DIN EN 61334-4-32 1997-09 PDF

Full title and description

DIN EN 61334-4-32:1997-09 — Distribution automation using distribution line carrier systems - Part 4: Data communication protocols; Section 32: Data link layer - Logical link control (LLC). This is the German (DIN) adoption of the IEC/EN document that specifies the logical link control services and interfaces used by distribution line carrier (PLC) based distribution automation and related telecontrol/telemetry applications.

Abstract

The standard defines the LLC sublayer service primitives, the LLC protocol data unit (LLC_PDU) formats (address, control and information fields), and the procedures needed to provide reliable data-link services between the application layer and the MAC sublayer for distribution line carrier systems. It covers unacknowledged and acknowledged transfer primitives, reply/update semantics, broadcast handling, timeouts/retransmission and error conditions relevant to low‑speed, high‑reliability PLC environments.

General information

• Status: National adoption (DIN version of EN/IEC); historically published as DIN EN 61334-4-32:1997-09. May be superseded by later EN editions in some national catalogues — see notes below.
• Publication date: 01 September 1997 (DIN national publication/adoption of EN/IEC material). The original IEC edition was published 26 September 1996.
• Publisher: Deutsches Institut für Normung (DIN) — German national adoption of the IEC/EN text.
• ICS / categories: 29.240.20 (Power transmission and distribution lines); 33.200 (Telecontrol / telemetering).
• Edition / version: DIN national adoption (first German edition corresponding to EN/IEC text). IEC original edition: Ed. 1.0 (1996).
• Number of pages: German DIN/EN pagination: 23 pages (German national PDF); original IEC bilingual edition: 69 pages.

Scope

This part (4-32) of the IEC/EN 61334 series specifies the logical link control (LLC) sublayer for the Data Communication Protocol (DCP) used in distribution automation over distribution line carrier systems. It defines the services that the LLC provides to LLC-users (application layer) and the interface between LLC and the medium access control (MAC) sublayer, including primitives for data transfer, replies, updates and broadcast. The scope is intended for PLC‑based distribution automation, telecontrol and automatic meter reading environments.

Key topics and requirements

• LLC service specification: DL_Data, DL_Reply, DL_Update_Reply primitives and their semantics.
• LLC-to-MAC interface: MA_Data primitives and interaction patterns for passing PDUs to the MAC sublayer.
• LLC_PDU structure: address fields (individual/group), control field formats and rules for invalid PDUs.
• Procedures and state machines: sender/receiver state tables, timeouts, retransmission, connection set‑up/close and test sequences.
• Broadcast and group addressing behaviour, and management/unsolicited service conventions.
• Conformance requirements for reliable low‑speed PLC links used in distribution automation and SCADA contexts.

Typical use and users

Engineers and architects designing distribution automation, PLC modem and coupling equipment vendors, utility automation / SCADA integrators, metering equipment manufacturers (when using PLC as transport), testing and certification bodies, and standards/technical committees working on electrical distribution communications. The standard is used to ensure interoperable LLC behaviour between devices implementing DCP over PLC.

Related standards

Part of the IEC/EN 61334 series (other relevant parts include 4-33, 4-41, 4-42, 4-511/4-512 and Part 6 encoding rules). The LLC specification is normally referenced alongside DLMS/COSEM application-layer work (IEC/EN 62056 series) when PLC is used for metering or AMR/AMI. The IEC original (1996) was harmonized as EN 61334-4-32:1996 and later editions/related EN adoptions exist (e.g., national EN/DIN catalogue entries and a 2002 EN publication in some markets).

Keywords

Distribution automation, distribution line carrier (DLC/PLC), Logical Link Control, LLC, DCP, MAC interface, DLMS/COSEM, telecontrol, SCADA, EN 61334, IEC 61334.

FAQ

Q: What is this standard?

A: DIN EN 61334-4-32:1997-09 is the German national adoption of the IEC/EN specification for the logical link control (LLC) sublayer used in distribution line carrier-based distribution automation systems; it defines LLC services, PDU structure and LLC-to-MAC interfaces.

Q: What does it cover?

A: It covers the LLC service primitives (DL_Data, DL_Reply, DL_Update_Reply, etc.), LLC_PDU formats (address and control fields), state machines and procedures for reliable data link operation, broadcast handling and the interface to the MAC sublayer for PLC systems.

Q: Who typically uses it?

A: Utility engineers, PLC/modem manufacturers, SCADA and metering system integrators, test laboratories and standards committees concerned with distribution automation and PLC communication interoperability.

Q: Is it current or superseded?

A: The original IEC edition was published 26 September 1996 and the DIN national adoption appeared in September 1997. Some parts of the IEC/EN 61334 family have later EN/IEC editions or related national publications (for example EN/DIN entries in the early 2000s). Users should check their national standards body catalogue for the latest status or more recent superseding editions before relying on the 1997 DIN text for new projects.

Q: Is it part of a series?

A: Yes — it is part of the IEC/EN 61334 series (Distribution automation using distribution line carrier systems). The series includes multiple parts covering physical layer, MAC, application protocols and encoding (e.g., parts 3, 4 (sections), 5, 6, etc.).

Q: What are the key keywords?

A: Logical Link Control (LLC), data link layer, distribution line carrier (PLC), distribution automation, DCP, MAC interface, DLMS/COSEM, telecontrol.