| 摘要 |
PURPOSE:To avoid confusion in a master station by transmitting abnormality detected signals from respective subordinate stations after respective specified time lengths, which are previously and separately determined for the respective subordinate stations, pass when the respective subordinate stations detect the occurrence of the abnormality of an object to be detected. CONSTITUTION:When respective subordinate stations SS1-SSn detect the occurrence of the abnormality from an object 1 to be detected, the respective subordinate stations SS1-SSn transmit the abnormality detected signals to a master station MS after the respective specified time lengths, which are previously and separately determined for the respective subordinate stations, pass. In this manner, when the respective subordinate stations SS1-SSn detect the abnormality of the object 1 to be detected, the respective subordinate stations never immediately transmit the abnormality detected signals to the master station MS but transmit the abnormality detected signals to the master station MS after the respective previously determined specified time lengths pass. Thus, the respective subordinate stations SS1-SSn can send the abnormality detected signals to the master station MS in sequence without the occurrence of a transmission overlap, and the confusion in the master station can be avoided. |
