BS EN 62056-42-2002 PDF

Full title and description

STB BS EN 62056-42:2002 — Electricity metering. Data exchange for meter reading, tariff and load control — Part 42: Physical layer services and procedures for connection‑oriented asynchronous data exchange. This document specifies the physical‑layer services and procedures used in the COSEM (Companion Specification for Energy Metering) three‑layer connection‑oriented profile for asynchronous communication; annexes show PSTN/modem usage and explain the role of data models and protocols in meter data exchange.

Abstract

Specifies the physical layer services and protocols within the COSEM connection‑oriented profile for asynchronous data exchange between meters and data collection equipment. Includes practical examples (Annex A) such as PSTN/Hayes‑style modem use and an explanatory annex on the relationship between data models and communication protocols (Annex B). Intended as the physical‑layer part of the IEC/EN 62056 (DLMS/COSEM) suite.

General information

• Status: Published/adopted as an EN/BS EN national adoption (document maintained; see national standards bodies for current national status and any amendments).
• Publication date: IEC base publication 18 February 2002; BS EN adoption published 16 July 2002 (BS EN 62056-42:2002).
• Publisher: Original international text published by the International Electrotechnical Commission (IEC); the BS EN edition is published/distributed by BSI as the national adoption.
• ICS / categories: 35.100.10 (Physical layer); 91.140.50 (Electricity supply systems).
• Edition / version: Edition 1.0 (IEC 62056-42:2002) — adopted as BS EN 62056-42:2002.
• Number of pages: IEC bilingual base text: 62 pages; national BS EN release typically published as ~30 pages (format/pagination vary by publisher/adoption).

Scope

This part of the 62056 series defines the physical‑layer services and procedures required to support connection‑oriented asynchronous data exchange for electricity metering applications under the COSEM companion specification. It covers service primitives, signalling and timing for establishing and releasing links, medium‑specific notes (including PSTN/modem examples), and guidance on how the physical layer interacts with higher protocol layers in the DLMS/COSEM suite.

Key topics and requirements

• Definition of physical‑layer service primitives and procedures for connection‑oriented asynchronous communication (COSEM connection‑oriented profile).
• Link establishment, data transfer and release procedures, timing, and error/flow considerations for asynchronous links.
• Guidance and example for use over the Public Switched Telephone Network (PSTN) using Hayes‑style intelligent modems (Annex A).
• Explanation of the relationship between the physical layer, data models and protocols in meter data exchange (Annex B).
• Interoperability context: intended to be used together with other parts of the IEC/EN 62056 (DLMS/COSEM) family (e.g., application and data link parts).

Typical use and users

Used by electric utility communications engineers, electricity meter manufacturers, protocol and firmware developers, system integrators, testing and certification laboratories, and telecommunications suppliers implementing metering access over asynchronous links (including dial‑up/PSTN or serial asynchronous links). Typical uses include meter readout interfaces, tariff/load control communications and interoperability testing within the DLMS/COSEM framework.

Related standards

Part of the IEC/EN 62056 (DLMS/COSEM) family. Relevant related parts include — but are not limited to — IEC/EN 62056‑21 (direct local data exchange), IEC/EN 62056‑6‑1 and 6‑2 (OBIS and COSEM interface classes), IEC/EN 62056‑46 (data link layer using HDLC), and other connectivity/application parts in the 62056 series. National adoptions and amendments may also reference companion documents and amendments.

Keywords

COSEM, DLMS, physical layer, asynchronous, connection‑oriented, electricity metering, meter reading, tariff control, PSTN modem, IEC 62056, BS EN 62056‑42.

FAQ

Q: What is this standard?

A: It is Part 42 of the IEC/EN 62056 suite specifying physical‑layer services and procedures for connection‑oriented asynchronous data exchange used in electricity metering (COSEM profile).

Q: What does it cover?

A: The document covers physical‑layer primitives, link setup/release and timing, error and flow considerations, and includes examples for PSTN/modem use (Annex A) and a descriptive annex on data models and protocols (Annex B).

Q: Who typically uses it?

A: Utilities, meter manufacturers, firmware and protocol developers, system integrators, test laboratories and telecommunications providers working on metering communications and DLMS/COSEM interoperability.

Q: Is it current or superseded?

A: IEC 62056‑42 was published in 2002 and adopted as BS EN 62056‑42:2002; check national standards bodies (BSI or other national adopters) for any national amendments or later superseding documents. The IEC webstore shows the original 2002 edition and provides the current publication metadata.

Q: Is it part of a series?

A: Yes — it is one part of the IEC/EN 62056 family (the DLMS/COSEM suite) covering different layers and aspects of meter data exchange (e.g., parts for direct local exchange, data link, object identification, interface classes and application layer).

Q: What are the key keywords?

A: COSEM, DLMS, physical layer, asynchronous connection, meter reading, tariff control, PSTN modem, IEC 62056, BS EN.