| 摘要 |
PURPOSE:To surely write data in a responsor by transmitting a command, which sets the state only for reception, from an interrogator to the responder which passes a beam area and setting the state only for reception in the responsor at the time of reception of the command from the interrogator and inhibiting reception after data write to a storage part. CONSTITUTION:The interrogator reads out data to be written to the responder from a RAM (S10). Data is transmitted to the responder together with a write command, which does not request a response (S11). This write command sets the responder to the state only for reception. Next, it is discriminates whether stop is indicated or not (S12). If it is indicated, the operation is stopped, and the responder discriminated whether the write command is received from the interrogator or not (S20); and when the responder is in the beam are of the interrogator, the responder receives the write command and releases the holding state. Next, the validity of the command is discriminated (S21); and when it is not erroneous, the responder is set to the state only for reception and registers data from the interrogator in a RAM (S22) and discriminates the elapse of the reception inhibition time (S24) to terminate the reception. |
