GE P444

SCADA Communications
P44x/EN SC/Hb
6
MiCOM P40 Agile
P442, P444 (SC) 12-
3
CONTENTS
1 SCADA COMMUNICATIONS 7
1.1 Introduction 7
1.2 Rear port information and connection advice – EIA(RS)485 protocols 7
1.2.1 Rear communication port EIA(RS)485 interface 7
1.2.2 Courier communication 9
1.2.3 MODBUS communication 11
1.2.4 IEC 60870-5 CS 103 communication 12
1.2.5 DNP3.0 communication 12
1.3 Second rear communication port (SK4) 12
1.4 Ethernet communication 13
1.4.1 Legacy Protocols 13
1.4.2 Hot-standby Ethernet failover 13
2 COURIER INTERFACE 15
2.1 Courier protocol 15
2.2 Supported command set 15
2.3 Relay courier database 16
2.4 Setting changes 17
2.4.1 Setting transfer mode 17
2.5 Event extraction 17
2.5.1 Automatic event extraction 17
2.5.2 Event types 18
2.5.3 Event format 18
2.5.4 Manual event record extraction 18
2.6 Disturbance record extraction 19
2.7 Programmable scheme logic settings 19
3 MODBUS INTERFACE 20
3.1 Communication link 20
3.2 MODBUS functions 20
3.3 Response codes 20
3.4 Register mapping 21
3.5 Event extraction 21
3.5.1 Manual selection 21
3.5.2 Automatic extraction 22
3.5.3 Record data 22
3.6 Disturbance record extraction 23
3.6.1 Extraction mechanism 23
3.6.2 Extraction procedure 24
3.6.3 Extracting the disturbance data 28
3.7 Setting changes 30