Radio communication system

A radio communication system comprising first through Nth (N≧2) slave devices and a master device for receiving messages from these slave devices, wherein:

• the master device comprises:
• a slave information storing device storing, as slave information, a maximum connectable number of slave devices and a reporting period for address information from slave devices;
• an address information report requesting device broadcasting, at at least the time of startup, the slave information to the first through Nth slave devices to request reporting of address information from the first through Nth slave devices;
• and
• a logical address redundancy detector detecting a redundancy in the logical addresses set in the first through Nth slave devices based on the logical addresses and communication addresses reported, as address information, from the first through Nth slave devices in response to the address information report request from the address information report requesting device;
• wherein
• the first through Nth slave devices comprise:
• a device information storing device storing, as device information, a device number that is determined sequentially with the maximum connectable number of slave devices as the maximum value, and a logical address and a communication address that are set as local address information;
• an address information report timing calculator receiving the address information report request from the master device, and for calculating the timing for reporting the local address information based on the maximum connectable number of slave devices, which is received as slave information, the address information reporting period, and the device number that is stored as device information;
• and
• an address information reporting device reporting, to the master device, local address information that is stored as device information, with each address information reporting period, in accordance with the report timing calculated by the address information report timing calculator.