ISO/IEC 14543-4-301:2020

Information technology – Home Electronic System (HES) architecture - Part-4-301: Application protocols for home air conditioners and controllers

ISO/IEC 14543-4-301:2020 specifies an application-layer protocol necessary for ensuring interoperability among the products of various manufacturers regarding communications between home air conditioners and controllers, using a protocol called network enhanced communications device (NECD) as specified in ISO/IEC 14543-4-3. This protocol is based on user datagram protocol (UDP) using IPv4 or IPv6 (TCP is optional).

General Information

• Status: Published
• Publication Date: 21-Jun-2020
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• 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: WG 1 - ISO/IEC JTC 1/SC 25/WG 1
• Current Stage: PPUB - Publication issued
• Start Date: 08-Jul-2020
• Completion Date: 22-Jun-2020

Standards Content (Sample)

ISO/IEC 14543-4-301
Edition 1.0 2020-06
INTERNATIONAL
STANDARD
colour
inside
Information technology – Home Electronic System (HES) architecture –
Part 4-301: Application protocols for home air conditioners and controllers

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ISO/IEC 14543-4-301
Edition 1.0 2020-06
INTERNATIONAL
STANDARD
colour
inside
Information technology – Home Electronic System (HES) architecture –

Part 4-301: Application protocols for home air conditioners and controllers

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 35.240.67 ISBN 978-2-8322-8494-0

– 2 – ISO/IEC 14543-4-301:2020
 ISO/IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 8
4 Conformance . 9
5 Connection configuration . 9
6 Application layer . 10
6.1 General . 10
6.2 NECD objects . 10
6.3 NECD services. 10
6.4 Object-specific NECD properties . 11
6.5 Application operation . 12
6.5.1 General . 12
6.5.2 Continuous requests . 12
6.5.3 Response wait timer value for controllers . 12
6.5.4 Resending a frame . 13
6.5.5 Processing object property counter . 13
6.5.6 Property values of write requests . 13
7 Normal operation . 13
7.1 General . 13
7.2 Start-up operation . 14
7.2.1 General . 14
7.2.2 Start-up processing of NECD nodes . 14
7.2.3 Search processing . 15
7.2.4 Obtaining NECD attribute information . 15
7.2.5 Obtaining home air conditioner attribute information . 16
7.3 Periodical operation . 16
7.4 Occasional operation . 16
7.4.1 General . 16
7.4.2 Obtaining home air conditioner status . 16
7.4.3 Controlling home air conditioners . 17
7.5 Operation during fault status . 18
8 Remote control . 19
8.1 General . 19
8.2 Processes to be carried out by controllers on remote control . 19
9 Considerations on controllers . 22
9.1 General . 22
9.2 Restrictions by home air conditioner implementations . 22
9.3 Processable number of object property counter. 24
9.4 Status synchronization by controllers (periodical operation) . 24
9.5 Reading fault status . 26

 ISO/IEC 2020
Annex A (informative) Terms and NECD frame format on ISO/IEC 14543-4-3 and
IEC 62394. 27
A.1 Terms correspondence between ISO/IEC 14543-4-3 and IEC 62394 . 27
A.2 NECD frame format . 27

Figure 1 – Relationship between IEC 62394, ISO/IEC 14543-4-3 and ISO/IEC 14543-4-301 . 5
Figure 2 – Connection configurations . 9
Figure 3 – Assumed network stack . 10
Figure 4 – Example of normal operation sequences . 14
Figure 5 – Example of sequence for obtaining NECD attribute information . 15
Figure 6 – Sequence to obtain status of home air conditioners. 17
Figure 7 – Sequence to control home air conditioners . 18
Figure 8 – Remote control . 19
Figure 9 – Remote control sequence (properties are written one by one) . 21
Figure 10 – Remote control sequence (properties are written in a batch) . 22
Figure 11 – Status synchronization flow by controllers . 25
Figure 12 – Obtaining detailed fault status information . 26
Figure A.1 – NECD frame format. 28

Table 1 – NECD objects . 10
Table 2 – NECD services . 11
Table 3 – NECD properties of device object (super class) . 11
Table 4 – NECD properties of device object . 12
Table 5 – Response wait timer value for controllers . 12
Table A.1 – Terms correspondence table between ISO/IEC 14543-4-3 and IEC 62394 . 27

– 4 – ISO/IEC 14543-4-301:2020
 ISO/IEC 2020
INFORMATION TECHNOLOGY –
HOME ELECTRONIC SYSTEM (HES) ARCHITECTURE –

Part 4-301: Application protocols for
home air conditioners and controllers

FOREWORD
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International Standard ISO/IEC 14543-4-301 has been prepared by subcommittee 25:
Interconnection of information technology equipment, of ISO/IEC joint technical committee 1:
Information technology.
The list of all currently available parts of the ISO/IEC 14543 series, under the general title
Informati
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