
7-2
8 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE
CAUSE OF TRANSMISSION
CHAPTER 7: IEC 60870-5-103
Table 7-1: Cause of Transmission in the Monitor Direction
Table 7-2: Cause of Transmission in the Control Direction
Value
Description
<1>
Spontaneous
<2>
Cyclic
<3>
Reset frame count bit (FCB)
<4>
Reset communications unit (CU)
<5>
Start/Restart
<6>
Power on
<8>
Time synchronization
<9>
General interrogation
<10>
Termination of general interrogation
<20>
Positive ack of command
<21>
Nack of command
Value
Description
<8>
Time synchronization
<9>
Initiation of general interrogation
<20>
General command
Содержание 850
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