EN 50090-3-2:2004

SLOVENSKI SIST EN 50090-3-2:2005

STANDARD
september 2005
Stanovanjski in stavbni elektronski sistemi (HBES) – 3-2. del: Vidiki uporabe –
Uporabniški proces za HBES razreda 1
Home and Building Electronic Systems (HBES) – Part 3-2: Aspects of application –
User process for HBES Class 1
ICS 97.120 Referenčna številka
©  Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

EUROPEAN STANDARD EN 50090-3-2
NORME EUROPÉENNE
EUROPÄISCHE NORM February 2004

ICS 97.120 Supersedes EN 50090-3-2:1995

English version
Home and Building Electronic Systems (HBES)
Part 3-2: Aspects of application -
User process for HBES Class 1
Systèmes électroniques pour les foyers Elektrische Systemtechnik für Heim
domestiques et les bâtiments (HBES) und Gebäude (ESHG)
Partie 3-2: Aspects de l'application - Teil 3-2: Anwendungsaspekte -
Processus utilisateur HBES Classe 1 Anwendungsprozess ESHG Klasse 1

This European Standard was approved by CENELEC on 2003-12-02. CENELEC members are bound to
comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in one official version (English). A version in any other language made by
translation under the responsibility of a CENELEC member into its own language and notified to the Central
Secretariat has the same status as the official version.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden,
Switzerland and United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2004 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50090-3-2:2004 E
Contents
Foreword .3
Introduction.4
1 Scope.4
2 Normative references .5
3 Terms, definitions and abbreviations .5
3.1 Terms and definitions .5
3.2 Abbreviations .5
4 Object models .5
5 Group object server .6
5.1 Overview .6
5.2 General data structure group objects.6
5.3 Group object value transfers .9
6 Interface object server.11
6.1 Overview .11
6.2 Address levels for interface objects .13
6.3 Interworking requirements for interface objects .13
6.4 System interface objects (management objects).13
6.5 Application interface objects.13

Figure 1 – User process model .6
Figure 2 – Data structure of group objects .7
Figure 3 – Reading a group object value.10
Figure 4 – Receiving a request to read the group object value .10
Figure 5 – Writing a group object value.11
Figure 6 – Receiving an update of the group object value .11
Figure 7 – Structure of interface objects .12
Figure 8 – Message flow for the A_PropertyValue_Read-service .14
Figure 9 - Message flow for the A_PropertyValue_Write-service .14
Figure 10 - Message flow for the A_PropertyDescription_Read-service.15

Table 1 – Group object types .7

– 3 – EN 50090-3-2:2004
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 205, Home and
Building Electronic Systems (HBES), with the help of CENELEC co-operation partner Konnex Association
(formerly EHBESA).
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC
as EN 50090-3-2 on 2003-12-02.
This European Standard supersedes EN 50090-3-2:1995.
CENELEC takes no position concerning the evidence, validity and scope of patent rights.
Konnex Association as Cooperating Partner to CENELEC confirms that to the extent that the standard
contains patents and like rights, the Konnex Association's members are willing to negotiate licenses
thereof with applicants throughout the world on fair, reasonable and non-discriminatory terms and
conditions.
Konnex Association Tel.: + 32 2 775 85 90
Neerveldstraat, 105 Fax.: + 32 2 675 50 28
Twin House e-mail: info@konnex.org
B - 1200 Brussels www.konnex.org
Attention is drawn to the possibility that some of the elements of this standard may be the subject of
patent rights other than those identified above. CENELEC shall not be held responsible for identifying any
or all such patent rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2004-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2006-12-01
EN 50090-3-2 is part of the EN 50090 series of European Standards, which will comprise the following
parts:
Part 1: Standardization structure
Part 2: System overview
Part 3: Aspects of application
Part 4: Media independent layers
Part 5: Media and media dependent layers
Part 6: Interfaces
Part 7: System management
Part 8: Conformity assessment of products
Part 9: Installation requirements

Introduction
The application interface layer is the layer between the application layer and the application. It contains
the communication relevant tasks of the application. It eases the communication task of the application by
offering a communication interface that abstracts from many application layer details.
This European Standard allows single-processor and dual-processor device designs. A dual processor
device uses additional services to communicate via a serial External Message Interface with the external
user application running in the second processor.
The following clauses specify the client and server functionality and the communication interface of the
internal user application located in the Bus Access Unit (BAU).
The application interface layer contains the following objects and the access routines to them:
– group objects: can be accessed via Transport layer Service Access Points (TSAPs) on
multicast communication services, see the corresponding clause in EN 50090-4-2. Group
objects may also be references to interface objects;
– interface objects: can be accessed via application services on point-to-point connection-
less and point-to-point connection-oriented communication modes. The interface objects are
divided to system interface objects and application interface objects.
– System interface objects are at this time:
− the device object;
− the group address table object;
− the association table object, and
− the application object.
System interface objects are relevant for network management as specified in
EN 50090-7-1.
– Application interface objects are objects defined in the user application. They may be
defined by the internal or external user application, based on interface object structure
rules defined in this document. Application interface objects may also be referenced by a
group object reference.
The following clause specifies the data structures of each of the application interface layer objects.
Additionally they define by which application services these objects are accessible. Both the object client
and object server functionality may be implemented by the external or the internal application interface
layer. It is recommended to locate the group communication objects, the interface objects and the
resource objects in the internal application interface layer.
1 Scope
This part of EN 50090 specifies the structure and functioning of servers for the objects which form the
interface between the application layer and the application and management.

– 5 – EN 50090-3-2:2004
2 Normative references
The following referenced documents are indispensable for the application 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.
1)
EN 50090-1 Home and Building Electronic Systems (HBES) –
Part 1: Standardization structure
EN 50090-4-1:2004 Home and Building Electronic Systems (HBES) –
Part 4-1: Media independent layers – Application layer for HBES Class 1
EN 50090-4-2:2004 Home and Building Electronic Systems (HBES) –
Part 4-2: Media independent layers – Transport layer, network layer and general
parts of data link layer for HBES Class 1
EN 50090-7-1:2004 Home and Building Electronic Systems (HBES) –
Part 7-1: System management – Management procedures
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this part the terms and definitions given in EN 50090-1 and EN 50090-4-1 apply.
3.2 Abbreviations
ASAP Application Layer Service Access Point
BAU Bus Access Unit
EMI External Message Interface
HBES Class 1 refers to simple control and command
HBES Class 2 refers to Class 1 plus simple voice and stable picture transmission
HBES Class 3 refers to Class 2 plus complex video transfers
TSAP Transport layer Service Access Point
4 Object models
This European Standard specifies two different kinds of objects that shall be supported for operational
exchanges:
a) group objects
group objects shall be used to support the shared variable model;
b) interface objects
interface objects shall be used to support the client/server model and, if they are
referenced by group objects, also the shared variable model of the group objects.
An application may use each kind of objects at any time.

———————
1)
At draft stage.
Application
Application Interface Layer
Application
Interface
Group-Objects
Objects
Reference
Interface-
Group-Object-
Object-Server
Server
A- Interface
A-Group
Object-Services Object-Services
Services
Application Layer
Figure 1 – User process model
5 Group object server
5.1 Overview
Group objects can be distributed to a number of devices. Each device may be transmitter and receiver for
group object values. More than one group object can exist in an end device and a group object in a
device may be assigned to one or more group addresses. Group objects of an end device may belong to
the same or to different groups. Each group shall have a network wide unique group address. The group
address shall be mapped to a local group-index (TSAP) by the transport layer; the group-index shall be
unique for the communication services of the device. The application layer shall map the group-index by
the association table to the group reference ID (Application Layer Service Access Point, ASAP) that shall
be used to address the group objects.
5.2 General data structure group objects
5.2.1 Structure
In the sense of the previous clause a group object shall consist of three parts:
a) the group object description;
b) the object-value;
c) the communication-flags.
– 7 – EN 50090-3-2:2004
communication group object
group object description
flags value
object transmission configuration

type priority flags
Figure 2 – Data structure of group objects
5.2.2 Group object description
5.2.2.1 Object type
The following value-types shall be possible:
Table 1 – Group object types
Value Length / Type Value-size
Unsigned Integer (1) 1 bit
Unsigned Integer (2) 2 bit
Unsigned Integer (3) 3 bit
Unsigned Integer (4) 4 bit
Unsigned Integer (5) 5 bit
Unsigned Integer (6) 6 bit
Unsigned Integer (7) 7 bit
Unsigned Integer (8) 1 octet
Unsigned Integer (16) 2 octets
Octet (3) 3 octets
Octet (4) 4 octets
Octet (6) 6 octets
Octet (8) 8 octets
Octet (10) 10 octets
Octet (14) 14 octets
Interface object reference 4 to 14 octets

Only group o
...