ABB Relion 650 series ANSI, Manual

Page: 34 / 242

3.3 The IED section
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.
Two 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 511 281-UUS A
Substation Configuration description Language (SCL)
28 650 series ANSI
Communication protocol manual