ProSoft Technology PLX8X-MNET-61850 - Manual (Page 171)

PLX8x-MNET-61850 ♦ Communication Gateway Reference
Modbus TCP/IP to IEC 61850 User Manual
ProSoft Technology, Inc. Page 171 of 228
May 14, 2014
6.6.2 IEC 61850 Benefits
 Object-oriented data model
 Introduces Logical Nodes (LNs) for formally defining functions (for example
XCBR = Circuit Breaker, XSWI = Isolator or earth switch)
 LN defines standardized access to its data
 Performance guidelines per LN strongly influence the communication system
structure
 Communication technology based upon standardized rules, not rules stated
by chance by customer specifications
 Strong formal description of automation system, which is key for specification,
design, and engineering
 Self-describing (Example: vendor name plate information)
6.6.3 IEC 61850 Communication Features
 Specific Communication Service Mapping (SCSM) is done via MMS (ISO/IEC
9506-1 and ISO/IEC 9506-2) and to ISO/IEC 8802-3. This is part IEC-61850-
8-1 of the standard.
 Specific Communication Service Mapping (SCSM) for Sampled Values is
over ISO/IEC 8802-3. This is part IEC-61850-9-2 of the standard.
Ethernet has proven performance for the demands of IEC 61850. For best
performance, it is recommended that Ethernet switches be used, rather than
hubs.
6.6.4 SCL / Standardized Data Exchange
IEC- 61850’s SCL (Substation Configuration Description Language) introduces a
powerful feature for substation automation. It provides a vendor-independent
representation of the substation’s configuration. For example, XCBR is a circuit
breaker, no matter who the vendor is, what the country the vendor is from, what
country the system integrator is from, where the installation is.
IEC-61850 has a number of SCL-type files:
 SSD for substation specification description
 SCD for the substation configuration description
 ICD for IED capability description (like a configuration template for the IED)
 CID for the configured IED description
Note: This concept is key for meeting engineering challenges.