Industry Protocols
15.1
IEC 61850/MMS
235
UM Config GRS
Release
8.0
09/2019
15.1
IEC 61850/MMS
IEC 61850/MMS is an industrial communication protocol standardized by the International
Electrotechnical Commission (IEC). The protocol is to be found in substation automation, for
example in the control technology of energy suppliers.
This protocol, which works in a packet-oriented way, is based on the TCP/IP transport protocol and
uses the Manufacturing Messaging Specification (MMS) for the client-server communication. The
protocol is object-oriented and defines a standardized configuration language that comprises,
among other things, functions for SCADA, Intelligent Electronic Devices (IED) and for the network
control technology.
Part 6 of the IEC 61850 standard defines the configuration language SCL (Substation
Configuration Language). SCL describes the properties of the device and the system structure in
an automatically processable form. The properties of the device described with SCL are stored in
the ICD file in the device.
15.1.1
Switch model for IEC 61850
The Technical Report, IEC 61850 90-4, specifies a bridge model. The bridge model represents the
functions of a switch as objects of an Intelligent Electronic Device (IED). An MMS client (for
example the control room software) uses these objects to monitor and configure the device.
Figure 53: Bridge model based on Technical Report IEC 61850 90-4
Table 38: Classes of the bridge model based on TR IEC61850 90-4
Class
Description
LN LLN0
Zero
logical node of the
Bridge
IED:
Defines the logical properties of the device.
LN LPHD
Physical Device
logical node of the
Bridge
IED:
Defines the physical properties of the device.
LN LBRI
Bridge
logical node:
Represents general settings of the bridge functions of the device.
LN LCCH
Communication Channel
logical node:
Defines the logical
Communication Channel
that consists of one or more physical
device ports.
4
3
2
1
LN LPCP
LN LPCP
LN LPCP
LN LPCP
LN LPLD
LN LPLD
LN LPLD
LN LPLD
LN LBSP
LN LBSP
LN LBSP
LN LBSP
LN LCCF
LN LCCF
LN LCCF
LN LCCH
LN LCCH
LN LCCH
LN LBRI
LN LPN0
LN LPHD
A
B
Port Number
Logical Device
Physical Device
paired redundant ports
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