Toshiba GR-200 Series Instruction Manual page 772

About protocol
11.3.1
The IED dynamically generates Logical Nodes, Data sets and control blocks defined in CID file
upon boot-up. We shall discuss the configuration procedure to set the data in CID files later.
For the IEC 61850 communication, the IED consists of multiple logical devices and logical
nodes. The user should configure the 61850 Data Model to perform a required function for the
protection and control.
Modular approach achieves data transfer between devices in the IEC 61850 standard. All
function in the IEC 61850 network are grouped into smaller objects called Logical Nodes (LNs),
which contains process objects related data and attributes of a logical device protection and
control function. Logical Node Zero (LLN0) represents specific information of the logical device.
Logical Node Physical Device (LPHD) represents specific information of a physical device. A
generic device is called Physical device (PD). The LPHD contains the properties of the PD. A
specific function in the IED is represented as domain specific LN. The domain specific LN
contains the essential function for target devices in the IEC 61850 network.
LN data model defines the abstract syntax and semantics of the information exchanged
between PDs. The relation between data object classes, data types, data attributes and
abstract data objects are provided in the LN data model. The LN data model is mapped to
Manufacturing Message Specification (MMS) and Generic Object Oriented Substation Event
(GOOSE) functions. Table 11.3-1shows the description of LNs.
LN
Logical node zero represents logical device specific
LLNO
information
Logical node physical device represents physical
LPHD
device specific information
Domain Domain specific LN represents protection relay
specific LN specific function
Generic input output logical node is used if essential
GGIO
signals are not defined in the extended logical nodes.
All LN classes (LLN0 and domain specific LN) receive the mandatory data of the common LN
except LPHD. Table 11.3-2 exemplifies Function, Logical node and Communication service
used in the IEC 61850 communication.
Table 11.3-1 LN descripion
Description
- 753 -
6F2T0200 (0.15)
Actual device
corresponding to LN
Operation state of IED
State of 43 switch
IED (GRE200), etc.
XCBR,CSWI
Based on client
requirements
GRE200 (1,2)