| 摘要 |
PROBLEM TO BE SOLVED: To suppress alarm delay on a reception side due to intermittent reception and to quickly issue an interlocked alarm. SOLUTION: A pre-alarm detection part 58 detects that the occurrence probability of abnormality to be detected by a sensor part 34 becomes high and detects pre-alarm (pre-alarm). A pre-alarm monitoring part 60 transmits an event signal indicating the pre-alarm to another alarm device when detecting the pre-alarm, and changes to a cycle shorter than a normal reception cycle of a reception circuit 44 when receiving the event signal indicating the pre-alarm from the other alarm and suppresses the delay of the interlocked alarm when the event signal indicating the abnormality is received. COPYRIGHT: (C)2010,JPO&INPIT |
