Lon Communication Protocol; Application - ABB Relion REC670 Applications Manual

Section 18
Station communication
HwSyncSrc : set to Off
•
• AppSynch : set to NoSynch . This means that protection functions will not be blocked
SyncAccLevel : set to unspecified
•
Settings in PST in PCM600 under: Hardware/Analog modules/Merging units/MU01
SyncMode : set to NoSynch . This means that the IED do not care if the MU indicates loss of
•
time synchronization.
• TSYNCERR signal will not be set since there is no configured time synchronization source
• SYNCH signal on the MU_4I_4U function block indicates when protection functions are
blocked due to loss of internal time synchronization to the IED. Since
NoSynch this signal will not be set.
• MUSYNCH signal on the MU_4I_4U function block will be set if the datastream indicates
time synchronization is lost. However, protection functions will not be blocked.
To get higher availability in the protection functions, it is possible to avoid blocking if time
synchronization is lost when there is a single source of analog data. This means that if there is
only one physical MU and no TRM, parameter
HwSyncSrc can still be set to PPS . This will keep analog and binary data correlated in
disturbance recordings while not blocking the protection functions if PPS is lost.
18.4

LON communication protocol

18.4.1

Application

IED
IEC05000663 V2 EN-US
Figure 208: Example of LON communication structure for a substation automation
An optical network can be used within the substation automation system. This enables
communication with the IEDs through the LON bus from the operator's workplace, from the
control center and also from other IEDs via bay-to-bay horizontal communication.
The fiber optic LON bus is implemented using either glass core or plastic core fiber optic
cables.
420
Station HSI
MicroSCADA
Star coupler
RER 111
IED
system
AppSynch can be set to NoSynch but parameter
Control Center
Gateway
IED
IEC05000663-1-en.vsd
1MRK 511 358-UEN A
AppSynch is set to
IP14420-1 v1
IP14863-1 v1
M14804-3 v3
Application manual