1 CHAPTER OVERVIEW
The MiCOM products support substation automation system and SCADA communications based on two
communications technologies; serial and Ethernet. Serial communications has been around for a long time,
and there are many substations still wired up this way. Ethernet is a more modern medium and all modern
substation communications is based on this technology. Alstom Grid's MiCOM products support both of
these communication technologies.
This chapter contains the following sections:
Chapter Overview 193
Communication Interfaces 194
Serial Communication 195
Standard Ethernet Communication
198
Overview of Data Protocols 199
Courier 200
IEC 60870-5-103 204
DNP 3.0 207
MODBUS 210
IEC 61850 223
Read Only Mode 229
Time Synchronisation 231
Demodulated IRIG-B 232
SNTP 233
Time Synchronsiation using the Communication Protocols 234
Communication Settings 235
MiCOM P747 Chapter 7 - SCADA Communications
P747-TM-EN-1 193
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