CHAPTER 2: RS485 INTERFACE IEC 60870-5-103 SERIAL COMMUNICATION
SR3 SERIES PROTECTIVE RELAY PLATFORM – COMMUNICATIONS GUIDE 2-17
Electrical interface
Optical interface
Transmission speed
Link layer There are no choices for the Link Layer.
Application layer
Transmission mode for application data
Mode 1 (least significant octet first), is used exclusively in this companion standard.
Common address of ASDU
Selection of standard information numbers in monitor direction
Table 2-4: System functions in monitor direction
Table 2-5: Status indications in monitor direction
⊠ EIA RS-485
32 Number of loads for one protection equipment
□ Glass fibre
□ Plastic fibre
□ F-SMA type connector
□ BFOC/2,5 type connector
⊠ 9600 bits/s
⊠ 19200 bits/s
⊠ One COMMON ADDRESS OF ASDU (identical with station address)
More than one COMMON ADDRESS OF ASDU
INF Semantics
⊠ <0> End of general interrogation
⊠ <0> Time synchronization
⊠ <2> Reset FCB
⊠ <3> Reset CU
⊠ <4> Start/restart
⊠ <5> Power on
INF Semantics 3 Series relay
Identifier
3 Series relay
Data Text
□ <16> Auto-recloser active
□ <17> Teleprotection active
□ <18> Protection active
□ <19> LED reset
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