.4.11 Scan . 59
8.4.12 Communication Error Handling . 60
Annex A (informative) Layered protocols . 61
A.1 General . 61
A.2 Convention for protocol-specific annex creation . 61
A.3 FDI Communication Package definition . 62
A.3.1 Communication services . 62
A.3.2 Connection Point . 62
A.3.3 Network . 62
A.4 Representation in the IM . 63

– 4 – IEC 62769-7:2021 © IEC 2021
Annex B (normative) Namespace and mappings . 64

Figure 1 – FDI architecture diagram . 9
Figure 2 – FDI communication infrastructure architecture . 12
Figure 3 – Communication relation . 22
Figure 4 – Communication relation state chart . 23
Figure 5 – FDI Communication Server AddressSpace . 25
Figure 6 – CommunicationServerType . 26
Figure 7 – ServerCommunicationDeviceType . 30
Figure 8 – ServerCommunicationServiceType . 34
Figure 9 – Information Model differences (example) . 38
Figure 10 – FDI Communication Server state machine . 42
Figure 11 – Communication relation state chart . 45
Figure 12 – Gateway information model . 47
Figure 13 – CommunicationGatewayType . 48
Figure 14 – GatewayCommunicationDeviceType . 49
Figure 15 – GatewayCommunicationServiceType . 52
Figure 16 – Nested Communication . 58

Table 1 – ValidateNetwork Action arguments . 20
Table 2 – ValidateModules Action arguments . 21
Table 3 – CommunicationServerType definition . 26
Table 4 – MethodSet of CommunicationServerType . 26
Table 5 – Reset Method arguments . 27
Table 6 – Reset Method AddressSpace definition . 27
Table 7 – Initialize Method arguments . 28
Table 8 – Initialize Method AddressSpace definition . 28
Table 9 – AddComponent Method arguments . 29
Table 10 – AddComponent Method AddressSpace definition . 29
Table 11 – RemoveComponent Method arguments . 30
Table 12 – RemoveComponent Method AddressSpace definition . 30
Table 13 – ServerCommunicationDeviceType definition . 31
Table 14 – MethodSet of ServerCommunicationDeviceType . 31
Table 15 – Scan Method arguments . 32
Table 16 – Scan Method AddressSpace definition . 32
Table 17 – ResetScan Method arguments . 32
Table 18 – ResetScan Method AddressSpace definition. 33
Table 19 – SetAddress Method arguments . 33
Table 20 – ServerCommunicationServiceType definition . 34
Table 21 – MethodSet of ServerCommunicationServiceType . 34
Table 22 – Connect Method arguments . 35
Table 23 – Disconnect Method arguments . 36
Table 24 – Transfer Method arguments . 36

Table 25 – GetPublishedData Method arguments. 37
Table 26 – FDICommunicationServer_Facet definition . 37
Table 27 – CommunicationGatewayType definition . 48
Table 28 – GatewayCommunicationDeviceType definition . 49
Table 29 – MethodSet of GatewayCommunicationDeviceType . 49
Table 30 – Scan Method arguments . 50
Table 31 – Scan Method AddressSpace definition . 50
Table 32 – ScanNext Method arguments . 51
Table 33 – ScanNext Method AddressSpace definition . 51
Table 34 – GatewayCommunicationServiceType definition . 52
Table 35 – MethodSet of GatewayCommunicationServiceType . 53
Table 36 – Connect Method arguments . 54
Table 37 – Transfer Method arguments . 55

– 6 – IEC 62769-7:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIELD DEVICE INTEGRATION (FDI) –

Part 7: Communication devices
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 62769-7 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) support for generic protocol extension for faster adoption of other technologies;
b) support of new protocols;
c) generic protocol extension to allow adoption of other communication protocols;
d) based on generic protocol extension: Modbus RTU.

The text of this International Standard is based on the following documents:
FDIS Report on voting
65E/764/FDIS 65E/774/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 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
understanding of its contents. Users should therefore print this document using a
colour printer.
– 8 – IEC 62769-7:2021 © IEC 2021
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

FIELD DEVICE INTEGRATION (FDI) –

Part 7: Communication devices
1 Scope
This part of IEC 62769 specifies the elements implementing communication capabilities called
Communication Devices (IEC 62769-5).
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 illustration. The document
scope with respect to FDI Packages is limited to Communication Devices. The Communication
Server shown in Figure 1 is an example of a specific Communication Device.

IEC
Figure 1 – FDI architecture diagram

– 10 – IEC 62769-7:2021 © IEC 2021
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 61804-3, Function blocks (FB) for process control and Electronic Device Description
Language (EDDL) – Part 3: EDDL syntax and semantics
IEC 61804-4, Function blocks (FB) for process control and Electronic Device Description
Language (EDDL) – Part 4: EDD interpretation
IEC 62541 (all parts), OPC Unified Architecture
IEC 62769-1, Field Device Integration (FDI) – Part 1: Overview
IEC 62769-2, Field Device Integration (FDI) – Part 2: FDI Client
IEC 62769-3, Field Device Integration (FDI) – Part 3: FDI Server
IEC 62769-4:2020, Field Device Integration (FDI) – Part 4: FDI Packages
IEC 62769-5, Field Device Integration (FDI) – Part 5: FDI Information Model
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
gateway
communication device that enables to bridge between different physical networks or different
protocols
3.2 Abbreviated terms
For the purposes of this document, the abbreviated terms given in IEC 62769-1 and the
following apply.
HTTP Hypertext Transfer Protocol
IP Internet Protocol
PHY Physical communication hardware
SNMP Simple Network Management Protocol
TCP Transmission Control Protocol
URI Uniform Resource Identifier

3.3 Conventions
For the purposes of this document, the conventions given in IEC 62769-1 apply.
This document uses the graphical notation defined in IEC 62769-5.
4 General
The abstract term "FDI Communication Device" represents an entity implementing
communication functions over a network using a specific protocol. The group of FDI
Communication Devices splits into two main groups.
a) The FDI Communication Server is a dedicated OPC UA Server providing access to one or
more field device networks. The FDI Communication Server is specified in Clause 7.
b) The FDI Communication Gateway enables to bridge between different physical networks
or different protocols. The bridging business logic is implemented in the EDD component
that is provided with an FDI Communication Package. The FDI Communication Gateway is
specified in Clause 8.
NOTE The main differences between a Gateway and a Communication Server are:
in terms of FDI, the FDI Communication Server is a dedicated OPC UA Server providing access to one or more
field device networks. A Gateway is a communication device that enables to bridge between different physical
networks or different protocols. The logical representation of a Gateway device within the FDI Server hosted
Information Model enables the FDI Server to process communication in heterogeneous network topologies.

– 12 – IEC 62769-7:2021 © IEC 2021

IEC
Figure 2 – FDI communication infrastructure architecture
The FDI Server hosted Information Model contains a representation of the network topology.
(see also IEC 62769-5). The Information Model shown in Figure 2 is an example excerpt to
illustrate how the used elements of the Information Model reflect the actual network topology.
1) The instance of CommunicationServerType (named CommunicationServerName)
represents the FDI Communication Server. The FDI Communication Server implements
physical communication network access (Communication hardware). Clause 7 describes
related Information Model specifics, required FDI Communication Package content and
handling of elements therein. For sub-devices, see IEC 62769-5.
2) The instance of ServerCommunicationDeviceType and ServerCommunication-ServiceType
(named Network_B_Channel) maps to the FDI Communication Server implemented
communication services. The ServerCommunicationDeviceType is specified in 7.3.3. The
ServerCommunicationServiceType is specified in 7.3.4.

3) The instance of CommunicationGatewayType (named Gateway_B1) represents the
physical Gateway. Clause 8 describes the related Information Model specifics, the
required FDI Package content and the handling of elements therein.
4) The instance of GatewayCommunicationDeviceType (named Module 1) maps to a physical
or logical module enabling communication to the network to which this module is
connected. The GatewayCommunicationDeviceType is specified in 8.3.2.3. The related
Gateway specifics are described in Clause 8.
5) The instance of GatewayCommunicationServiceType (named
CommunicationServiceProvider_G) represents the Gateways' ability to process
communication services. The Gateway-specific implementation of
GatewayCommunicationServiceType is based on Business Logic that enables to run
communication services in heterogeneous communication networks.
6) A communication relation (more details are described in Clause 6) between a physical
device and the device representation managed by the FDI Server is always associated to
communication service objects that are instances of a
GatewayCommunicationServiceType or ServerCommunicationServiceType. The ability of
instantiating multiple communication service objects supports protocols enables to
operate multiple logical connections between a bus master and a device.
7) The Information Model represents the connections between the physical devices shown on
the left side of Figure 2 based on instances of ConnectionPointType NetworkType and the
depicted relations. ConnectionPointType and NetworkType are specified in IEC 62769-5.
5 FDI Communication Package
5.1 General
The FDI Server imports the FDI Communication Package like any other FDI Device Package.
Clause 5 specifies the FDI Communication Package details.
5.2 EDD
5.2.1 General rules
The FDI Communication Package contained EDD is not restricted, but bound to a protocol-
specific annex (IEC 62769-4:2020, Annex F).
The EDD elements as specified in IEC 62769-4:2020, Annex F, and provided with an FDI
Communication Package shall describe:
a) Parameter and parameter structures. Mandatory protocol-specific parameter definitions
are found in IEC 62769-4:2020, Annex F. The parameters shall contain any parameter that
requires adjustment for proper communication service operation.
b) Physical Layer identification. Protocol-specific definitions are found in IEC 62769-4:2020,
Annex F.
Communication devices' modularity: The modularity information shall be based on using
the EDDL constructs COMPONENT (see IEC 61804-3).
FDI envisions communication device modularity to cope with communication hardware
providing multiple physical or logical communication channels to access multiple logical or
physical communication networks. Each module element of the whole communication
device shall be described by a separate EDD element.
c) The COMPONENT definition shall be used to support the system implemented topology
configuration. Protocol-specific definitions are found in IEC 62769-4:2020, Annex F. The
related COMPONENT definitions are described in 5.2.2, 5.2.3, 5.2.4, and 5.2.7.
d) The Business Logic shall contain a method enabled to validate the network (see 5.2.8).
The validation function considers the elements only directly connected to the network. The
validation function shall be referred by the EDDL specified CHECK_CONFIGURATION
attribute.
– 14 – IEC 62769-7:2021 © IEC 2021
e) The Business Logic can contain a method enabled to validate the module configuration
(see 5.2.9) or the network configuration (see 5.2.8). The validation function considers the
elements only directly connected to the related parent element in the topology. The
validation function shall be referred by the EDDL specified CHECK_CONFIGURATION
attribute.
f) Connection Point data: The Connection Point (see 5.2.4 and 5.2.6) shall be described
through EDDL constructs COMPONENT, COLLECTION and VARIABLE. The
COMPONENT definition associates the Connection Point element to the Communication
Device. The VARIABLE definitions represent the properties of a specific Connection Point.
The COLLECTION represents the Connection Point structure as such. Protocol-specific
definitions are found in IEC 62769-4:2020 Annex F.
g) MENU:
The Menu structure shall follow the Menu conventions for PC-based applications in
accordance with IEC 61804-4, which enables access to:
1) FDI Communication Device Type (Bus) parameters: These parameters shall be made
accessible by means of "offline_root_menu".
2) Topology Configuration Dialogs shall be made available by means of the menu entry
point "topology_configuration".
5.2.2 Device component
Each FDI Communication Package shall contain an EDD element describing the device.
COMPONENT
{
LABEL "";
CAN_DELETE TRUE;
CHECK_CONFIGURATION ;
CLASSIFICATION NETWORK_COMPONENT;
COMPONENT_RELATIONS
{

}
}
COMPONENT_RELATION
{
LABEL "Relation type description";
RELATION_TYPE CHILD_COMPONENT;
ADDRESSING {}
COMPONENTS
{

{
AUTO_CREATE ;
REQUIRED_RANGES
{
{ MIN_VALUE ; MAX_VALUE ;}
}
}
}
MINIMUM_NUMBER ;
MAXIMUM_NUMBER ;
}
: The COMPONENT identifier identifies the component description for
the device type.
: The string value shall contain a string that allows a human user to determine the
function of the FDI Communication Server object.

: The Value refers to the METHOD implementing the module topology
configuration validation function. Implementation details are specified in 5.2.9.
The attribute COMPONENT_RELATIONS allows to describe how modules can be connected. The
definition of the COMPONENT_RELATIONS is optional. If used, it shall describe the relations to
the CommunicationDevice definitions. The construct enables generic FDI Server-driven
(device) topology configuration to be performed. Syntax details are described in IEC 61804-3.
The subsequent text describes the semantic use of the COMPONENT_RELATION construct.
: The attribute value identifies the
COMPONENT_RELATION definition describing the relation between the device component
and the CommunicationDevice component.
: The attribute value has to match with a
COMPONENT identifier used in a COMPONENT declaration that describes a
CommunicationDevice (see 5.2.3).
: The attribute value describes the number of CommunicationDevice
components that can be automatically instantiated with the Device component.
//: The attribute values define the instantiation
constraints. The definition of these attributes is optional. The attribute values can contain
conditional expressions.
The RELATION_TYPE shall be set to CHILD_COMPONENT.
: The attribute value is a reference to a VARIABLE declaration. This VARIABLE
holds the address value for a CommunicationDevice instance. The definition of this attribute is
optional.
/: Values define the address value range for a CommunicationDevice
instance. The value can for example correspond to a physical slot number. Usage of attributes
ADDRESSING and REQUIRED_RANGES enables generic configuration routines.
5.2.3 CommunicationDevice component
Each FDI Communication Package shall contain at least one EDD element describing at least
one CommunicationDevice component. A modular communication hardware structure shall be
described by multiple CommunicationDevice COMPONENT descriptions:
COMPONENT
{
LABEL "";
CAN_DELETE ;
CLASSIFICATION NETWORK_COMPONENT;
COMPONENT_RELATIONS
{

}
}
COMPONENT_RELATION
{
LABEL "Relation between CommunicationDevice and communication service provider";
RELATION_TYPE CHILD_COMPONENT;
ADDRESSING {}
COMPONENTS
{

{
AUTO_CREATE ;
– 16 – IEC 62769-7:2021 © IEC 2021
}
}
MINIMUM_NUMBER 1;
MAXIMUM_NUMBER ;
}
: The COMPONENT identifier identifies the
CommunicationDevice component.
: The string value shall contain a human-readable string that allows a user to easily
determine the function of the CommunicationDevice component.
: Allowed values are TRUE or FALSE. It depends on whether a
CommunicationDevice needs explicit configuration or whether the related communication
service provider object shall be automatically instantiated with the CommunicationDevice. If
the attribute CAN_DELETE is set to FALSE, the CommunicationDevice configuration is static.
The definition of the COMPONENT_RELATIONS is mandatory. It describes the relation to the
communication service provider definition. The construct enables the FDI Server to instantiate
communication service provider components in accordance with communication processing
demands. Syntax details are described in IEC 61804-3. The subsequent text describes the
semantic use of the COMPONENT_RELATION const
...