ABB RELION 670 Series Technical Manual page 1223

1MRK 502 066-UUS B
Table 938: LDCMRecBinStat2 Monitored data
Name
CommStatus
Table 939: LDCMRecBinStat3 Monitored data
Name
CommStatus
19.1.7 Operation principle
The communication is made on standard ITU (CCITT) PCM digital 64 kbit/s channels. It is a two-
way communication where telegrams are sent every 5 ms (same in 50 Hz and 60 Hz), exchanging
information between two IEDs. The format used is C37.94 and one telegram consists of start and
stop flags, address, data to be transmitted, Cyclic Redundancy Check (CRC) and Yellow bit (which
is associated with C37.94).
Start
flag
8 bits
IEC01000134 V1 EN-US
Figure 618: Data message structure
Technical manual
Type Values (Range)
BOOLEAN 0=Ok
1=SyncErr
2=No RXD
3=LocalGPSErr
4=RemGPSErr
5=LocAndRemG
PSErr
6=LocalADErr
7=RemADErr
8=LocAndRemA
DErr
9=AddressErr
10=FreqConfErr
11=LatencyConf
Err
Type Values (Range)
BOOLEAN 0=Ok
1=SyncErr
2=No RXD
3=LocalGPSErr
4=RemGPSErr
5=LocAndRemG
PSErr
6=LocalADErr
7=RemADErr
8=LocAndRemA
DErr
9=AddressErr
10=FreqConfErr
11=LatencyConf
Err
Information CRC
n x 16 bits 16 bits
en01000134.vsd
Unit Description
- Status of communication link
Unit Description
- Status of communication link
Stop
flag
8 bits
Section 19
Remote communication
PID-4013-MONITOREDDATA v4
PID-3874-MONITOREDDATA v4
M12452-14 v3
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