Wednesday, August 12, 2009

Webservices for IEC 61850 or IEC 61850 LE (Lite Edition) are here

From time to time there is a discussion on the protocol stack for IEC 61850 - which is based on TCP/IP, upper OSI layers and MMS (ISO 9506). Some people today are looking for a lite edition that may use DNP3, IEC 60870-5-10x, or even Webservices.

Is there a need to define these protocol stacks during the years to come? NO!! The Standard IEC 61400-25-4 defines these stacks (published 12 months ago, 2008-08). No, I am not kidding. The Standard has been published by IEC TC 88 (Wind Turbines):

Wind turbines – IEC 61400-25-4: Communications for monitoring and control of wind power plants – Mapping to communication profile

Click HERE for the preview of the standard.

The stacks specified in this part of IEC 61400-25 comprise:

  • SOAP-based web services,
  • a mapping to OPC/XML-DA,
  • a mapping to MMS (IEC 61850-8-1),
  • a mapping to IEC 60870-5-104,
  • a mapping to DNP3.

All mappings are optional, but at least one optional mapping shall be selected in order to be compliant with this part of IEC 61400-25.

The stacks in IEC 61400-25-4 are covering all or parts of the abstract services in IEC 61400-25-3 (IEC 61850-7-2, ACSI) - excerpt of the list of mappings and services supported:


Example of a service for the Webservice stack (excerpt):


The mapping of services to DNP3 is depicted for one example (excerpt):


The mapping of Common Data Classes to DNP3 is depicted for one example (excerpt):


So: Why waiting for an IEC 61850 LE or for IEC 61850 Webservices - Here they are: IEC 61400-25-4.

If there is a need to revise or improve the stacks, visit the Tissue Data Base for IEC 61400-25.

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