| 摘要 |
PURPOSE:To allow master equipment to reset registration automatically when confirming that there is not slave equipment nearby by transmitting a signal from the master or slave equipment repeatedly by a radio communication means and confirming the presence of the slave equipment by the master equipment from whether or not a transmitted or response signal is present or absent. CONSTITUTION:The master equipment 11 or slave equipment 12 transmits the signal repeatedly by the radio communication equipment and the slave or master equipment which receives the transmitted signal transmits an answer signal in specific signal format to confirm the presence of the slave equipment by the master equipment from whether the transmitted or answer signal from the slave equipment is present or not. Namely, when the master equipment 11 transmits the signal repeatedly, it is decided that the slave equipment is nearby the master equipment if the answer signal is received from the slave equipment 12 and that there is no slave equipment nearby the master equipment if no answer signal is received. Similarly, when the slave equipment 12 sends the signal repeatedly, it is decided that the slave equipment is present nearby if the transmitted signal from the slave equipment is received by the master equipment 11 and that there is not the slave equipment present nearby the master equipment when the transmitted signal from the slave equipment is received. When the answer signal from the master equipment 11 is not received, the slave equipment 12 judges that registration is reset through, for example, the master equipment, thereby stopping the transmission from the slave equipment. |
