DEVICE AND METHOD FOR OPTICAL COMMUNICATION

摘要

PROBLEM TO BE SOLVED: To perform optical communication between a master unit and a specified slave unit without using a logical address allocated to the slave unit. SOLUTION: The master unit 401 transmits a line insuring enabling signal in accordance with a line insuring request signal transmitted from the slave unit 402, the slave unit 402 receiving the line insuring enabling signal after transmitting the line insuring request signal performs data communication to the master unit 401, a slave unit 403 receiving the line insuring enabling signal without transmitting a line insuring request signal is made a transmission inhibition state, the master unit 401 transmits a line release signal to all of the slave units 402 and 403 after finishing the data communication, and the slave units 402 and 403 receiving the line release signal are shifted into a communicable state after prescribed time passes.