Table 29: Information available on the local HMI (2Mb LDCM)
LHMI info Description
Setting/signal Normal
(example)
Faulty
(example)
Specification
NoOfShInterr 50 - Counter No of short interruptions, 20-50 ms
NoOfMedInterr 10 - Counter No of medium interruptions, 50-200 ms
NoOfLongInterr 5 - Counter Number of long interruptions, > 200 ms
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
LNGTHERR 0 1 Status Incorrect length for the incoming message
Table continues on next page
1MRK505382-UEN Rev. K Section 5
Communication set-up
Communication set-up, 670/650 series 87
Application Guide
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