3.3 The IED section
SEMOD129775-4 v7
The IED section describes the complete IED as it is needed for
IEC 61850
communication and signal engineering. The data type template part of an IED may
be seen as part of the IED, even when separated in its own section. The IED's ICD
files include the description of the logical nodes, their data type templates and the
used or supported services. The structure of the IED section follows the definitions
made in the IEC 61850 standard.
T
wo basic IED types are used in system configuration.
• Station level IEDs
are located on the station level and are identified as client IEDs when they read
or write information from or to the bay IEDs. This functionality is represented
by logical nodes of group “Information (I)”. These are the logical nodes (LN)
= ITCI, IHMI and ITMI. Client IEDs are the receiver of information in
monitoring direction and sender of commands (control). These logical nodes
have no data objects. They are only used to link the report control blocks
(BRCBs) from the server IEDs. They have to read their information about the
signals and the signal configuration from the bay IEDs. This is possible by
checking all control blocks for a link to it as a client.
• Bay level IEDs
are located on the bay level and are identified as server IEDs when they read
or write information vertically. When GOOSE messages are received, the bay
level IED also has the client role.
Section 3 1MRK 511 393-UEN A
Substation Configuration description Language (SCL)
26 670 series 2.2 IEC
Communication protocol manual
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