ABB Relion SAM600 Communication Protocol Manual page 22

Section 3
Substation Configuration description Language (SCL)
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.
Subnetwork
Server
SB1.LD0
IEC17000104 V1 EN-US
Figure 4:
• A server represents the communication interface to the subnetwork (Ethernet).
• One or more logical device(s) (LD) are connected to a server.
• A set of logical nodes belong to a LD.
• The LN LLN0 is a special logical node per LD and contains for example the data sets, the
various control blocks, inputs (from GOOSE messages). In the IED series, the data sets and the
control blocks shall be located to LD0.
16
AP
Logical
Node
LLN0
LPHD
CTRL
LLN0
SXCBR1
SCSWI1
SXSW1
SCSWI2
SXSWI2
SCSWI3
SXSWI3
SCSWI4
SXSWI4
SCSWI5
SLGAPC
MON
LLN0
Organization of LDs, LNs, DOs and DAs in an IED
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Data
Mod
Beh
Health
Data
NamePlt
Attribute
Pos ctlVal
Loc stVal
OpCnt
BlkOpn
BlkCls
Origin
ctlModel
CBOpCap
Control
-
IEC17000104
1MRK 511 441-UEN Rev. C
IED
q
t
-en.vsd
1
Switchgear control unit SAM600-IO
Communication protocol manual