IEC TR 60870-6-504-1998 PDF

Full title and description

Telecontrol equipment and systems - Part 6-504: Telecontrol protocols compatible with ISO standards and ITU-T recommendations - TASE.1 User conventions. Defines user conventions and usage rules for the TASE.1 application interface (TAPI), including parameter usage and sequencing of service primitives.

Abstract

This Technical Specification provides detailed user conventions for the TASE.1 telecontrol protocol family (Part 6-504). It specifies how the TASE.1 Application Programming Interface (TAPI) is to be used by implementers — covering parameter semantics, service-primitive sequencing, result codes and proforma user elements to ensure interoperable implementations for telecontrol/SCADA systems.

General information

• Status: Published (IEC Technical Specification / Technical Report entry for 60870-6-504:1998).
• Publication date: 21 December 1998 (1998-12-21).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 33.200 (Telemechanics / telecontrol).
• Edition / version: Edition 1.0 (1998).
• Number of pages: 339 pages.

Scope

Specifies user conventions for TASE.1 (Telecontrol Application Service Element) implementations to ensure compatibility with ISO and ITU‑T based communications (OSI model). The scope covers the TASE.1 API (TAPI) usage rules, parameter definitions, expected sequencing of service primitives, standardized result codes and proforma user elements (UECS, UEXIT) used to exchange telecontrol information between systems. It is intended to enable interoperable telecontrol/SCADA implementations across vendors.

Key topics and requirements

• Definition of TASE.1 user elements and proforma structures (UECS, UEXIT) required for implementation.
• Rules for use of the TASE.1 Application Programming Interface (TAPI): parameter usage and service-primitive sequencing.
• Specification of result code values and their interpretation (normative annexes).
• Conformance guidance to promote interoperability between telecontrol equipment and systems using ISO/ITU‑T compatible stacks.
• Normative and informative annexes providing proforma documents, bibliographies and implementation aids.

Typical use and users

Primary users are power-utility automation engineers, SCADA product vendors, system integrators and communication protocol implementers working on telecontrol links between control centers and substations or between control systems. The document is used during protocol implementation, testing, conformance checking and when writing vendor or procurement specifications for TASE.1-enabled equipment.

Related standards

Part of the IEC 60870 family (telecontrol / SCADA standards). Closely related documents include other parts of IEC 60870‑6 (protocol definitions and mappings) and companion technical reports/specifications addressing telecontrol application profiles and mappings to ISO/ITU‑T recommendations. Implementers often refer to the broader IEC 60870 series and to ITU‑T/ISO standards that define the underlying communication layers.

Keywords

TASE.1; TAPI; telecontrol; telecontrol protocols; SCADA; IEC 60870-6; user conventions; service primitives; UECS; UEXIT; interoperability.

FAQ

Q: What is this standard?

A: IEC 60870-6-504:1998 is a Technical Specification that defines user conventions for the TASE.1 telecontrol protocol family, specifying how the TASE.1 API (TAPI) should be used for interoperable telecontrol implementations.

Q: What does it cover?

A: It covers parameter semantics, service-primitive sequencing, standardized result codes, and proforma user elements (e.g., UECS, UEXIT) to guide implementers of TASE.1-based telecontrol systems.

Q: Who typically uses it?

A: Vendors of telecontrol/SCADA equipment, utility automation engineers, protocol implementers and system integrators use it when implementing, testing or specifying TASE.1-capable systems.

Q: Is it current or superseded?

A: The document was published on 21 December 1998 as edition 1.0. It remains the published Technical Specification for Part 6-504; users should check national adoption or later IEC publications for any superseding parts or amendments relevant to specific implementations. (IEC catalog entry shows the original publication details and stability information.)

Q: Is it part of a series?

A: Yes — it is part of the IEC 60870 series (telecontrol equipment and systems) and specifically the Part 6 family covering telecontrol protocols compatible with ISO/ITU‑T recommendations. Implementers normally use it together with other IEC 60870-6 parts and related communications standards.

Q: What are the key keywords?

A: TASE.1, TAPI, telecontrol, SCADA, interoperability, IEC 60870-6, user conventions, service primitives, UECS, UEXIT.