SIST EN 1434-3:2008
(Main)Heat Meters - Part 3: Data exchange and interfaces
Heat Meters - Part 3: Data exchange and interfaces
This European standard applies to heat meters, that is to instruments intended for measuring the heat which, in a heat-exchange circuit, is absorbed or given up by a liquid called the energy-conveying liquid. The meter indicates heat in legal units.
Electrical safety requirements are not covered by this standard.
Part 3 specifies the data exchange between a meter and a read out device (POINT / POINT communication). For these applications using the optical readout head, the EN 62056-21 proto¬col is recommended.
For direct or remote local readout of a single or a few meters via a battery driven readout device the physical layer of EN13757-6 (local bus) is recommended.
For bigger networks with up to 250 meters, a master unit with AC mains supply according to EN13757-2 is necessary to control the M-Bus. For these applications the physical and link layer of EN13757-2 and the application layer of EN13757-3 is required.
For wireless meter communications (pr)EN13757-4 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.
Wärmezähler - Teil 3: Datenaustausch und Schnittstellen
Compteurs d'énergie thermique - Partie 3 : Echange de données et interfaces
La présente Norme internationale s’applique aux compteurs d’énergie thermique, c’est-à-dire aux instruments prévus pour mesurer l’énergie thermique qui, dans un circuit d’échange d’énergie thermique, est absorbée ou abandonnée par un liquide appelé liquide thermique. Le compteur indique l’énergie thermique en unités légales.
Les exigences en matière de sécurité électrique ne sont pas couvertes par la présente norme.
La Partie 3 spécifie l’échange de données entre un compteur et un dispositif de lecture (communication point à point). Pour les applications qui utilisent une tête de lecture optique, le protocole de l'EN 62056-21 est recommandé.
Pour une lecture directe ou locale à distance d’un seul compteur ou de quelques compteurs par l’intermédiaire d’un dispositif de lecture alimenté par batterie, la couche physique de l’EN 13757-6 (bus local) est recommandée.
Pour les réseaux plus importants comportant jusqu’à 250 compteurs, une unité maître disposant d'une alimentation secteur en courant alternatif conforme à l’EN 13757-2 est nécessaire pour commander le M-bus. Pour ces applications, la couche physique et la couche de liaison de l’EN 13757-2 et la couche d’application de l’EN 13757-3 sont requises.
Pour les communications avec compteurs sans fil, l’EN 13757-4 décrit plusieurs alternatives de lectures à pied/en voiture par l’intermédiaire d’un poste mobile ou en utilisant des récepteurs fixes ou un réseau. Les compteurs à transmission unidirectionnelle et les compteurs à transmission bidirectionnelle sont pris en charge par la présente norme.
Toplotni števci - 3. del: Izmenjava podatkov in vmesniki
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Toplotni števci - 3. del: Izmenjava podatkov in vmesnikiWärmezähler - Teil 3: Datenaustausch und SchnittstellenCompteurs d'énergie thermique - Partie 3 : Echange de données et interfacesHeat Meters - Part 3: Data exchange and interfaces17.200.10Toplota. KalorimetrijaHeat. CalorimetryICS:Ta slovenski standard je istoveten z:EN 1434-3:2008SIST EN 1434-3:2008en01-december-2008SIST EN 1434-3:2008SLOVENSKI
STANDARDSIST EN 1434-3:19971DGRPHãþD
SIST EN 1434-3:2008
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1434-3October 2008ICS 17.200.10Supersedes EN 1434-3:1997
English VersionHeat Meters - Part 3: Data exchange and interfacesCompteurs d'énergie thermique - Partie 3 : Echange dedonnées et
interfacesWärmezähler - Teil 3: Datenaustausch und SchnittstellenThis European Standard was approved by CEN on 16 August 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1434-3:2008: ESIST EN 1434-3:2008
EN 1434-3:2008 (E) 2 Contents Page 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.7 4.5 Physical layer current loop interface.7 4.6 Physical layer Local Bus.7 5 Link layer.7 5.1.1 Link layer optical interface with the EN 13757-2 protocol.7 5.1.2 Link layer optical interface with the EN 62056-21 protocol.7 5.1.3 Link layer optical interface with automatic protocol recognition.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.8 6 Application layer.8 6.1 Application layer optical interface.8 6.1.1 Protocol modes according to EN 13757-3 for heat meters.8 6.1.2 Protocol modes according to EN 62056-21 for heat meters.8 6.2 Application layer M-Bus and Local Bus.9 6.2.1 General.9 6.2.2 Coding of data records.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.11 Annex B (informative)
Additional information for heat meters.12 B.1 Additional information regarding the EN 62056-21 protocol.12 B.2 Data set.12 B.3 Coding of the data set identification number.13 B.3.1 Schematic structure.13 B.3.2 Values for “T” group code.13 B.3.3 Values for "UU", register codes.13 B.3.4 Values for "W", number of the tariff.16 B.3.5 Use of "*/&" and "VV" for prestored values.16 B.3.6 Coding of the unit in the data set.17 B.3.7 Coding of the value in the data set.17 B.3.8 Coding of the measured value.18 B.3.9 Coding of the error message.18 B.3.10 Coding of the date and/or time stamp.18 B.3.11 Presentation of related values.19 Annex C (informative)
Automatic protocol detection and wake-up for the optical interface.20 SIST EN 1434-3:2008
EN 1434-3:2008 (E) 3 Annex D (informative)
Usage of heat meters in control applications.22 D.1 Heat meter.22 D.1.1 General.22 D.1.2 Application layer: data records.22 D.1.3 Application: actuality of the data.22 D.1.4 Application layer: acceptable data types (DIFs).23 D.1.5 Application layer: acceptable units (VIFs).23 D.2 Controller.23 D.2.1 Start until first answer.23 D.2.2 Start until first successful readout.24 Annex E (informative)
Protection techniques for M-Bus meters against surge/lightning.25 Annex F (informative)
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
SIST EN 1434-3:2008
EN 1434-3:2008 (E) 4 Foreword This document (EN 1434-3:2008) has been prepared by Technical Committee CEN/TC 294 “Communication systems for meters and remote reading of meters”, the secretariat of which is held by DS. 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 April 2009, and conflicting national standards shall be withdrawn at the latest by April 2009. 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 document supersedes EN 1434-3:1997. 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, operational 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 1434-3:2008
EN 1434-3:2008 (E) 5 1 Scope This European Standard applies to heat meters, that is to instruments intended for measuring the heat which, in a heat-exchange circuit, is absorbed or given up by a liquid called the energy-conveying liquid. The meter indicates heat in legal units. Electrical safety requirements are not covered by this standard. 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 device, 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 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 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. EN 13757-1, Communication system for meters and remote reading of meters — Part 1: Data exchange EN 13757-2:2004, Communication systems for and remote reading of meters — Part 2: Physical and link layer EN 13757-3:2004, Communication systems for and remote reading of meters — Part 3: Dedicated application layer EN 13757-4:2005, Communication systems for meters and remote reading of meters — Part 4: Wireless meter readout (Radio meter reading for operation in the 868 MHz to 870 MHz SRD band) EN 13757-5, Communication systems for meters and remote reading of meters — Part 5: Wireless relaying EN 13757-6, Communication systems for meters and remote reading of 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) SIST EN 1434-3:2008
EN 1434-3:2008 (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, Subclause 4.1 M-Bus
EN 13757-2
No alternative
Wireless Modes S or T of EN 13757-4:2005 Mode R2 of EN 13757-4:2005
Relaying EN 13757-5 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 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, 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 "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 with 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 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 from 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 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. SIST EN 1434-3:2008
EN 1434-3:2008 (E) 7 4.4 Physical layer wireless interface The modes T or S of EN 13757-4:2005 are recommended. They describe uni- or bidirectional communication in the 868 MHz bands optimized for mobile (T-modes) or stationary (S-modes) meter communication. The mode R2 of EN 13757-4:2005 and the optional relaying for this mode according to EN 13757-5 may also be used. 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 power. 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 (Minibus installation according to EN 13757-2:2002, Annex E.6.1 type E) and optimized for special battery-driven masters. It does not support meter 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 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 communi-cation can start. 5.1.2 Link layer optical interface with the EN 62056-21 protocol 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 alternative 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 heat 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 corresponding 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 According to EN 13757-4. SIST EN 1434-3:2008
EN 1434-3:2008 (E) 8 5.4 Link layer current-loop interface According to EN 62056-21:2002, Clause 4 to 5. 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 the 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 heat 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 number described in Clause 6 of this standard. The formula stated in 6.6.1 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 selection is consistent with EN 62056-21.
6.1.2.3 Calculation of block check character The calculation of the block check character shall always be used for the data message sent from the heat meter to the readout device. 6.1.2.4 Syntax diagram The syntax described in EN 62056-21:2002, 5.5 shall be used for heat meters as follows: the wake-up message can be sent from the hand held unit to the heat meter to activate the com-munication facilities in the heat meter; the data message for heat meters shall start with the STX character and end with the ETX and BCC sequence; the data block consists of one or more data lines; each data line may contain up to 78 characters and ends with a CR and LF. SIST EN 1434-3:2008
EN 1434-3:2008 (E) 9 6.1.2.5 Data presentation for heat meter EN 62056-21 does not describe the data presentation of the data message. For users of heat meters from different suppliers, the data coding for data readout application is defined. This data coding shall be used for all modes (A, B, C and D) of the EN 62056-21 protocol. In mode C, it is only used for submode a) "Data readout". The data coding for the other submodes b) "Programming mode" and c) "Supplier specific operation" are a matter of special agreement between supplier and user. The normative Annex B describes the data set and the coding for the readout application of heat meters using this alternative protocol. 6.2 Application layer M-Bus and Local Bus 6.2.1 General This protocol of EN 13757-3 is recommended for the M-Bus and the Local Bus interface. It can be used for the optical interface alternatively and in this case, the heat meter shall be marked with a label “M-Bus” identifying the protocol. Alternatively the application layer of EN 13757-1 may also be used. 6.2.2 Coding of data records Of EN 13757-3 only the variable data structure with low byte first multibyte-elements (CI = 72 h) shall be used. 7 Application 7.1 General The application layer (Clause 6) describes how to code telegrams and data elements. The quoted standards contain many different options for different applications. This clause describes which minimum function of the quoted standards shall be implemented in a heat meter according to this standard. 7.2 Physical layer As a minimum, two baud rates of 300 baud and 2 400 baud shall be implemented. If the heat meter does not support automatic baud rate detection, the commands for baud rate switching and fallback shall be implemented.
7.3 Link layer A heat meter shall support both the primary and the secondary addressing via the link layer. The application shall support the assignment of primary addresses via the M-Bus. All application layer command for managing the secondary addressing mode (including the functions of extended secondary addressing) shall be supported. All application layer commands for managing the secondary address shall be supported. When the user is able to change the secondary address of the meter, the commands for the extended secondary addressing mode shall be supported as well. 7.4 Application layer All readout telegrams shall contain at least the standard header with the meter-ID. The minimum variable data element list shall contain the actual accumulated energy. The default unit shall be the unit on the meter display. The minimum resolution of the accumulated energy shall be the same as on the meter display. The minimum value actuality shall be 15 min. The minimum readout frequency is the readout of up to 250 meters in a segment once per day.
7.5 Control applications Meter suitable for control applications shall fulfil, in addition to the minimum requirements of 7.4, the requirements of Annex D. The suitability of a heat meter with M-Bus interface for such applications may only SIST EN 1434-3:2008
EN 1434-3:2008 (E) 10 be declared (“Suitable for control applications" according to prEN 1434-3:2007, Annex D) in the meter description if all these requirements are met.
SIST EN 1434-3:2008
EN 1434-3:2008 (E) 11 Annex A (informative)
Recommendation for heat meter test interface Modern heat meters are mainly equipped with CMOS microprocessors with a very low power consumption, allowing battery operation. Testing and adjusting of this type of meters needs a completely different approach. Until now, almost every meter type needed its own test equipment to handle the manufacturer's specific requirements. This is a very complicated and expensive way for users of several types of meters and for initial verification institutes. The more different types of heat meters a user has installed, the more testing equipment he may need. An economical testing of several meters should be possible and an easy adaptation to the existing test bench is of great interest.
Since this problem came up, experts have been researching an acceptable solution to it. Details of one example of an acceptable solution are given in AGFW FW 203, "Normierter Wärmezähler-Adapter" [1]. SIST EN 1434-3:2008
EN 1434-3:2008 (E) 12 Annex B (informative)
Additional information for heat meters B.1 Additional information regarding the EN 62056-21 protocol List of "T" group codes. Overview on values in use: "0" = identification (only in connection with value type 0); "1" = reserved for electrical energy active; "2" = reserved for electrical energy reactive; "3" = reserved for electrical energy reserve; "4" = not used; "5" = reserved for energy; "6" = heat meters; "7" = gas meters; "8" = water meters; "9" = reserved for specific identification number or status information; "F" = error identification for meters. NOTE This list is taken from "VEÖ Pflichtenheft für Tarifgeräte" [2]. B.2 Data set
Figure B.1 — Signal direction
As recommended in EN 62056-21:2002, 5.7 each data set (shown diagrammatically above) consists of: SIST EN 1434-3:2008
EN 1434-3:2008 (E) 13 an identification number with the schematic structure; "T" . "UU" . "W" * "VV"
or
"T" . "UU" . "W" & "VV"; "(" as a front boundary character for the value and unit information; "Value": 32 printable characters maximum with the exception of "(", ")", "*", "/" and "!"; decimal points (not commas) shall be included where applicable; "*" as a separator character between value and unit; this separator is not required if there are no units; "Units": 16 printable characters maximum, with the exception of "(", ")", "/" and "!"; ")" as a rear boundary character for the value and unit information. B.3 Coding of the data set identification number B.3.1 Schematic structure
Key 1 Group code, 1 digit 2 Separator, decimal point 3 Type of register, 1 or 2 digits 4 Separator, decimal point 5
Number of the tariff, 1 digit
e.g. 1 = tariff 1; 2 = tariff 2
...9 = tariff 9
6 Separator, 1 character only to be used if the
following value is a stored value:
* Separator: if reset is triggered automatically
(e.g. RCR, RTC)
& Separator: if reset is done manually (e.g. by
push button)
7 Number of pre-stored values, 2 digits, to be used
only if the following value is a stored value Figure B.2 — Schematic structure
B.3.2 Values for “T” group code Relevant values for heat meters are: "0" for the identification, "6" to identify a heat meter and "F" to identify an error message. The code "9" can be used for manufacturer specific status information. For additional information refer to Annex B.3.7. B.3.3 Values for "UU", register codes The "UU" consists of a one or two digit number to identify the measured values. The following numbers shall be used for heat meters. The heat meter shall at least transmit the values for 0, 8 and 26. SIST EN 1434-3:2008
EN 1434-3:2008 (E) 14 0 In connection with group code "0" for identification
The value may consist of maximum 20 characters. 1 Reset number (storage number), two digits from 00 to 99
4 Instantaneous power
The numeri
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