| 摘要 |
A plurality of pieces of candidate information capable of serving as device identification information are divided into a plurality of groups in advance. Each of the plurality of groups is provided with group identification information. A master control unit sequentially outputs pieces of group identification information to a signal line. When group identification information of a belonging group of a device flows through the signal line, a control unit of the device outputs device identification information, stored by the control unit, to the signal line. In this case, a control unit outputs the device identification information after the group identification information is received and then a standby time has elapsed. The standby time is set on the basis of the order of the device identification information of the device within a belonging group. The master control unit provides an address to the received device identification information. |
