1、BSI Standards PublicationHeat metersPart 3: Data exchange and interfacesBS EN 1434-3:2015National forewordThis British Standard is the UK implementation of EN 1434-3:2015. It supersedes BS EN 1434-3:2008 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee P
2、EL/894, Remote Meter Reading.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2
3、015.Published by BSI Standards Limited 2015ISBN 978 0 580 89234 9ICS 17.200.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2015.Amendments/corrigend
4、a issued since publicationDate Text affectedBRITISH STANDARDBS EN 1434-3:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1434-3 December 2015 ICS 17.200.10 Supersedes EN 1434-3:2008English Version Heat meters - Part 3: Data exchange and interfaces Compteurs dnergie thermique - Partie 3 : ch
5、ange de donnes et interfaces Wrmezhler - Teil 3: Datenaustausch und Schnittstellen This European Standard was approved by CEN on 27 September 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of
6、 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)
7、. 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, C
8、yprus, 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
9、Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 143
10、4-3:2015 EBS EN 1434-3:2015EN 1434-3:2015 (E) 2 Contents Page European foreword . 4 1 Scope 5 2 Normative references 5 3 Meter interfaces and protocols overview 6 4 Physical layer 6 4.1 General 6 4.2 Physical layer optical interface 6 4.3 Physical layer M-Bus 6 4.4 Physical layer wireless interface
11、. 6 4.5 Physical layer current loop interface. 7 4.6 Physical layer Local Bus 7 5 Link layer . 7 5.1 Link layer optical interface 7 5.2 Link layer of M-Bus and Local Bus 7 5.3 Link layer wireless interface 7 5.4 Link layer current-loop interface 7 6 Application layer . 8 6.1 Application layer optica
12、l interface . 8 6.2 Application layer M-Bus and Local Bus . 9 7 Application 9 7.1 General 9 7.2 Physical layer 9 7.3 Link layer . 9 7.4 Application layer . 9 7.5 Control applications . 9 Annex A (informative) Recommendation for heat meter test interface . 10 Annex B (informative) Additional informat
13、ion for heat meters 11 B.1 Additional information regarding the EN 62056-21 protocol . 11 B.2 Data set 11 B.3 Coding of the data set identification number . 12 Annex C (informative) Automatic protocol detection and wake-up for the optical interface . 21 C.1 Introduction . 21 C.2 Trying EN 13757-2 pr
14、otocol . 21 C.3 Trying the EN 62056-21 protocol . 21 Annex D (informative) Usage of heat meters in control applications 23 D.1 Heat meter 23 D.2 Controller 24 Annex E (informative) Protection techniques for M-Bus meters against surge/lightning . 26 BS EN 1434-3:2015EN 1434-3:2015 (E) 3 Annex F (info
15、rmative) Additional information about the master-unit for the M-Bus 30 F.1 Master side interface to the M-Bus . 30 F.2 Master side interface for local data read out 30 F.3 Full size level converter . 31 Bibliography . 33 BS EN 1434-3:2015EN 1434-3:2015 (E) 4 European foreword This document (EN 1434-
16、3:2015) has been prepared by Technical Committee CEN/TC 294 “Communication systems for meters”, the secretariat of which is held by DIN. 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 June 2016,
17、and conflicting national standards shall be withdrawn at the latest by June 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This
18、 document supersedes EN 1434-3:2008. The following significant editorial changes compared to the previous edition have been incorporated in this European Standard: a) update of normative references; b) update of Table 1 “Possible combinations of interfaces and standards”; c) addition of explanations
19、 to Table B.1 “Values for “UU“, register codes”. EN 1434 consists of the following parts, under the general title “Heat meters“: Part 1: General requirements Part 2: Constructional requirements Part 4: Pattern approval tests Part 5: Initial verification tests Part 6: Installation, commissioning, ope
20、rational monitoring and maintenance According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugosla
21、v 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 the United Kingdom. BS EN 1434-3:2015EN 1434-3:2015 (E) 5 1 Scope This
22、European Standard specifies the general requirements and applies to heat meters. Heat meters are instruments intended for measuring the energy which in a heat-exchange circuit is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liquid. The meter indicates heat in legal
23、units. Part 3 specifies the data exchange between a meter and a readout device (POINT / POINT communication). For these applications using the optical readout head, the EN 62056-21 protocol is recommended. For direct or remote local readout of a single or a few meters via a battery driven readout de
24、vice, the physical layer of EN 13757-6 (local bus) is recommended. For bigger networks with up to 250 meters, a master unit with AC mains supply according to EN 13757-2 is necessary to control the M-Bus. For these applications the physical and link layer of EN 13757-2 and the application layer of EN
25、 13757-3 is required. For wireless meter communications, EN 13757-4 describes several alternatives of walk/drive-by readout via a mobile station or by using stationary receivers or a network. Both unidirectionally and bidirectionally transmitting meters are supported by this standard. 2 Normative re
26、ferences The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies
27、. EN 13757-2, Communication systems for meters and remote reading of meters Part 2: Physical and link layer EN 13757-3:2013, Communication systems for meters and remote reading of meters Part 3: Dedicated application layer EN 13757-4, Communication systems for meters and remote reading of meters Par
28、t 4: Wireless meter readout (Radio meter reading for operation in SRD bands) EN 13757-6, Communication systems for meters Part 6: Local Bus EN 62056-21:2002, Electricity metering Data exchange for meter reading, tariff and load control Part 21: Direct local data exchange (IEC 62056-21:2002) BS EN 14
29、34-3:2015EN 1434-3:2015 (E) 6 3 Meter interfaces and protocols overview Table 1 Possible combinations of interfaces and standards Hardware interface type Recommended standard Alternative standards Optical EN 62056-21:2002, 3.2 EN 13757-2 EN 62056-21:2002, 4.1 M-Bus EN 13757-2 No alternative Wireless
30、 EN 13757-4 and EN 13757-5 No alternative Current loop EN 62056-21:2002, 3.1 No alternative Local Bus EN 13757-6 No alternative Application layer (All interfaces) EN 13757-3 EN 13757-1 4 Physical layer 4.1 General A meter can have either none or a number of interfaces to communicate with the outside
31、 world. If a meter has an interface in accordance with this standard, it shall fulfil at least one of the following requirements for the physical layer. 4.2 Physical layer optical interface The optical interface is used for local data readout. A hand held unit, equipped with an optical readout head,
32、 is temporarily connected to one heat meter and the data is read out, one heat meter at a time. The physical properties of the optical interface are defined in EN 62056-21. 4.3 Physical layer M-Bus The physical layer of the M-Bus is described in EN 13757-2. It can be used for “point to point“ or for
33、 “multi-point“ communication in bus systems. If a heat meter presents more than one unit load to the bus, the number of unit loads has to be shown on the meter documentation as “xUL” where x is the number of unit loads. Only integer values are allowed. Especially in extended installation, meters wit
34、h an M-Bus interface might need additional protection against surge and lightning. Annex E shows various techniques for either constructing meters with an M-bus interface and integrated enhanced protection elements. In addition, it shows how to construct external protection elements for meters with
35、a standard (unprotected) M-Bus interface. Two variants are given: one (preferred) for situation where a ground connection is available and a variant with weaker protection if no ground connection is available. An enhanced version of the protection additionally protects the meter and its interface fr
36、om destruction if mains power is connected to the M-Bus terminals of the meter. If the readout frequency of the meter is limited either by software or by the battery capacity, the meter documentation shall signal the readout frequency as “x per day”, “y per h” or “z per min” where x, y or z are the
37、number of readouts within the corresponding period allowed by the software without impairing the battery lifetime. Heat meters with unlimited readout frequency do not need such information. 4.4 Physical layer wireless interface The physical layer wireless interface shall be according to EN 13757-4.
38、BS EN 1434-3:2015EN 1434-3:2015 (E) 7 4.5 Physical layer current loop interface Type of signal: 20 mA (CL interface in accordance with EN 62056-21:2002, 4.1 with galvanic separation). Power supply: on the heat meter side, the interface shall be passive. The readout device supplies the necessary powe
39、r. Connections: via terminals or suitable connectors. 4.6 Physical layer Local Bus The Local Bus is an alternative to the M-Bus. It is restricted to small installations (Mini installation/ meter cluster according to EN 13757-2) and optimized for special battery-driven masters. It does not support me
40、ter power supply from the bus. Note that this interface is not compatible with M-Bus masters according to EN 13757-2. Its physical layer is described in EN 13757-6. 5 Link layer 5.1 Link layer optical interface 5.1.1 Link layer optical interface with the EN 13757-2 protocol If the optical interface
41、is used with the EN 13757-2 protocol, a wake-up message can be sent after every idle time of 330 bit times to the heat meter. The wake up message consists of zeroes and ones alternating at the desired baud rate for a duration of (2,2 0,1) s. After an idle time of 33 bit times to 330 bit times, the c
42、ommunication can start. 5.1.2 Link layer optical interface with the EN 62056-21 protocol The link layer optical interface shall be according to EN 62056-21. 5.1.3 Link layer optical interface with automatic protocol recognition If the user or the handheld unit does not know which of the two alternat
43、ive protocols a meter uses, it is suggested to use a combined wake-up and recognition sequence as described in the informative Annex C. 5.2 Link layer of M-Bus and Local Bus The link layer of the M-Bus and the Local Bus is described in EN 13757-2. All required functions shall be implemented in a hea
44、t meter with an M-Bus or Local Bus connector. If the readout frequency of the meter is limited either by software or by the battery capacity, the meter documentation shall signal the readout frequency as “x per day”, “y per h” or “z per min” where x, y or z are the number of readouts within the corr
45、esponding period allowed by the software without impairing the battery lifetime. Heat meters with unlimited readout frequency do not need such information. 5.3 Link layer wireless interface The link layer wireless interface shall be according to EN 13757-4. 5.4 Link layer current-loop interface The
46、link layer current-loop interface shall be according to EN 62056-21:2002, Clause 4 to Clause 5. BS EN 1434-3:2015EN 1434-3:2015 (E) 8 6 Application layer 6.1 Application layer optical interface 6.1.1 Protocol modes according to EN 13757-3 for heat meters Further details are given in the section on t
47、he application layer of the M-Bus. 6.1.2 Protocol modes according to EN 62056-21 for heat meters 6.1.2.1 General This protocol may be used for the optical interface. The basic rules of the protocol are defined in EN 62056-21. Annex B of that document deals with battery operated devices (i.e. some he
48、at meters). The manufacturer ID (identification) mentioned in EN 62056-21 (three upper case letters) is used for heat meters using this protocol in the same manner. For heat meter manufacturers using the data transmission protocol of EN 13757-3, the EN 62056-21 ID is also used to calculate the ID nu
49、mber described in Clause 6 of this standard. The formula stated in EN 13757-3:2013, 5.6 shall be used (see also Annex B). EN 62056-21 describes various modes of operation. All main modes “A“, “B“, “C“ and “D“ are allowed for heat meters. 6.1.2.2 Restrictions for heat meters The EN 62056-21 protocol shall be used with some restrictions. In some cases, EN 62056-21 offers more than one possibility to perform the communication. For communication with heat meters, only the selection described in the following subclauses shall be used. The selecti
