| 摘要 |
PURPOSE:To attain sure transmission/reception of a signal by providing relay function of a signal sent to a slave station. CONSTITUTION:A master station 2 forms signals (3a, 3b, 3c; S) to be sent. The slave station receives an address part of a signal, the 1st address of the signal is discriminated and it is received by the slave station 3A only having the 1st relay address 3a. The slave station 3A discriminates the final address of the reception signal whether it is an address of the own station or not, and when the address is not for the own station, the 1st address 3a is erased, and a signal (3b, 3c; S) is sent newly. After the signal is received by the next slave station 3B, a signal (3c; S) is sent newly from the slave station 3B. The slave station 3C receiving the said signal discriminates whether the final address 3c is for the own station, receives the signal S and not sent. Thus, the signal is sent surely to a slave station as a reception station at a remote location from the master station.
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