| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a fire alarm facility capable of restricting current consumption required for relay processing of wireless signals. <P>SOLUTION: A fire alarm facility 100 includes lower-level devices in a communication hierarchy performing state collection processing for transmitting state information signals including their own device state information on the basis of state request signals transmitted from a higher-level device in the communication hierarchy. In the state collection processing, a wireless relay B, a repeater relay C, and a sensor D transmit a state request signal or a state information signal to a transmission destination, if the device of the transmission destination is a wireless relay B or a repeater relay C, and thereafter, the wireless relay B or the repeater relay C of the transmission destination actuates a predetermined time reception function and performs reception processing to receive the state request signal or the state information signal to be transmitted to its relay destination. <P>COPYRIGHT: (C)2013,JPO&INPIT |
