| 摘要 |
The communication module for a multi-air conditioner system, which has a plurality of indoor units and one outdoor unit for controlling the indoor units, includes a power circuit in each of the indoor units and outdoor unit. The power circuit is connected to a non-polarized two-wire power line to supply a drive power to a corresponding one of the indoor units and outdoor unit. A transmitter/receiver circuit is also included in each of the indoor units and outdoor unit, and is connected to the power line to convert information to be transmitted into a pulse form, which carries the converted result in an alternating current voltage to transmit the information through the power line and receive information from the power line. A microcomputer included in each of the indoor units and outdoor unit controls an associated system operation according to the information from the power line received by the transmitter/receiver circuit. Further, upon supply of power to the system, the outdoor unit calls the indoor units and sequentially assigns addresses to the indoor units transmitting responses earlier than the others.
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