BS EN 1434-3:2015 – TC:2020 Edition
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Tracked Changes. Heat meters – Data exchange and interfaces
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 79 |
This 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 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 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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | Tracked_Changes_Cover |
| 3 | 30318672_Final |
| 47 | European foreword |
| 48 | 1 Scope 2 Normative references |
| 49 | 3 Meter interfaces and protocols overview Table 1 — Possible combinations of interfaces and standards 4 Physical layer 4.1 General 4.2 Physical layer optical interface 4.3 Physical layer M-Bus 4.4 Physical layer wireless interface |
| 50 | 4.5 Physical layer current loop interface 4.6 Physical layer Local Bus 5 Link layer 5.1 Link layer optical interface 5.1.1 Link layer optical interface with the EN 13757-2 protocol 5.1.2 Link layer optical interface with the EN 62056-21 protocol 5.1.3 Link layer optical interface with automatic protocol recognition 5.2 Link layer of M-Bus and Local Bus 5.3 Link layer wireless interface 5.4 Link layer current-loop interface |
| 51 | 6 Application layer 6.1 Application layer optical interface 6.1.1 Protocol modes according to EN 13757-3 for heat meters 6.1.2 Protocol modes according to EN 62056-21 for heat meters 6.1.2.1 General 6.1.2.2 Restrictions for heat meters 6.1.2.3 Calculation of block check character 6.1.2.4 Syntax diagram 6.1.2.5 Data presentation for heat meter |
| 52 | 6.2 Application layer M-Bus and Local Bus 6.2.1 General 6.2.2 Coding of data records 7 Application 7.1 General 7.2 Physical layer 7.3 Link layer 7.4 Application layer 7.5 Control applications |
| 53 | Annex A (informative) Recommendation for heat meter test interface |
| 54 | Annex B (informative) Additional information for heat meters B.1 Additional information regarding the EN 62056-21 protocol B.2 Data set Figure B.1 — Signal direction |
| 55 | B.3 Coding of the data set identification number B.3.1 Schematic structure Figure B.2 — Schematic structure B.3.2 Values for “T” group code B.3.3 Values for “UU”, register codes |
| 56 | Table B.1 — Values for “UU”, register codes |
| 61 | B.3.4 Values for “W”, number of the tariff B.3.5 Use of “*/&” and “VV” for prestored values B.3.6 Coding of the unit in the data set Table B.2 — Coding of the unit in the data set |
| 62 | B.3.7 Coding of the value in the data set B.3.8 Coding of the measured value B.3.9 Coding of the error message B.3.10 Coding of the date and/or time stamp Figure B.3 — Coding of the date and/or time stamp |
| 63 | B.3.11 Presentation of related values |
| 64 | Annex C (informative) Automatic protocol detection and wake-up for the optical interface C.1 Introduction C.2 Trying EN 13757-2 protocol C.3 Trying the EN 62056-21 protocol |
| 66 | Annex D (informative) Usage of heat meters in control applications D.1 Heat meter D.1.1 General D.1.2 Application layer: data records D.1.3 Application: actuality of the data |
| 67 | D.1.4 Application layer: acceptable data types (DIFs) D.1.5 Application layer: acceptable units (VIFs) D.2 Controller D.2.1 Start until first answer |
| 68 | D.2.2 Start until first successful readout |
| 69 | Annex E (informative) Protection techniques for M-Bus meters against surge/lightning Figure E.1 — Without ground reference (100 x 6 kV x 50 μs) |
| 70 | Figure E.2 — With ground reference (100 x 6 kV x 50 µs) Figure E.3 — Without ground reference (100 x 10 kV x 50 µs, max. 250 Vrms) Figure E.4 — With ground reference (100 x 10 kV x 50 µs) |
| 71 | Figure E.5 — Without ground reference (100 x 2 kV x 50 µs) Figure E.6 — With ground reference (100 x 2 kV x 50 µs) Figure E.7 — Without ground reference (100 x 10 kV x 50 µs or 100 x 2 kV x 1 000 µs) |
| 72 | Figure E.8 — With ground reference (100 x 10 kV x 50 µs or 100 x 3 kV x 1 000 µs) Figure E.9 — Without ground reference (100 x 8 kV x 1 000 µs) Figure E.10 — With ground reference (100 x 6 kV x 1 000 µs) |
| 73 | Annex F (informative) Additional information about the master-unit for the M-Bus F.1 Master side interface to the M-Bus F.2 Master side interface for local data read out |
| 74 | Figure F.1 — Master side interface for local data read out F.3 Full size level converter |
| 75 | Figure F.2 — Full size level converter |
| 76 | Bibliography |
