EN 14908-1:2005

SLOVENSKI STANDARD
01-marec-2006
1DGRPHãþD
SIST ENV 13154-2:2005
Odprta izmenjava podatkov v avtomatizaciji stavb in izvršnih elementov ter pri
upravljanju stavb – Protokol regulacijske mreže – 1. del: Protokolarni sklad
Open Data Communication in Building Automation, Controls and Building Management -
Control Network Protocol - Part 1: Protocol Stack
Firmenneutrale Datenkommunikation für die Gebäudeautomation und
Gebäudemanagement - Gebäudedatennetzprotokoll - Teil 1:
Datenprotokollschichtenmodell
Réseau ouvert de communication de données pour l'automatisation, la régulation et la
gestion techniques du bâtiment - Protocole de réseau pour le bâtiment - Partie 1 :
Niveaux du protocole
Ta slovenski standard je istoveten z: EN 14908-1:2005
ICS:
35.240.99 8SRUDEQLãNHUHãLWYH,7QD IT applications in other fields
GUXJLKSRGURþMLK
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 14908-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2005
ICS 97.120 Supersedes ENV 13154-2:1998
English Version
Open Data Communication in Building Automation, Controls and
Building Management - Building Network Protocol - Part 1:
Protocol Stack
Réseau ouvert de communication de données pour Firmenneutrale Datenkommunikation für die
l'automatisation, la régulation et la gestion techniques du Gebäudeautomation und Gebäudemanagement -
bâtiment - Protocole de réseau pour le bâtiment - Partie 1 : Gebäudedatennetzprotokoll - Teil 1:
Niveaux du protocole Datenprotokollschichtenmodell
This European Standard was approved by CEN on 11 August 2005.
CEN 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 CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14908-1:2005: E
worldwide for CEN national Members.

Contents           page
Foreword. 7
Introduction . 8
1 Scope. 9
2 Normative references. 9
3 Terms and definitions . 9
4 Symbols and abbreviations . 11

4.1 Symbols and Graphical Representations . 11
4.2 Abbreviations. 13
5 Overview of Protocol Layering. 13
6 MAC Sublayer . 15
6.1 Service Provided . 15
6.2 Interface to the Link Layer . 15
6.3 Interface to the Physical Layer. 16

6.4 MPDU Format. 17
6.5 Predictive p-persistent CSMA — Overview Description. 18
6.6 Idle Channel Detection. 19
6.7 Randomising. 19
6.8 Backlog Estimation . 19
6.9 Optional Priority . 20
6.10 Optional Collision Detection. 21
6.11 Beta1, Beta2 and Preamble Timings . 22
7 Link Layer . 24

7.1 Assumptions. 24
7.2 Service Provided . 24
7.3 CRC. 24
7.4 Transmit Algorithm. 25
8 Network Layer. 25
8.1 Assumptions. 25
8.2 Service Provided . 27
8.3 Service Interface. 27
8.4 Internal Structuring of the Network Layer . 28
8.5 NPDU Format . 28
8.6 Address Recognition. 29
8.7 Routers. 29
8.8 Routing Algorithm . 30
8.9 Learning Algorithm — Subnets . 30
9 Transaction Control Sublayer. 30
9.1 Assumptions. 30
9.2 Service Provided . 31
9.3 Service Interface. 31
9.4 State Variables. 32
9.5 Transaction Control Algorithm. 32
10 Transport Layer . 32
10.1 Assumptions. 32

10.2 Service Provided . 33
10.3 Service Interface. 34
10.4 TPDU Types and Formats . 34
10.5 Protocol Diagram.35
10.6 Transport Protocol State Variables .36
10.7 Send Algorithm .36
10.8 Receive Algorithm .37
10.9 Receive Transaction Record Pool Size and Configuration Engineering .37
10.9.1 General .37
10.9.2 Number of Retries.37
10.9.3 Transport Layer Timers.39
11 Session Layer .39
11.1 Assumptions .39
11.2 Service Provided.40
11.3 Service Interface .40
11.4 Internal Structure of the Session Layer .41
11.5 SPDU Types and Formats .41

11.6 Protocol Timing Diagrams .43
11.7 Request-Response State Variables.46
11.8 Request-Response Protocol — Client Part.46
11.9 Request-Response Protocol — Server Part.46
11.10 Request-Response Protocol Timers .47
11.11 Authentication Protocol .47
11.12 Encryption Algorithm .47
11.13 Retries and the Role of the Checksum Function.48
11.14 Random Number Generation .49
11.15 Using Authentication.49
12 Presentation/Application Layer .49
12.1 Assumptions .49
12.2 Service Provided.49
12.3 Service Interface .50
12.4 APDU Types and Formats.51
12.5 Protocol Diagrams.52
12.6 Application Protocol State Variables .54
12.7 Request - Response Messaging in Offline State .55
12.8 Network Variables.55
12.8.1 General .55
12.8.2 Network Variable Processing.55
12.9 Error Notification to the Application Program.56
12.9.1 General .56
12.9.2 Error Notification for Messages.56
12.9.3 Error Notification for Network Variables.56
13 Network Management & Diagnostics .57
13.1 Assumptions .57
13.2 Services Provided.57
13.3 Network Management and Diagnostics Application Structure .57
13.4 Node States .57
13.5 Using the Network Management Services .58
13.5.1 General .58
13.5.2 Addressing Considerations .58
13.5.3 Making Network Configuration Changes .59
13.5.4 Downloading an Application Program .59

13.5.5 Error Handling Conditions (Informative).60
13.6 Using Router Network Management Commands .62
13.7 NMPDU Formats and Types .63
13.7.1 General .63
13.7.2 Query ID.63
13.7.3 Respond to Query.64
13.7.4 Update Domain.64
13.7.5 Leave Domain .64
13.7.6 Update Key.64
13.7.7 Update Address . 64
13.7.8 Query Address. 64
13.7.9 Query Network Variable Configuration. 65
13.7.10 Update Group Address . 65
13.7.11 Query Domain. 65
13.7.12 Update Network Variable Configuration . 65
13.7.13 Set Node Mode. 65
13.7.14 Read Memory. 66
13.7.15 Write Memory. 66
13.7.16 Checksum Recalculate. 66
13.7.17 Install. 66
13.7.18 Memory Refresh . 82
13.7.19 Query SI. 82
13.7.20 Network Variable Value Fetch. 82
13.7.21 Manual Service Request Message . 82
13.7.22 Network Management Escape Code . 82

13.7.23 Router Mode. 83
13.7.24 Router Clear Group or Subnet Table. 83
13.7.25 Router Group or Subnet Table Download . 83
13.7.26 Router Group Forward . 83
13.7.27 Router Subnet Forward. 84
13.7.28 Router Do Not Forward Group. 84
13.7.29 Router Do Not Forward Subnet . 84
13.7.30 Router Group or Subnet Table Report. 84
13.7.31 Router Status. 84
13.7.32 Router Half Escape Code. 84
13.8 DPDU Types and Formats. 84
13.8.1 General . 84
13.8.2 Query Status . 84
13.8.3 Proxy Status. 88
13.8.4 Clear Status. 88
13.8.5 Query Transceiver Status . 88
Annex A Reference Implementation (Normative). 89
A.1 General . 89
A.2 Predictive CSMA Algorithm . 89
A.3 LPDU Transmit Algorithm. 148
A.4 LPDU Receive Algorithm . 150
A.5 Routing Algorithm . 153
A.6 Learning Algorithm. 153
A.7 Transaction Control Algorithm. 154
A.8 Network Layer Algorithm . 161
A.9 TPDU and SPDU Send Algorithm with Authentication . 177
A.10 Application Layer . 232
A.11 Network Management Commands . 287
A.12 Configuration Data Structures. 324
A.13 Include Files for the Reference Implementation . 343
A.14 Application Protocol State Variables and Address Recognition Structures . 373
A.15 Query-id Data Structures . 375
A.16 Respond to Query Data Structure . 376
A.17 Update Domain Data Structures. 376
A.18 Leave Domain Data Structures. 376
A.19 Update Key Data Structures . 376
A.20 Update Address Data Structures. 377
A.21 Query Address Data Structures . 378
A.22 Query NV Cnfg Data Structures. 378
A.23 Update Group Address Data Structures . 378
A.24 Query Domain Data Structures. 378
A.25 Update Network Variable Configuration Data Structures. 379
A.26 Set Node Mode Data Structures . 379
A.27 Read Memory Data Structures.380
A.28 Write Memory Data Structures.380
A.29 Checksum Recalculate Data Structures.380
A.30 Install Command Data Structures.381
A.31 Memory Refresh Data Structures .389
A.32 Query SI Data Structures.389
A.33 NV Fetch Data Structures.390
A.34 Manual Service Request Message Data Structures .390
A.35 Product Query Data Structures .390
A.36 Router Mode Data Structures .390
A.37 Router Table Clear Group or Subnet Table Data Structures .391
A.38 Router Group or Subnet Download Data Structures.391
A.39 Router Group Forward Data Structures .391
A.40 Router Subnet Forward Data Structures.391
A.41 Router Group No-Forward Data Structures .392
A.42 Router Subnet No-Forward Data Structures.392

A.43 Group / Subnet Table Report Data Structures.392
A.44 Router Status Data Structures.392
A.45 Query Status Data Structures .393
A.46 Proxy Status Data Structures .393
A.47 Clear Status Data Structures .394
A.48 Query Transceiver Status Data Structures .394
Annex B Additional Data Structures (Normative).395
B.1 General .395
B.1.1 The System Image .395

B.1.2 The Application Image.395
B.1.3 The Network Image.396
B.2 Read-Only Structures .396
B.2.1 Fixed Read-Only Data Structures .396
B.2.2 Read-only Structure Field Descriptions.398
B.3 Domain Table .401
B.3.1 Domain Table Field Descriptions.402
B.4 Address Table .402
B.4.1 Declaration of Group Address Format .403
B.4.2 Group Address Field Descriptions.403
B.4.3 Declaration of Subnet/Node Address Format.404
B.4.4 Subnet/Node Address Field Descriptions.404
B.4.5 Declaration of Broadcast Address Format .404
B.4.6 Broadcast Address Field Descriptions .404
B.4.7 Declaration of Turnaround Address Format.405
B.4.8 Turnaround Address Field Descriptions.405
B.4.9 Declaration of Protocol Processor’s Address Format .405
B.4.10 Protocol Processor Address Field Descriptions.405
B.4.11 Timer Field Descriptions .406
B.5 Network Variable Tables - Informative .407
B.5.1 Network Variable Configuration Table Field Descriptions - Informative .408
B.5.2 Network Variable Alias Table Field Descriptions - Informative .409
B.5.3 Network Variable Fixed Table Field Descriptions - Informative .409
B.6 Self-Identification Structures .409
B.6.1 SI Structure Field Descriptions.410
B.6.2 NV Descriptor Table Field Descriptions.411
B.6.3 SNVT Table Extension Records.411
B.6.4 SNVT Alias Field Descriptions.412
B.6.5 Version 2 SI Data.412
B.7 Configuration Structure.416
B.7.1 General .416
B.7.2 Configuration Structure Field Descriptions.417
B.8 Statistics Relative Structure .418
Annex C Behavioral Characteristics (Informative).420
C.1 Channel Capacity and Throughput . 420
C.2 Network Metrics . 421
C.3 Transaction Metrics. 422
C.4 Boundary Conditions — Power-Up . 423
C.5 Boundary Conditions — High Load. 423
Annex D PDU Summary (Normative) . 424
Annex E Naming and Addressing (Normative) . 426
E.1 Address Types and Formats. 426
E.2 Domains . 426
E.3 Subnets and Nodes . 427
E.4 Groups. 427
E.5 Unique_Node_ID and Node Address Assignment . 428
E.6 NPDU Addressing. 429
Annex F List of patents that pertain to this European Standard (Normative) . 431
Bibliography . 434

Foreword
This European Standard (EN 14908-1:2005) has been prepared by CEN /TC 247, "Building Automation, Controls
and Building Management", the secretariat of which is held by SNV.
This European Standard shall be given the status of a national standard, either by publication of an identical text or
by endorsement, at the latest by May 2006, and conflicting national standards shall be withdrawn at the latest by
May 2006.
This European Standard supersedes ENV 13154—2:1998.
This publication is copyright under the Berne Convention and the Universal Copyright Convention. No part of this
publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by means, electronic,
mechanical, photocopying, recording, or otherwise, without the permission of the European Committee for
Standardization (CEN), the European Committee for Electrotechnical Standardization (CENELEC), their National
Standards Bodies and their Licensees to reproduce this European Standard in full and including this copyright
notice for the purposes of European standardisation.
CEN draws attention to the fact that it is claimed that compliance with this European Standard may involve the use
of patents. The patents that pertain to this European Standard are listed in Annex F.
CEN/TC247 confirms that this European Standard contains patents and like rights claiming by Echelon Corporation.
The Echelon Corporation declared to CEN its willingness to negotiate licenses under patents or rights with
applicants throughout the world on reasonable terms and conditions without any discrimination.
NOTE For licensing information, contact: Echelon Corporation, 4015 Meridian Avenue, San Jose, CA 94304, USA, phone
+1-408-938-5234, fax: +1-408-790-3800 http://www.echelon.com.
This European Standard is part of a series of European Standards for open data transmission in building
automation, control and in building management systems. The content of this standard covers the data
communications used for management, automation/control and field functions. This European Standard is based
on the American standards EIA/CEA-709.1-B Control Network Protocol Specification.
The EN 14908-1 is part of a series of European Standards under the general title Control Network Protocol (CNP),
which comprises the following parts:
Part 1: Protocol Stack
Part 2: Twisted Pair Communication
Part 3: Power Line Channel Specification
Part 4: IP-Communication
Part 5 : Project Implementation Guideline
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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.
Introduction
This European Standardhas been prepared to provide mechanisms through which various vendors of building
automation, control, and building management systems may exchange information in a standardised way. It
defines communication capabilities.
This European Standard is to be used by all involved in design, manufacture, engineering, installation and
commissioning activities.
This European Standard has been made in response to the essential requirements of the Constructive Products
Directive.
1 Scope
This specification applies to a communication protocol for networked control systems. The protocol provides peer-
to-peer communication for networked control and is suitable for implementing both peer-to-peer and master-slave
control strategies. This specification describes services in layers 2 - 7. In the layer 2 (data link layer) specification,
it also describes the MAC sub-layer interface to the physical layer. The physical layer provides a choice of
transmission media. The interface described in this specification supports multiple transmission media at the
physical layer. In the layer 7 specification, it includes a description of the types of messages used by applications
to exchange application and network management data.
2 Normative references
Not applicable
3 Terms and definitions
For the purposes of this European Standard, the following subclause introduces the basic terminology employed
throughout this European Standard. Most of it is commonly used and the terms have the same meaning in both the
general and the standard context. However, for s
...