ABB RER670 Applications Manual page 443

1MRK 506 375-UEN A
Railway application RER670 2.2 IEC
Application manual
• SYNCH signal on the MUx function block indicates that protection functions
are blocked due to loss of internal time synchronization to the IED (that is loss
of the hardware synchSrc).
• MUSYNCH signal on the MUx function block monitors the synchronization
flag smpSynch in the datastream and IED hardware time synchronization.
No time synchronization
This example is not valid when GPS time is used for differential
protection, when PTP is enabled or when the PMU report is used.
IED
IEC/UCA 61850-9-2LE
Data
MU
IEC10000075=2=en=Original.vsd
IEC10000075 V2 EN-US
Figure 184: Setting example without time synchronization
It is also possible to use IEC/UCA 61850-9-2LE communication without time
synchronization.
Settings on the local HMI under Main menu/Configuration/Time/
Synchronization/TIMESYNCHGEN:1/IEC61850-9-2:
• HwSyncSrc: set to Off
• SyncLostMode: set to No block to indicate that protection functions are not
blocked
• SyncAccLevel: set to unspecified
Two status monitoring signals with no time synchronization:
Section 18
Station communication
437