Tuesday, April 28, 2015

Draft IEC 61850-8-2 SCSM – Mapping to XER and XMPP

Some 20 years after the first draft IEC 61850-8-2 SCSM (Mapping to Profibus FMS) we could expect the real IEC 61850-8-2 to be available by end of 2015.

The draft 8-2 provides an additional mapping of the messages of MMS by XER (XML Encoding Rule) and XMPP.

The MMS messages for IEC 61850-8-2 (above TCP/TLS/XMPP) are just differently encoded as in IEC 61850-8-1, as can be seen by the following example:


ASN.1 BER uses a binary encoding that produces less overhead compared to XER. But there will be many benefits provided by IEC 61850-8-2.

According to a presentation by Siemens during the Hanover Fair 2015, these are the main conclusions:

  1. It provides a secure and powerful communication for public networks considering end-to-middle and end-to-end security relations
  2. IEC 61850-8-2 is intended to use for power management and demand response of DER (distributed energy resources)
  3. In 2015 the IEC TC57 working group WG17 will finalize and publish this new specification

Click HERE for the full presentation [pdf, 3 MB]

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