IEC 62056-42-2002 PDF
Name in English:
St IEC 62056-42-2002
Name in Russian:
Ст IEC 62056-42-2002
Original standard IEC 62056-42-2002 in PDF full version. Additional info + preview on request
Full title and description
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 part of IEC 62056 (COSEM/DLMS family) specifies the physical-layer services, procedures and example usage (including an annex illustrating PSTN modem use) for connection‑oriented asynchronous communication between meters and concentrators/head‑ends.
Abstract
IEC 62056-42:2002 defines the bit‑transmission and service primitives used by the COSEM three‑layer connection‑oriented profile for asynchronous data exchange. It lists connection establishment and release services, data communication and layer‑management services, and gives examples (annexes) showing practical use cases such as PSTN modem links and an explanation of the role of COSEM data models. The standard supports interoperability at the physical layer for meter‑to‑headend links.
General information
- Status: Current / active (IEC publication, adopted as EN/EN–national variations in many countries).
- Publication date: 18 February 2002 (IEC base publication, edition 1.0).
- Publisher: International Electrotechnical Commission (IEC).
- ICS / categories: 35.100.10; 91.140.50.
- Edition / version: Edition 1.0 (2002).
- Number of pages: 62 (IEC webstore listing for the base publication).
Bibliographic and status details follow the IEC base publication record and common EN/adoption entries.
Scope
This part of IEC 62056 specifies the physical‑layer services and protocols to be used within the COSEM companion specification’s three‑layer connection‑oriented profile for asynchronous communications. It covers the service definitions for connection establishment and release, data transfer primitives, layer management services and illustrative examples of use over common media (for example PSTN modem links). It does not define higher‑layer COSEM object models (those are covered in other parts of the IEC 62056 series).
Key topics and requirements
- Service specification for the physical layer: connection establishment, confirmation and release primitives.
- Data communication services and procedures for connection‑oriented asynchronous exchange.
- Layer management services (link control, state handling and error/exception conditions).
- Bit‑level and timing constraints required for interoperable physical‑layer implementations.
- Practical usage examples (annexes) — e.g., using PSTN/ Hayes‑style modems to carry COSEM sessions, and explanatory material on how the physical layer interacts with COSEM data models.
- Conformance expectations for meter interfaces, modems and head‑end equipment to achieve inter‑vendor interoperability at the physical layer.
These topics enable implementers to design modem/serial/PSTN interfaces and test procedures that interoperate within the DLMS/COSEM stack.
Typical use and users
Primary users are electricity meter manufacturers implementing COSEM physical‑layer services; utility communications engineers and program managers designing remote meter‑reading, tariff switching and load‑control networks; modem and communications equipment vendors; system integrators; and test laboratories performing conformance/interoperability testing. Typical deployment scenarios include serial/RS‑232 or RS‑485 links, modem dial‑up (PSTN) meter reading, and other asynchronous connection‑oriented media that carry DLMS/COSEM application traffic.
Related standards
IEC 62056-42 is part of the IEC 62056 (DLMS/COSEM) family. Closely related parts include (but are not limited to) IEC/EN 62056-21 (direct local data exchange), IEC/EN 62056-46 (data link layer, HDLC), IEC/EN 62056-53 (COSEM application layer), IEC/EN 62056-61 (OBIS object identification) and IEC/EN 62056-62 (interface classes). Implementers commonly reference these companion parts together to achieve full DLMS/COSEM interoperability.
Keywords
IEC 62056, COSEM, DLMS, physical layer, bit transmission, connection‑oriented asynchronous, meter reading, PSTN modem, layer services, meter communications, tariff switching, load control.
FAQ
Q: What is this standard?
A: IEC 62056-42:2002 is the IEC part that defines physical‑layer services and procedures for connection‑oriented asynchronous data exchange used within the DLMS/COSEM meter‑data communications framework.
Q: What does it cover?
A: It covers service definitions for connection establishment and release, data transfer primitives, layer management, bit‑level/timing requirements and example uses (annexes) such as PSTN modem operation. It does not define application‑level COSEM object models.
Q: Who typically uses it?
A: Meter manufacturers, utility communications engineers, modem and system vendors, integrators and test laboratories involved in implementing or validating DLMS/COSEM physical‑layer interoperability.
Q: Is it current or superseded?
A: The IEC base publication is Edition 1.0 published in 2002 and is the recognized reference for this part; national and regional adoptions (EN/EN‑national) exist. The IEC webstore records the 2002 publication and stability information for the document; users should check national catalogues or IEC for any later amendments or replacements relevant to their jurisdiction before use.
Q: Is it part of a series?
A: Yes — it is one part of the IEC 62056 series (the DLMS/COSEM suite). Other parts address the data link layer, application layer, object model (COSEM/OBIS) and interface classes that together define the full meter‑data exchange stack.
Q: What are the key keywords?
A: COSEM, DLMS, physical layer, connection‑oriented asynchronous, meter reading, PSTN modem, bit transmission, data exchange, tariff and load control.