IEC 60870-6-802:2002/AMD1:2005 PDF

Overview

IEC 60870-6-802:2002/AMD1:2005 is Amendment 1 to Part 6-802 of the IEC 60870 series. It supplements the original TASE.2 (Telecontrol Application Service Element) object models used for telecontrol protocols that are compatible with ISO and ITU‑T recommendations. The amendment adds a normative Annex B that expands the set of standardized object models for telecontrol/SCADA data exchange and defines how those objects map to MMS (Manufacturing Message Specification) types and ASN.1 encodings.

Key topics and technical requirements

• Supplemental object models (Annex B): Provides additional, control‑centre specific object models (e.g., IndicationPoint and ControlPoint logical combinations) to represent points, devices and associated metadata.
• IndicationPoint object model: Defines attributes such as PointName, PointType (REAL, STATE, DISCRETE, STATESUPPLEMENTAL), PointValue variants, QualityClass, Validity, CurrentSource, NormalSource, NormalValue, TimeStampClass, TimeStamp (1 s) and TimeStampExtended (1 ms), TimeStampQuality, COVClass and COVCounter.
• MMS type definitions (Clause B.3): Specifies MMS/ASN.1 types used to exchange object values - e.g., Data_Real, Data_State, Data_Discrete, Data_StateSupplemental, Data_Flags, Data_TimeStamp, and combined/extended structures such as Data_RealQTimeTagExtended and Data_StateExtended.
• Mapping rules (Clause B.4): Explains how object attributes map onto MMS named variables. Mapping is determined by attributes like PointType, QualityClass, TimeStampClass and COVClass. PointName maps to an MMS variable identifier.
• Protocol and standards alignment: Uses MMS grammar per ISO/IEC 9506‑2 and follows notation from IEC 60870‑6‑503 for object modelling semantics.

Applications and users

• Utility control centres and SCADA/telecontrol engineers implementing inter‑control‑centre or control centre ↔ SCADA master data exchange.
• System integrators and vendors developing TASE.2-compatible products that need standardized object models and MMS mappings for interoperability.
• Interoperability and communications architects who design cross‑vendor telecontrol solutions requiring consistent representation of point values, quality flags, timestamps and change‑of‑value counters.
• Developers implementing ASN.1/MMS encodings for power systems management and information exchange.

Related standards

• IEC 60870-6-802 (base publication) - TASE.2 object model part
• IEC 60870-6-503 - object modelling notation and TASE.2 services (referenced for modelling semantics)
• ISO/IEC 9506-2 - MMS protocol and ASN.1 data grammar

This amendment is essential reading for anyone implementing IEC 60870-6 (TASE.2) telecontrol solutions and seeking standardized object models, MMS type mappings and time/quality semantics for reliable SCADA data exchange.