ISO/IEC 14543-4-302:2023

Information technology - Home Electronic System (HES) architecture — Part 4-302: Application protocols for electrical storage systems and controllers

This part of ISO/IEC 14543 specifies an application-layer protocol important for ensuring interoperability among the products of various manufacturers regarding communications between electrical storage systems and controllers. It uses the network enhanced communications device (NECD) protocol specified in ISO/IEC 14543-4-3. This protocol is based on UDP using IPv4 or IPv6 (TCP is optional).

Technologies de l'information — Architecture des systèmes électroniques domotiques (HES) — Partie 4-302: Protocoles d'application pour les systèmes et les contrôleurs de stockage électriques

General Information

• Status: Published
• Publication Date: 25-Apr-2023
• ICS: 35.240.67 - IT applications in building and construction industry
• Technical Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Drafting Committee: ISO/IEC JTC 1/SC 25 - Interconnection of information technology equipment
• Current Stage: 6060 - International Standard published
• Start Date: 26-Apr-2023
• Due Date: 19-Oct-2024
• Completion Date: 26-Apr-2023

Standards Content (Sample)

ISO/IEC 14543-4-302
Edition 1.0 2023-04
INTERNATIONAL
STANDARD

colour
inside
Information technology – Home electronic system (HES) architecture –
Part 4-302: Application protocols for electrical storage systems and controllers


ISO/IEC 14543-4-302:2023-04(en)

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ISO/IEC 14543-4-302


Edition 1.0 2023-04




INTERNATIONAL



STANDARD








colour

inside










Information technology – Home electronic system (HES) architecture –

Part 4-302: Application protocols for electrical storage systems and controllers


























INTERNATIONAL

ELECTROTECHNICAL

COMMISSION






ICS 35.240.67 ISBN 978-2-8322-6793-6




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

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© ISO/IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviations . 9
4 Conformance . 10
5 Configuration . 10
5.1 General . 10
5.2 Configuration and components . 10
5.3 Connection configuration . 11
6 Application layer . 12
6.1 General . 12
6.2 NECD objects . 12
6.3 NECD services. 12
6.4 Object-specific NECD properties . 12
6.5 Application operation . 14
6.5.1 General . 14
6.5.2 Continuous requests . 14
6.5.3 Response wait time value for controllers . 15
6.5.4 Resending a frame . 15
6.5.5 Processing object property counter . 15
6.5.6 Property values of write requests . 15
7 Normal operation . 16
7.1 General . 16
7.2 Start-up operation . 18
7.2.1 General . 18
7.2.2 Start-up processing of NECD nodes . 18
7.2.3 Search processing . 18
7.2.4 Obtaining NECD attribute information . 18
7.2.5 Obtaining electrical storage system attribute information . 19
7.3 Occasional operation . 22
7.3.1 General . 22
7.3.2 Obtaining electrical storage system status . 22
7.3.3 Setting and updating "AC charge amount target value" property (or "AC
discharge amount target value" property). 25
7.3.4 Setting and updating "Charging electric power setting" property (or
"Discharging electric power setting" property) (optional) . 28
7.3.5 Setting "Charging method" property (or "Discharging method" property)
(optional) . 31
7.3.6 Setting "Operation mode setting" property . 34
7.3.7 Terminating charging (or discharging) operation of the storage battery
based on "AC charging amount target value" property (or "AC
discharging amount target value" property) . 37
7.4 Fault status notification . 41
8 Remote control . 42

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ISO/IEC 14543-4-302:2023 – 3 –
© ISO/IEC 2023
8.1 General . 42
8.2 Setting and updating "AC charge amount target value" property (or "AC
discharge amount target value" property) on remote control . 42
8.3 Setting "Operation mode setting" property when remotely controlling . 44
9 Considerations on controllers . 46
9.1 General . 46
9.2 Restrictions by electrical storage system implementations . 47
Annex A (informative) Terms and NECD protocol frame format on ISO/IEC 14543-4-3
and IEC 62394 . 48
A.1 Terms correspondence between ISO/IEC 14543-4-3 and IEC 62394 . 48
A.2 NECD protocol frame format . 48
Annex B (informative) Relationship between ISO/IEC 14543-4 series and the HES
gateway, based on ISO/IEC 15045 series and ISO/IEC 18012 series . 50
Bibliography . 51

Figure 1 – Relationship between IEC 62394, ISO/IEC 14543-4-3 and
ISO/IEC 14543‑4‑302 . 7
Figure 2 – Example of electrical storage system configuration and components . 10
Figure 3 – Connection configurations . 11
Figure 4 – Assumed network stack . 11
Figure 5 – Summary of normal operation sequences . 17
Figure 6 – Sequence for obtaining NECD attribute information . 19
Figure 7 – Sequence of obtaining electrical storage system attribute information . 21
Figure 8 – Sequence to obtain status of electrical storage systems . 25
Figure 9 – Sequence for setting "AC charge amount target value" property (or "AC
discharge amount target value" property) . 28
Figure 10 – Sequence for setting "Charging electric power setting" property (or
"Discharging electric power setting" property) . 31
Figure 11 – Sequence for setting "Charging method" property (or "Discharging method"
property) . 33
Figure 12 – Sequence for setting "Charging method" property (or "Discharging method"
property) when no response is received from the storage battery . 34
Figure 13 – Sequence for setting "Operation mode setting" property . 36
Figure 14 – Sequence for setting "Operation mode setting" property when no response
is received from the storage battery . 37
Figure 15 – Sequence of terminating charging (discharging) operation based on "AC
charge amount target value" property ("AC discharge amount target value" property) . 40
Figure 16 – Sequence of terminating charge (discharge) operation based on "AC
charge amount target value" property ("AC discharge amount target value" property)
when "Operation mode setting" property is changed . 41
Figure 17 – Remote control . 42
Figure 18 – Example of setting sequence for "AC charge amount target value" property
("AC discharge amount target value" property) when "Remote control setting" property
is used . 44
Figure 19 – Example of setting sequence for "Operation mode setting" property when
"Remote control setting" property is used . 45
Figure 20 – Example of setting sequence for "Operation mode setting" property when
"Remote control setting" property is used, in case that no response is made by
electrical storage system . 46

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© ISO/IEC 2023
Figure A.1 – NECD protocol frame format . 49

Table 1 – NECD objects . 12
Table 2 – NECD services . 12
Table 3 – NECD properties of device object (super class) . 13
Table 4 – NECD properties of device object . 13
Table 5 – Response wait time values for controllers . 15
Table 6 – Re-set wait time for the AC charge (or discharge) amount target value . 27
Table 7 – Wait time for re-setting charging and discharging electric power setting . 30
Table 8 – Wait time for charging and discharging method for re-setting . 32
Table 9 – Wait time for re-setting operation mode . 35
Table A.1 – Terms correspondence table between ISO/IEC 14543-4-3 and IEC 62394 . 48
Table B.1 – Partial list of the translation between ISO/IEC 14543-4-302 and
HES gateway lexicon (ISO/IEC 18012‑3) . 50

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ISO/IEC 14543-4-302:2023 – 5 –
© ISO/IEC 2023
INFORMATION TECHNOLOGY –
HOME ELECTRONIC SYSTEM (HES) ARCHITECTURE –

Part 4-302: Application protocols for electrical
storage systems and controllers


FOREWORD
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9) Attention is drawn to the possibility that some of the elements of this ISO/IEC document may be the subject of
patent rights. IEC and ISO shall not be held responsible for identifying any or all such patent rights.
ISO/IEC 14543-4-302 has been prepared by subcommittee 25: Interconnection of information
technology equipment, of ISO/IEC joint technical committee 1: Information technology. It is an
International Standard.
The list of all currently available parts of the ISO/IEC 14543 series, under the general title
Information technology – Home Electronic System (HES) architecture, can be found on the IEC
website and ISO website.
The text of this International Standard is based on the following documents:
Draft Report on voting
JTC1-SC25/3100/CDV JTC1-SC25/3130/RVC

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.

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© ISO/IEC 2023
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1, available at www.iec.ch/members_experts/refdocs
and www.iso.org/directives.
IMPORTANT – The "colour inside" logo on the cover page of this document 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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ISO/IEC 14543-4-302:2023 – 7 –
© ISO/IEC 2023
INTRODUCTION
This part of ISO/IEC 14543 specifies the detailed procedures and behaviours of both electrical
storage systems and controllers at the application level of communications based on
ISO/IEC 14543-4-3. This document specifies the message structure, sequences and protocol
of the application layer for networked enhanced control devices used in the Home Electronic
System (HES). Some services are targeted for communications between devices. Other
services are exclusively reserved for management purposes. Some services can be used for
both management and run-time communications. This document is applicable for energy
management services involving storage batteries, inverters, chargers and related devices.
Figure 1 shows the relationship among IEC 62394, ISO/IEC 14543-4-3 and
ISO/IEC 14543-4-302. ISO/IEC 14543-4-3 specifies the message structure, sequences and
protocol for general-purpose communications used in network enhanced control devices of the
Home Electronic System (HES) Class 1. ISO/IEC 14543-4-3 provides the common interfaces
for the use-level process and the services such as energy management, remote maintenance,
and other services for easily building a system consisting of multi-vendor devices and
equipment. IEC 62394 specifies the detailed lists of control commands on NECD objects
(see ISO/IEC 14543-4-3). Annex A shows terms and NECD protocol frame format on
ISO/IEC 14543-4-3 and IEC 62394.

Figure 1 – Relationship between IEC 62394, ISO/IEC 14543-4-3 and ISO/IEC 14543‑4‑302
ISO/IEC 14543-4-3 is a general-purpose communications specification that applies to a variety
of devices. ISO/IEC 14543-4-3 is the basis for this document, which specifies detailed
procedures and behaviours for pre-packaged system solutions that include storage batteries,
inverters, chargers and related devices. The procedures and behaviours specified in this
document can be used for energy flow inside a home or energy flow between the grid and a
home.
In order to enhance interoperability, it is important to specify how to implement
ISO/IEC 14543-4-3 for each device and controller at the application level such as command
sequences, timeout requirements, required combinations of acceptable commands, etc.

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© ISO/IEC 2023
INFORMATION TECHNOLOGY –
HOME ELECTRONIC SYSTEM (HES) ARCHITECTURE –

Part 4-302: Application protocols for electrical
storage systems and controllers



1 Scope
This part of ISO/IEC 14543 specifies an application-layer protocol important for ensuring
interoperability among the products of various manufacturers regarding communications
between electrical storage systems and controllers. It uses the network enhanced
communications device (NECD) protocol specified in ISO/IEC 14543-4-3. This protocol is based
on UDP using IPv4 or IPv6 (TCP is optional).
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.
ISO/IEC 14543-4-3, Information technology – Home Electronic System (HES) architecture –
Part 4-3: Application layer interface to lower communications layers for network enhanced
control devices of HES Class 1
IEC 62394, Service diagnostic interface for consumer electronics products and networks –
Implementation for ECHONET
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1.1
battery management unit
BMU
device that manages packs and cells
Note 1 to entry: Examples of management functions: monitoring state, calculating, checking environment, balancing,
etc.
3.1.2
cell
device that can be charged and discharged repeatedly
Note 1 to entry: The typical residential device is a lithium ion battery.

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ISO/IEC 14543-4-302:2023 – 9 –
© ISO/IEC 2023
3.1.3
device object
network enhanced control device (NECD) object other than a node profile object
Note 1 to entry: In this document, "device object" refers to storage battery object only.
3.1.4
electrical storage system
combination of devices that include single or multiple power conditioning systems (PCSs),
battery management units (BMUs), and packs to support primarily residential applications,
including a communications interface
3.1.5
NECD protocol
protocol used in network enhanced control device (NECD) communications
3.1.6
node profile
description of objects implemented in each node
3.1.7
pack
combination of cells
3.1.8
power conditioning system
PCS
device that charges and discharges cells, and translates DC voltage of cells to AC voltage
(e.g. inverter), and AC voltage to DC voltage (e.g. charger) of cells
3.1.9
remote control
control from outside the home
3.1.10
response wait time
time between a controller request to and the response from an electrical storage system
3.1.11
super class
properties that are inherited and implemented in all device objects
3.2 Abbreviations
BMU battery management unit
DNOJ destination NECD object
IP internet protocol
NDATA NECD data
NDT NECD property value data
NECD network enhanced control device
NHD NECD header
NPC NECD property code
NSV NECD service
OPC processing object property counter
PCS power conditioning system

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© ISO/IEC 2023
PDC property data counter
SNOJ source NECD object
TID transaction ID
UDP user datagram protocol
4 Conformance
Electrical storage systems and controllers of HES Class 1 that claim conformance to this
document shall:
– send, receive and process sequences and procedures as specified in Clause 7.
– provide application services and properties specified in 6.2, 6.3 and 6.4 as needed by
electrical storage systems and controllers for which the application is intended.
5 Configuration
5.1 General
Clause 5 specifies the configuration and components of an electrical storage system, and
connection configurations between an electrical storage system and a controller.
5.2 Configuration and components
Figure 2 shows an example of an electrical storage system configuration and components. An
electrical storage system basically includes the device or function of a power conditioning
system (PCS), a battery management unit (BMU), and one or more packs. The electrical storage
system includes the ISO/IEC 14543-4-302 data communications function on the PCS or BMU
in many cases.

Figure 2 – Example of electrical storage system configuration and components

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ISO/IEC 14543-4-302:2023 – 11 –
© ISO/IEC 2023
5.3 Connection configuration
This specification is necessary for ensuring interoperability between the products of different
manufacturers in connection with application communications between electrical storage
systems and controllers, using the NECD protocol as an application protocol via UDP
(TCP)/IPv6 communications.
Figure 3 shows the configurations assumed under this specification.

a
 "Storage battery class object" is a device object specified in IEC 62394.
Figure 3 – Connection configurations
The upper illustration in Figure 3 shows the case where a single device object is installed in a
single node. The lower illustration shows the case where multiple device objects are installed
in a single node. The latter case occurs when multiple battery units are attached to a single
communications unit. In this case, there are multiple storage battery class objects in a single
electrical storage system node (i.e. at a single IP address). Controllers shall support nodes that
configure multiple device objects in a single node.
Controllers shall be capable of handling multiple nodes and objects. The maximum number of
nodes and objects to be handled is implementation-dependent on the controllers. When multiple
controllers are connected to a single system, some electrical storage systems cannot accept a
request from a controller for a certain period of time after the electrical storage system received
a request from another controller.
Figure 4 shows the assumed network stack for operating the NECD protocol in this document.
NECD protocol operation is assumed as an application protocol on UDP(TCP)/IPv6. Note that
TCP installation is optional. As a rule, the stack uses IPv6; however, IPv4 is allowed depending
on the market trends for migration from IPv4 to IPv6.

a
 Depends on transmission media using IPv6.
Figure 4 – Assumed network stack

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© ISO/IEC 2023
Connection processing specific to each lower layer communications medium that is necessary
in advance of the start of NECD communications is out of the scope of this document. In this
document, application communications using the NECD protocol are specified on the
assumption that connection processing specific to those communications media is complete.
6 Application layer
6.1 General
The NECD protocol shall be used at the application layer. All nodes that conform to this
document shall support all mandatory function
...