EN 14908-4:2014
(Main)Open Data Communication in Building Automation, Controls and Building Management - Control Network Protocol - Part 4: IP Communication
Open Data Communication in Building Automation, Controls and Building Management - Control Network Protocol - Part 4: IP Communication
This European Standard specifies the transporting of the Control Network Protocol (CNP) packets for commercial Building Automation, Controls and Building Management over Internet Protocol (IP) networks using a tunnelling mechanism wherein the CNP packets are encapsulated within IP packets. It applies to both CNP nodes and CNP routers.
The purpose of this European Standard is to ensure interoperability between various CNP devices that wish to use IP networks to communicate using the CNP protocol.
The main body of this European Standard is independent of the CNP protocol being transported over the IP network. The reader is directed to Annex A and Annex B for the normative and informative, respectively, aspects of this specification that are specific to EN 14908-1.
Figure 1 shows a possible configuration of such CNP devices and networks connected to an IP network.
Figure 1 depicts two types of CNP devices: CNP nodes and CNP routers. It should be noted that the routers shown can route packets between typical CNP channels (such as twisted pair or power line) and an IP channel or it can route CNP packets between two IP channels. In this European Standard the IP channel will be defined in such a way to allow it to be used like any other CNP channel.
In the above diagram, the IP network can be considered to be one or more IP channels. This European Standard covers only how CNP packets are transported over IP channels. It does not cover how CNP packets are routed between standard CNP channels and IP channels. This specification is not intended to cover the lower layers (physical, MAC and link layers) of either standard CNP or IP channels.
Offene Datenkommunikation für die Gebäudeautomation und Gebäudemanagement – Gebäude-Netzwerk-Protokoll — Teil 4: Kommunikation mittels Internet Protokoll (IP)
Réseau ouvert de communication de données pour l'automatisation, la régulation et la gestion technique du bâtiment - Protocole de contrôle du réseau - Partie 4: Communication par IP
La présente Norme européenne spécifie le transport des paquets du protocole de réseau CNP (Control Network Protocol) pour l'automatisation, la régulation et la gestion technique des bâtiments commerciaux sur le protocole IP (Internet Protocol) en utilisant un mécanisme d’encapsulation où les paquets CNP sont encapsulés dans les paquets IP. Elle s’applique autant aux nœuds CNP qu’aux routeurs CNP.
L’objectif de la présente Norme européenne est d’assurer l’interopérabilité entre différents équipements CNP qui désirent utiliser les réseaux IP pour communiquer avec le protocole CNP.
La partie principale de la présente Norme européenne est indépendante du protocole CNP, celui qui est transporté par le réseau IP. Le lecteur est invité à lire l’Annexe A et l’Annexe B pour les aspects respectivement normatifs et informatifs de cette spécification, spécifiques au document FprEN 14908-1.
La Figure 1 montre une configuration possible de tels équipements CNP et les réseaux connectés à un réseau IP.
La Figure 1 représente deux types d’équipements CNP : les nœuds et routeurs CNP. Il convient de noter que les routeurs peuvent router des paquets entre des canaux CNP typiques (tels que paires torsadées ou courants porteurs) et un canal IP, il peut aussi router des paquets entre deux canaux IP. Dans la présente Norme européenne, le canal IP sera défini de telle façon qu’il permette d’être utilisé comme n’importe quel autre canal CNP.
Dans le diagramme ci-dessus, le réseau IP peut être considéré comme un ou plusieurs canaux IP. La présente Norme européenne couvre seulement la manière dont sont transportés des paquets CNP sur des canaux IP. Elle ne s'intéresse pas à la manière dont les paquets CNP sont routés entre des canaux CNP standard et des canaux IP. Cette spécification n’est pas destinée à couvrir les couches basses : c'est-à-dire les couches physiques, réseau (MAC) et liaison.
Odprta izmenjava podatkov v avtomatizaciji stavb in izvršnih elementov ter pri upravljanju stavb - Protokol regulacijske mreže - 4. del: Komunikacija IP
Standard EN 14908-4 določa prenos paketov protokola regulacijskega omrežja (CNP) za avtomatizacijo stavb in izvršnih elementov ter upravljanje stavb prek IP-omrežij z uporabo tunelskega mehanizma, kjer so paketi CNP vgnezdeni v pakete IP. Velja tako za vozlišča CNP kot za usmerjevalnike CNP. Namen tega evropskega standarda je zagotavljanje interoperabilnosti med različnimi napravami CNP, ki komunicirajo prek omrežij IP z uporabo protokola CNP. Glavni del tega evropskega standarda je neodvisen od protokola CNP, ki se prenaša prek omrežja IP. Bralec naj se za normativne in informativne vidike te specifikacije, ki so specifični za standard EN 14908-1, obrne na Dodatek A in Dodatek B.
General Information
Relations
Overview
EN 14908-4:2014 (EN 14908-4) defines how the Control Network Protocol (CNP) is transported over Internet Protocol (IP) networks for building automation, controls and building management. The standard specifies a tunnelling mechanism where CNP packets are encapsulated inside IP packets so that an IP channel can be used like any other CNP channel. Its primary purpose is to ensure interoperability between CNP devices (CNP nodes and CNP routers) that communicate over IP networks. The document is independent of the CNP message set (see Annex A/B for CNP-specific references) and does not cover lower-layer details (physical, MAC or link layers) or the internal routing logic between non-IP CNP channels and IP channels.
Key topics and technical requirements
- Tunnelling / encapsulation: rules for encapsulating CNP packets within IP packets so IP acts as a CNP channel.
- CNP/IP device specification: mandatory device behaviors and parameters for CNP nodes and CNP routers when using IP channels.
- IP channel definition and transport mechanisms: how an IP network is represented as one or more CNP channels and guidance on transport methods.
- Message handling: definitions for CNP/IP message types, common headers, packet segmentation and reassembly, out-of-order and duplicate packet handling, and stale packet detection.
- Configuration and registration: device configuration parameters, registration with configuration servers, channel membership, send lists and related management interactions.
- Operational status and diagnostics: device health, status messages and statistics reporting.
- Security and authentication: mechanisms for authenticating CNP packets over IP (scope limited to the protocol interactions described).
- Vendor-specific extensions: provisions for vendor messages while maintaining interoperability.
Practical applications and who uses this standard
- System designers and integrators implementing building automation systems that combine CNP field devices with IP infrastructure.
- Manufacturers of CNP/IP nodes and routers ensuring conformance to interoperable transport behavior.
- Network engineers and commissioning teams deploying IP-based building control networks, performing device registration and channel configuration.
- Facility managers and integrators looking to enable remote monitoring, management and scalable building management using existing IP networks.
Note: EN 14908-4 specifies transport over IP; routing strategies between non-IP CNP media and IP channels may involve other parts of the CNP series or vendor solutions.
Related standards
- EN 14908-1: Control Network Protocol - Protocol stack
- EN 14908-2: Twisted pair communication
- EN 14908-3: Power line channel specification
- EN 14908-5: Implementation
- EN 14908-6: Application elements
Keywords: EN 14908-4, CNP/IP, Control Network Protocol, tunnelling, building automation, IP communication, CNP router, CNP node, interoperability.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Odprta izmenjava podatkov v avtomatizaciji stavb in izvršnih elementov ter pri upravljanju stavb - Protokol regulacijske mreže - 4. del: Komunikacija IPFirmenneutrale Datenkommunikation für die Gebäudeautomation und Gebäudemanagement - Gebäudedatennetzprotokoll - Teil 4: Kommunikation mittels Internet Protokoll (IP)Réseau ouvert de communication de données pour l'automatisation, la régulation et la gestion technique du bâtiment - Protocole de contrôle du réseau - Partie 4: Communication par IPOpen Data Communication in Building Automation, Controls and Building Management - Control Network Protocol - Part 4: IP Communication97.120Avtomatske krmilne naprave za domAutomatic controls for household use35.240.99IT applications in other fieldsICS:Ta slovenski standard je istoveten z:EN 14908-4:2014SIST EN 14908-4:2014en,fr,de01-julij-2014SIST EN 14908-4:2014SLOVENSKI
STANDARDSIST EN 14908-4:20071DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14908-4
April 2014 ICS 35.240.99; 91.140.01; 97.120 Supersedes EN 14908-4:2006English Version
Open Data Communication in Building Automation, Controls and Building Management - Control Network Protocol - Part 4: IP Communication
Réseau ouvert de communication de données pour l'automatisation, la régulation et la gestion technique du bâtiment - Protocole de contrôle du réseau - Partie 4: Communication par IP
Offene Datenkommunikation für die Gebäudeautomation und Gebäudemanagement - Gebäude-Netzwerk-Protokoll -Teil 4: Kommunikation mittels Internet Protokoll (IP) This European Standard was approved by CEN on 12 April 2013.
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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14908-4:2014 ESIST EN 14908-4:2014
Foreword . 4 Introduction . 5 1 Scope. 6 2 Normative references . 6 3 Terms, definitions and abbreviations . 7 3.1 Terms and definitions . 7 3.2 Abbreviations . 8 4 Requirements . 8 5 CNP/IP device specification . 9 5.1 IP Related device specifications . 9 5.2 CNP related device specifications . 9 5.2.1 Packet formats . 9 5.2.2 Addressing schemes . 9 6 IP channel . 10 6.1 Specification . 10 6.2 IP transport mechanisms . 12 6.2.1 General . 12 6.2.2 Informative considerations . 13 7 CNP/IP device . 13 7.1 Configuration of a CNP/IP device . 13 7.2 Configuration parameters . 14 7.2.1 General . 14 7.2.2 Channel definition parameters . 14 7.2.3 Send List arameters . 15 7.2.4 Device parameters . 15 7.3 Configuration techniques. 15 7.3.1 General . 15 7.3.2 Manual configuration . 16 7.3.3 BOOTP and DHCP . 16 7.3.4 Configuration servers . 16 8 CNP/IP messages . 17 8.1 Definition of CNP/IP messages and modes of operation . 17 8.2 Common message header . 17 8.3 Packet segmentation . 19 8.3.1 Overview . 19 8.3.2 Segment exchange . 20 8.3.3 Discussion . 21 8.4 Data packet exchange . 22 8.4.1 General . 22 8.4.2 Out of order packets . 23 8.4.3 Duplicate packet detection . 24 8.4.4 Stale packet detection . 24 8.5 Configuration server interactions . 25 SIST EN 14908-4:2014
Specifications for the CNP standard . 59 Annex B (informative)
Specifications for CNP. 61 Bibliography . 62
Figure 1 — Typical CNP/IP application Figure 1 depicts two types of CNP devices: CNP nodes and CNP routers. It should be noted that the routers shown can route packets between typical CNP channels (such as twisted pair or power line) and an IP channel or it can route CNP packets between two IP channels. In this European Standard the IP channel will be defined in such a way to allow it to be used like any other CNP channel. In the above diagram, the IP network can be considered to be one or more IP channels. This European Standard covers only how CNP packets are transported over IP channels. It does not cover how CNP packets are routed between standard CNP channels and IP channels. This specification is not intended to cover the lower layers (physical, MAC and link layers) of either standard CNP or IP channels. 2 Normative references Not applicable. SIST EN 14908-4:2014
device that uses the CNP protocol to communicate with other CNP devices Note 1 to entry: Specifically, a CNP/IP device is a CNP device that communicates with other CNP devices over an IP channel. 3.1.4
CNP router special type of CNP device that routes CNP protocol packets between two or more channels Note 1 to entry: Specifically, a CNP/IP router is a CNP router in which at least one of the channels it routes packets over is an IP channel. 3.1.5
CNP node special type of CNP device that can send or receive CNP protocol packets, but does not route them between channels Note 1 to entry: Specifically a CNP/IP node is a CNP node in which at least one of the channels it sends and receives packets over is an IP channel. Note 2 to entry: All CNP devices are either routers, nodes or both. 3.1.6
CNP group collection of CNP devices that share a common multicast address 3.1.7
node ID logical network address that differentiates nodes within the same subnet or domain 3.1.8
Must Be Zero (MBZ) reserved field that may be used in the following versions of the protocol SIST EN 14908-4:2014
Figure 2 — IP protocol stack As depicted in Figure 2 the three most common mechanisms used to transport IP packets are the following: SIST EN 14908-4:2014
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Frequently Asked Questions
EN 14908-4:2014 is a standard published by the European Committee for Standardization (CEN). Its full title is "Open Data Communication in Building Automation, Controls and Building Management - Control Network Protocol - Part 4: IP Communication". This standard covers: This European Standard specifies the transporting of the Control Network Protocol (CNP) packets for commercial Building Automation, Controls and Building Management over Internet Protocol (IP) networks using a tunnelling mechanism wherein the CNP packets are encapsulated within IP packets. It applies to both CNP nodes and CNP routers. The purpose of this European Standard is to ensure interoperability between various CNP devices that wish to use IP networks to communicate using the CNP protocol. The main body of this European Standard is independent of the CNP protocol being transported over the IP network. The reader is directed to Annex A and Annex B for the normative and informative, respectively, aspects of this specification that are specific to EN 14908-1. Figure 1 shows a possible configuration of such CNP devices and networks connected to an IP network. Figure 1 depicts two types of CNP devices: CNP nodes and CNP routers. It should be noted that the routers shown can route packets between typical CNP channels (such as twisted pair or power line) and an IP channel or it can route CNP packets between two IP channels. In this European Standard the IP channel will be defined in such a way to allow it to be used like any other CNP channel. In the above diagram, the IP network can be considered to be one or more IP channels. This European Standard covers only how CNP packets are transported over IP channels. It does not cover how CNP packets are routed between standard CNP channels and IP channels. This specification is not intended to cover the lower layers (physical, MAC and link layers) of either standard CNP or IP channels.
This European Standard specifies the transporting of the Control Network Protocol (CNP) packets for commercial Building Automation, Controls and Building Management over Internet Protocol (IP) networks using a tunnelling mechanism wherein the CNP packets are encapsulated within IP packets. It applies to both CNP nodes and CNP routers. The purpose of this European Standard is to ensure interoperability between various CNP devices that wish to use IP networks to communicate using the CNP protocol. The main body of this European Standard is independent of the CNP protocol being transported over the IP network. The reader is directed to Annex A and Annex B for the normative and informative, respectively, aspects of this specification that are specific to EN 14908-1. Figure 1 shows a possible configuration of such CNP devices and networks connected to an IP network. Figure 1 depicts two types of CNP devices: CNP nodes and CNP routers. It should be noted that the routers shown can route packets between typical CNP channels (such as twisted pair or power line) and an IP channel or it can route CNP packets between two IP channels. In this European Standard the IP channel will be defined in such a way to allow it to be used like any other CNP channel. In the above diagram, the IP network can be considered to be one or more IP channels. This European Standard covers only how CNP packets are transported over IP channels. It does not cover how CNP packets are routed between standard CNP channels and IP channels. This specification is not intended to cover the lower layers (physical, MAC and link layers) of either standard CNP or IP channels.
EN 14908-4:2014 is classified under the following ICS (International Classification for Standards) categories: 35.240.67 - IT applications in building and construction industry; 35.240.99 - IT applications in other fields; 91.140.01 - Installations in buildings in general; 97.120 - Automatic controls for household use. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 14908-4:2014 has the following relationships with other standards: It is inter standard links to EN 14908-4:2006. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 14908-4:2014 is associated with the following European legislation: Standardization Mandates: M/490. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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