ABB RES670 Applications Manual page 312

Section 19
Station communication
306
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 108: 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:
• SYNCH signal on the MUx function block indicates that protection functions
are blocked due to loss of internal time synchronization to the IED. Since
SyncLostMode is set to No block, this signal is not set.
• MUSYNCH signal on the MUx function block is set if the datastream
indicates time synchronization loss. However, protection functions are not
blocked.
To get higher availability in protection functions, it is possible to avoid blocking
during time synchronization loss if there is a single source of analog data. This
means that if there is only one physical MU and no TRM, parameter SyncLostMode
is set to No block but parameter HwSyncSrc is still set to PPS. This maintains
1MRK 511 407-UEN C
Phasor measurement unit RES670 2.2 IEC
Application manual