ABB IEC 61850 Edition 2 Communication Protocol Manual page 33

1MRK 511 393-UEN A
670 series 2.2 IEC
Communication protocol manual
Substation Configuration description Language (SCL)
Subnetwork
AP
Server
SB1.LD0
Logical
Node
LLN0
LPHD
CTRL
MON
PROT
IEC16000078 V1 EN-US
Figure 4: Organization of LDs, LNs, DOs and DAs in an IED
• 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.
Data
LLN0
SXCBR1 Mod
SCSWI1
Beh
SXSW1
Health
SCSWI2
NamePlt
SXSWI2
Pos
SCSWI3
Loc
SXSWI3
OpCnt
SCSWI4 BlkOpn
SXSWI4
BlkCls
SCSWI5 CBOpCap
SLGAPC
LLN0
CVMMXN1
LLN0
CCPDSC
Control
Section 3
IED
Data
Attribute
ctlVal
stVal
q
t
Origin
ctlModel
IEC16000078-1-en.vsd
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