ABB Relion 670 Series Applications Manual page 470

Section 18
Station communication
• TSYNCERR signal on the TIMEERR function block will go high whenever internal
goes above the setting
after maximum 4 seconds after an interruption in the PPS fiber communication from the MU.
• SYNCH signal on the MU_4I_4U function block indicate that protection functions are blocked
by loss of internal time synchronization to the IED (that is loss of the
• MUSYNCH signal on the MU_4I_4U function block monitors the synchronization flag from the
MU (in the datastream). When the MU indicates loss of time synchronization, this signal is set.
A "blockedByTimeSynch" signal could be made by connecting the MUSYNCH and the SYNCH
through an OR gate. If also the SMPLLOST signal is connected to the same OR gate, it will be more
of a "BlockedByProblemsWith9-2" signal.
No synchronization
IEC 61850-9-2LE
IEC10000075 V1 EN-US
Figure 220: Setting example without time synchronization
It is possible to use IEC 61850-9-2LE communication without time synchronization. Settings in this
case under Settings/Time/Synchronization/TIMESYNCHGEN/IEC 61850-9-2 are:
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.
464
SyncAccLevel ( 4us in this case). This will block the protection functions
IED
Data
MU
IEC10000075-1-en.vsd
1MRK 511 358-UUS A
timeQuality
HW-synchSrc ).
AppSynch is set to
Application manual