| 摘要 |
An objective of the present invention is to reduce time for acquiring a load state notification signal relating to each load state when power is switched on, in a system which is suited to load control of such as an illumination device of a non-residential facility, and which carries out transmission and reception of a signal between a load control device and a central control device via wireless communication with radio. After power of wireless communication devices (2, 3) is switched on, load state acquisition signals are transmitted from the wireless communication devices to a plurality of load control devices (21-35) which are slaved, one at a time. Upon receiving the load state acquisition signals, the load control devices (21-35) transmit load state notification signals which denote the states of the loads which the load control devices control. Upon receiving the load state notification signals, the wireless communication devices (2, 3) transmit the received load state notification signals via wired connections to a central control device (1). |
