SIST EN 13757-2:2018/kprA1:2023

Communication systems for meters - Part 2: Wired M-Bus communication

This draft European standard is applicable to the physical and link layer parameters of baseband communication over twisted pair (M Bus) for meter communication systems. It is especially applicable to thermal energy meters, heat cost allocators, water meters and gas meters.
NOTE    It is usable also for other meters (like electricity meters) and for sensors and actuators. For generic descriptions concerning communication systems for meters and remote reading of meters see EN 13757-1.

Kommunikationssysteme für Zähler - Teil 2: Drahtgebundene M-Bus-Kommunikation

Systèmes de communication pour compteurs - Partie 2 : Communication M-Bus filaire

Komunikacijski sistemi za števce - 2. del: Žične komunikacije po M-vodilu - Dopolnilo A1

General Information

• Status: Not Published
• Public Enquiry End Date: 04-Apr-2023
• ICS: 33.200 - Telecontrol. Telemetering
• ICS: 35.100.10 - Physical layer
• ICS: 35.240.99 - IT applications in other fields
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 02-Aug-2023
• Due Date: 20-Sep-2023
• Completion Date: 02-Aug-2023
• Mandate: M/441 - Standardisation mandate to CEN, CENELEC and ETSI in the field of measuring instruments for the development of an open architecture for utility meters involving communication protocols enabling interoperability
• Ref Project: EN 13757-2:2018/FprA1 - Communication systems for meters - Part 2: Wired M-Bus communication

Relations

• Merged Into: SIST EN 13757-2:2018+A1:2024 - Communication systems for meters - Part 2: Wired M-Bus communication
• Effective Date: 11-Oct-2023
• Amends: SIST EN 13757-2:2018 - Communication systems for meters - Part 2: Wired M-Bus communication
• Effective Date: 04-Aug-2021

Overview

SIST EN 13757-2:2018/kprA1:2023 is a draft amendment to the European standard focusing on wired M-Bus communication for meter communication systems. Developed by CEN/TC 294, this standard specifies the physical and link layer parameters for baseband communication over twisted pair wiring, often referred to as the M-Bus. It primarily targets metering devices such as thermal energy meters, heat cost allocators, water meters, and gas meters, but it also applies to other meters like electricity meters, as well as sensors and actuators.

This amendment enhances and clarifies the original EN 13757-2:2018 standard by introducing new terminology, refining communication protocols, and updating datagram handling procedures, with a focus on interoperability, reliability, and efficiency in meter reading systems.

Key Topics

• Physical and Link Layer Specifications
  The standard governs the low-level communication over twisted pair M-Bus wiring, establishing a robust foundation for meter data exchange.

• Communication Types and Datagram Structure
  Updates in this amendment clarify the communication types supported, including the removal of the "Status request" type and the addition of handling for unsupported communication types where such datagrams should be ignored.

• Frame Count Bit (FCB) and Frame Count Valid Bit (FCV)
  New definitions and clarifications specify these bits’ roles in managing datagram sequencing, retransmissions, and multi-datagram message administration to ensure data integrity and synchronization between master and slave devices.

• Collision and Error Handling
  Procedures for aborting datagram transmissions on collisions have been refined for both hardware and software implementations, improving fault tolerance.

• Link Layer Time Scheduling
  The amendment adds fault detection by specifying retry limits when responses from slave devices are not received within configured time frames.

• Multi-Adress and Broadcast Handling
  It details state management for devices with multiple primary addresses or using secondary addressing, including handling of broadcast and test addresses.

• Updated Figures and Technical Illustrations
  Figures 1 through 7 have been modified to better represent the updated communication protocol structures and timing diagrams.

Applications

SIST EN 13757-2:2018/kprA1:2023 is essential for manufacturers, developers, and system integrators involved in:

• Utility Metering Systems
  Wired M-Bus communication is widely adopted in systems managing thermal energy, gas, water, and heat cost allocation meters, enabling efficient, reliable data transmission over existing wired infrastructures.

• Smart Meter Networks
  This standard supports smart metering by ensuring consistent communication protocols for remote reading, diagnostics, and control.

• Sensor and Actuator Networks
  Beyond meters, the standard’s applicability to sensors and actuators facilitates broader automation and control scenarios within industrial and residential building management systems.

• Telecontrol and Telemetry
  The specifications align with remote control and telemetry standards, enabling integration with wider telemetry networks for improved data management.

Related Standards

SIST EN 13757-2:2018/kprA1:2023 is part of the EN 13757 series addressing communication systems for meters. Key related parts include:

• EN 13757-1: Data exchange definitions - outlining generic communication system concepts and remote reading protocols.
• EN 13757-3: Application protocols - detailing the higher-layer protocols for meter communication.
• EN 13757-4: Wireless M-Bus communication - specifying wireless alternatives to the wired M-Bus.
• EN 13757-5 to EN 13757-8: Covering relaying, local bus, transport and security services, and adaptation layers.

Additionally, references to EN 60870-5-2 suggest interchangeability and compatibility considerations for frame types and function codes.

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Keywords: EN 13757-2, wired M-Bus communication, meter communication systems, thermal energy meters, heat cost allocators, water meters, gas meters, physical layer, link layer, datagram sequencing, frame count bit, communication protocol, CEN standard, metering telemetry, smart metering, remote reading

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 13757-2:2018/oprA1:2023
01-marec-2023
Komunikacijski sistemi za števce - 2. del: Žične komunikacije po M-vodilu -
Dopolnilo A1
Communication systems for meters - Part 2: Wired M-Bus communication
Kommunikationssysteme für Zähler - Teil 2: Drahtgebundene M-Bus-Kommunikation
Systèmes de communication pour compteurs - Partie 2 : Communication M-Bus filaire
Ta slovenski standard je istoveten z: EN 13757-2:2018/prA1
ICS:
33.200 Daljinsko krmiljenje, daljinske Telecontrol. Telemetering
meritve (telemetrija)
35.100.10 Fizični sloj Physical layer
SIST EN 13757-2:2018/oprA1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 13757-2:2018/oprA1:2023

SIST EN 13757-2:2018/oprA1:2023

DRAFT
EUROPEAN STANDARD
EN 13757-2:2018
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
January 2023
ICS 33.200; 35.100.10; 35.240.99; 91.140.50
English Version
Communication systems for meters - Part 2: Wired M-Bus
communication
Systèmes de communication pour compteurs - Partie 2 Kommunikationssysteme für Zähler - Teil 2:
: Communication M-Bus filaire Drahtgebundene M-Bus-Kommunikation
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 294.

This draft amendment A1, if approved, will modify the European Standard EN 13757-2:2018. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13757-2:2018/prA1:2023 E
worldwide for CEN national Members.

SIST EN 13757-2:2018/oprA1:2023
EN 13757-2:2018/prA1:2023 (E)
Contents Page
European foreword . 3
1 Modification to Clause 3, “Terms and definitions” . 4
2 Modification to 5.6, “Datagram abort on collision” . 4
3 Modification to 5.7.3, “Datagram structure” . 4
4 Modification to 5.7.3.1, “Normalization” . 5
5 Deletion of 5.7.3.4, “Status request” . 5
6 Addition of 5.7.3.5, “Unsupported communication types”. 5
7 Modification to 5.7.6, “Link layer time schedule” . 5
8 Modification to 5.7.7, “Datagram sequencing” . 5
9 Modification to Figures 1 to 7 . 6

SIST EN 13757-2:2018/oprA1:2023
EN 13757-2:2018/prA1:2023 (E)
European foreword
This document (prEN 13757-2:2018/prA1:2023) has been prepared by Technical Committee
CEN/TC 294 “Communication systems for meters”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will amend EN 13757-2:2018.
During the review of the standard four areas of improvement were identified which are addressed in this
amendment.
In comparison with EN 13757-2:2018, the following technical modifications have been made:
a) addition of abbreviations,
b) clarification 5.7.3.1 “Normalization” regarding the FBC modification,
c) deletion of 5.7.3.4 “Status request”,
d) new 5.7.3.5 “Unsupported communication types” for handling of unsupported communication types,
e) handling of exceeded time limit in 5.7.6 “Link layer time schedule”
f) clarification of 5.7.7. “Datagram sequencing”,
g) modification of Figures 1 to 7.
EN 13757, Communication systems for meters, is currently composed of the following parts:
— Part 1: Data exchange
— Part 2: Wired M-Bus communication
— Part 3: Application protocols
— Part 4: Wireless M-Bus communication
— Part 5: Wireless M-Bus relaying
— Part 6: Local Bus
— Part 7: Transport and security services
— Part 8: Adaptation layer
SIST EN 13757-2:2018/oprA1:2023
EN 13757-2:2018/prA1:2023 (E)
1 Modification to Clause 3, “Terms and definitions”
Rename the clause from “Terms and definitions” to “Terms, definitions and abbreviations”.
Add a subclause “3.1 Terms and definitions”, renumber the term 3.1 to 3.1.2, and add the following new
term entry:
“
3.1.1
communication type
frame type as defined in EN 60870-5-2:1993 and identified by the function code
Note 1 to entry: Other parts of EN 13757 also use the term message type as an equivalent.
“.
Add another subclause “3.2 Abbreviations” after the new 3.1.2. In the new subclause “3.2 Abbreviations”
add the following:
“Abbreviation Term
FCB frame count bit
FCV frame count valid bit”.
2 Modification to 5.6, “Datagram abort on collision”
Replace
“If a slave detects at the end of a mark level send bit a (voltage) space signal from its master it shall
terminate its send datagram as soon as possible. A received continuous space signal from the master
for > 11 bit times (break signal) shall stop the datagram send of a slave not later than 24 bit times after
the start of such a break signal. For a software implementation of the byte transmission this requirement
can be met by testing the received signal state either at the end of each mark state send bit or before the
beginning of each st
...