IEC 62056-3-1:2013

Overview

IEC 62056-3-1:2013 is an international standard published by the International Electrotechnical Commission (IEC) that specifies protocols for electricity metering data exchange using the DLMS/COSEM suite. This part (3-1) focuses specifically on the use of local area networks over twisted pair cables with carrier signalling, commonly known as the Euridis Bus.

This standard defines three profiles for local bus data exchange supporting stations that may or may not be energized by the bus itself. The profiles-base profile, profile with DLMS, and profile with DLMS/COSEM-share a unified physical layer, ensuring full compatibility across devices. Key improvements in this 2013 edition include support for the DLMS/COSEM Application layer and object model, enhanced Data Link layer separation, and communication speed negotiation up to 9600 baud.

Key Topics

• Local Bus Data Exchange Profiles
  IEC 62056-3-1:2013 covers three profiles for communication on local buses that operate on twisted pair cables:

  • Base profile without DLMS
  • Profile with DLMS protocol
  • Profile with DLMS/COSEM, aligned with IEC 62056 standards

• Physical Layer and Transmission Medium
  Communication uses twisted pair wiring coupled with a 50 kHz carrier signalling method. This physical setup supports both energized and non-energized stations, with energy supplied on the bus for non-energized devices.

• Data Link Layer Optimization
  The Data Link layer is split into two functional parts: a pure Data Link layer and a Support Manager entity responsible for media communication management, including bus initialization, discovery, and speed negotiation.

• Communication Speed Negotiation
  Devices can negotiate baud rates dynamically, allowing communication speeds up to 9600 baud, improving data transfer efficiency over the local bus.

• Application Layer Integration
  The profiles support the DLMS/COSEM Application layer and COSEM object model for standardized, interoperable metering data representation and exchange.

• Error Handling and System Management
  The standard includes detailed mechanisms for error detection, handling, and recovery across all layers to ensure robust communication.

Applications

IEC 62056-3-1:2013 is critical for utilities and metering system manufacturers involved in smart metering infrastructure, specifically:

• Smart Metering Networks
  Enables reliable data exchange between electricity meters and data concentrators or other primary stations in local area networks using existing twisted pair infrastructure.

• Energy Supply to Non-Energized Devices
  The specification allows the bus itself to power non-energized metering devices, reducing wiring complexity and installation costs.

• Interoperable Metering Systems
  By supporting DLMS/COSEM protocols, it facilitates the integration of devices from multiple manufacturers, enhancing system flexibility and future-proofing.

• Remote Meter Reading and Control
  Supports remote reading, programming, and transfer operations essential for automated meter data acquisition and management in advanced metering infrastructure (AMI).

• Legacy and New Installations
  Given its compatibility between base and DLMS-based profiles, the standard assists in transitioning older systems to modern metering solutions without full infrastructure overhaul.

Related Standards

• IEC 62056 Series
  The parent DLMS/COSEM suite of standards for electricity metering data exchange provides a comprehensive framework across different communication media and layers.

• IEC 62056-3-3
  Defines the use of local area networks with power line carrier (PLC) signalling complementing the twisted pair approach.

• IEC 62056-7-3
  Covers object identification and modeling which dovetails with COSEM profiles detailed in this standard.

• IEC 62056-8-3
  Addresses persistent data exchange mechanisms, which may be layered on top of the physical and data link protocols in IEC 62056-3-1.

Conclusion

IEC 62056-3-1:2013 plays a vital role in standardizing metering data communication over twisted pair local area networks using carrier signalling. Its backward compatibility and support for the DLMS/COSEM protocol suite enable utilities and device manufacturers to ensure interoperable, reliable, and efficient smart metering communications. By implementing this standard, organizations can optimize network performance, enhance remote meter management, and streamline deployment of intelligent electricity metering systems worldwide.

Keywords: IEC 62056-3-1, DLMS/COSEM, electricity metering data exchange, twisted pair communication, Euridis Bus, local area networks, carrier signalling, smart metering protocols, data link layer, communication speed negotiation