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-> home > news > Comparison of IEC 60870-5-101...

Comparison of IEC 60870-5-101/-103/-104
and IEC 60870-6-TASE.2 with IEC 61850

The most downloaded document !

UPDATED Version (2002-02-02)
Revised and updated comparison...
DNP3 added... now available

Need training for IEC 6087-5-101, -103, -104, DNP3, TASE.2, ...?

Is IEC 61850 competing with UCA 2.0? No! IEC 61850 is the solution - UCA is the brand name. Read the new two page comparison (2004-08-31; updated 2004-09-13)



Edited and drafted by Karlheinz Schwarz, SCC
schwarz@scc-online.de, www.scc-online.de

Version 1 (2001-08)

Download complete report version 1.


1 Objective

Users and vendors of standard compliant power system products ask more frequently why a new International Standard for real-time communication (IEC 61850) will be published soon by IEC TC 57.

The objective of this analysis is to provide a brief comparison of the available standards with the new standard IEC 61850 (see chapter 2 for full titles):

  • IEC 60870-5-101 Companion standard for basic telecontrol tasks
  • IEC 60870-5-103 Companion standard for the informative interface of protection equipment
  • IEC 60870-5-104 Network access for IEC 60870-5-101 using standard transport profiles
  • IEC 60870-6 Telecontrol equipment and systems - TASE.2
  • IEC 61850 Communication networks and systems in substations (UCA)

The comparison in chapter 3 shows what the solutions have in common and what the main benefits and advantages of each solution are. The analysis addresses seven areas of interest:

1. General (Table 1)
2. Process data description (Table 2)
3. Operational services (Table 3)
4. Selfdescription services (Table 4)
5. Online configuration (Table 5)
6. Offline configuration (Table 6)
7. Architecture and communication stacks (Table 7)

Chapter 4 provides a resume.

The analysis is based on the experience and background information of several experts (convenors and other working group members) that are involved in several IEC TC 57 projects and UCA for many years. These experts have reviewed this analysis.

The following list gives a brief interpretation of the comparison:

  • All solutions provide services to exchange the basic real-time information (e.g., single point status and control, cyclic and spontaneous reports, interrogation) for SCADA related requirements,
  • One provides the real-time information exchange for sampled values and trip commands (61850).
  • Most have fixed functionality (101, 103, 104, TASE.2), one supports broad applicability covering data modelling, self-description services, configuration service, and advanced communication models and services (61850),
  • Some are available in many products and applied all over (101, 103, TASE.2), products are available (104), or under development (61850),
  • Some use many main-road technologies (61850, TASE.2, 104 partly) or use proven (restricted) solutions (101, 103, 104 partly),
  • One will probably become the preferred IEC solution within the future seamless Telecontrol Communication Architecture (61850), the others will migrate to 61850 (TC 57 SPAG decision expected in spring 2002).

Download complete report version 1.



Is IEC 61850 competing with UCA 2.0? No! IEC 61850 is the solution - UCA is the brand name. Read the new two page comparison (2004-08-31; updated 2004-09-13)

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