ABB RES670 Technical Manual page 668

Section 19
Station communication
662
Unspecified] [OR] merging unit is not time synchronized [smpSynch
flag in datastream is equal to 0]
• when SyncLostMode = NoBlock, the merging unit samples are not
received
• TESTMODE:
• NO[0] indicates that No merging unit analog channels are in testmode
• YES[1] indicates that one/more subscribed channels are in testmode
• SIMMODE:
• NO[0] indicates that normal data is received and are accepted
• YES[1] indicates that the received datastream is tagged as simulated and are
accepted
Internal substitution can happen during the following conditions:
1. Transient block after receive error (sample loss)
2. Transient block after Simulated/Real Sample value stream transition
3. Transient block after recovery from substitution
4. No data from merging unit
5. Bad data from merging unit
6. Merging unit report lost sync[smpSynch=0] and SyncLostMode = Block/
BlockOnLostUTC
7. IED time quality of hardware is not good [not within set value SyncAccLevel] and
SyncLostMode = Block/BlockOnLostUTC
8. Merging unit channel reported with quality other than good
9. Merging unit channel/channels is/are in testmode and the IED is not in testmode
During Internal substitution, the functions connected to that particular merging unit
will be blocked and the merging unit channel's analog values will be forced to 0 with
quality as Invalid, Substituted, Failure.
Timeout
TSYNCERR Indicates that there is some timeout on any configured time source or the
time quality is worse than specified in SynchAccLevel. The timeout is individually
specified per time source (PPS, IRIG-B, SNTP etc.) See section
TIMESYNCHGEN"
Blocking condition
Blocking of protection functions is indicated by (SMPLLOST is high) or (MUDATA is
high)
1MRK 511 408-UUS A
"Time synchronization
Phasor measurement unit RES670 2.2 ANSI
Technical manual