Hitachi 670 Series Application Manual page 93

1MRK505382-UEN Rev. K
Table 29:
LHMI info
Setting/signal
NoOfShInterr
NoOfMedInterr
NoOfLongInterr
CommStatus
COMFAIL
COMALM
NoOfTXD
NoOfRXD
TransmDelay in Echo
mode 1)
Transmission delay
in GPS mode 1)
AsymDelay 1)
OPTPOWER
BLKDIFF
ADDRERR
RxAddress
ConfAddress
RED_ACT
CRCERROR
TRDELERR
SYNCERR
REMBLKDF
GPSERROR
NOCARR
NOMESS
LNGTHERR
Table continues on next page
Communication set-up, 670/650 series
Application Guide
Information available on the local HMI (2Mb LDCM)
Normal Faulty
(example) (example)
50
10
5
OK
0
0
100.00
100.00
2 ms
2 ms
0.5 ms
–14.895
0
0
2
2
0/1
0
0
0
0
0
0
0
0
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Specification
- Counter
- Counter
- Counter
NoRXD Status
1 Status
1 Status
> 100 Status %
Status %
1)
> 75
- Time
- Time
- Setting / GPS
ms
dBm Value
1 Status
1 Status
≠ 2
-
- Status
1 Status
1 Status
1 Status
1 Status
1 Status
1 Status
1 Status
1 Status
Communication set-up
Description
No of short interruptions, 20-50 ms
No of medium interruptions, 50-200 ms
Number of long interruptions, > 200 ms
Communication status/no of received
messages
Communication failure, differential
protection blocked. Analog values are
substituted with zero, ref. disturbance
recorder
Communication alarm (COMFAIL>set
delay 100 ms in service, 5-10 ms for fault
tracing)
No of sent messages
No of received messages
Round trip delay/2 + set asymmetric delay
Actual transmission delay + measured
asymmetric delay (+or -)
Asymmetric delay (Setting in echo mode
or measured with GPS timing)
Measured received optical power
Differential protection blocked by
communication
Incoming message from a non-valid
address
Received address from remote end
Configured remote address
Redundant channel 0=inactive 1=active
CRC error in incoming message
Transmission delay error, > 40 ms
Error in echo timing synchronization
Error in received message at remote end
Error in GPS synchronization at local or
remote end
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)
No start and stop flags in the incoming
message
Incorrect length for the incoming message
Section 5
87