LHMI info Description
Setting/signal Normal
(example)
Faulty
(example)
Specification
CommStatus OK NoRXD Status Communication status/no of
received messages
COMFAIL 0 1 Status Communication failure, differential
protection blocked. Analog values
are substituted with zero, ref.
disturbance recorder
COMALM
0 1 Status Communication alarm
(COMFAIL>set delay 100 ms in
service, 5-10 ms for fault tracing)
NoOfTXD
100.00 > 100 Status % No of sent messages
NoOfRXD 100.00
> 75
1)
Status % No of received messages
TransmDelay in
Echo mode 1)
2 ms - Time Round trip delay/2 + set asymmetric
delay
Transmission
delay in GPS
mode 1)
2 ms
- Time Actual transmission delay +
measured asymmetric delay (+or -)
AsymDelay 1) 0.5 ms - Setting / GPS
ms
Asymmetric delay (Setting in echo
mode or measured with GPS timing)
OPTPOWER –14.895 dBm Value Measured received optical power
BLKDIFF 0 1 Status Differential protection blocked by
communication
ADDRERR 0 1 Status Incoming message from a non-valid
address
RxAddress 2 ≠ 2 Received address from remote end
ConfAddress 2 - Configured remote address
RED_ACT 0/1 - Status Redundant channel 0=inactive
1=active
CRCERROR 0 1 Status CRC error in incoming message
TRDELERR 0 1 Status Transmission delay error, > 40 ms
SYNCERR 0 1 Status Error in echo timing synchronization
REMBLKDF 0 1 Status Error in received message at remote
end
GPSERROR 0 1 Status Error in GPS synchronization at
local or remote end
NOCARR 0 1 Status No carrier is detected in the
incoming message. Group signal -
Logical OR for:
• LINK_LOST (no input data
stream at the optical receiver)
• SYNC_LOST (clock
synchronization is lost)
• C37 ERROR (error at the
C37.94 fiberoptic receiver:
faulty format)
NOMESS 0 1 Status No start and stop flags in the
incoming message
Table continues on next page
Section 5 1MRK 505 382-UEN B
Communication set-up
96 Communication set-up 670/650 series 2.2
Application Guide
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