H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/15 (2006.01) H04L 12/56 (2006.01) H04Q 7/02 (1990.01)
Patent
CA 2129431
2129431 9316532 PCTABS00025 A SCADA communication and control system is used for controlling power distribution. The system includes a master controller, a master radio and a plurality of remote terminal units (RTUs). A communication link between the master controller (12) and the master radio (14) has two channels. A first channel is for sending master controller messages to the master radio (14). The second channel is for the master radio (14) to send the RTU response messages back to the master controller (12). A supplemental controller (32) along with supplemental remote terminal units (SRTUs) (34) also are included for expanding the range of the system. A switch (38) is included in the second channel so as to selectively link either the supplemental controller (32) or the master radio (14) to the master controller (12) for providing response messages. The supplemental controller (32) monitors the first channel to identify messages having an STRU address. When such a message is identified, the switch (38) is set to select the supplemental controller (32). The supplemental controller (32) includes a main task for monitoring and testing master controller messages.
Fetherstonhaugh & Co.
Itron Inc.
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