| 摘要 |
PURPOSE:To monitor excellently the whole of a system by connecting commonly alarm signal lines of individual devices and inputting an alarm signal to individual devices and an alarm signal receiver circuit of a system monitor device simultaneously. CONSTITUTION:If abnormality is detected by a control part 10 of a device T21, it is reported to a line driver 11, and devices T21 and T22 in the same system detect a power-off indicating input to turn off power sources. Meanwhile, a signal on an alarm signal line l is reported to a processing part 19 through a line receiver 12 and an abnormality detecting part 13 in a monitor device 1, and abnormality of the device T21 of the system is detected and is indicated to an external output part 14 and is displayed on a display part 15, and an external alarm device 2 is started as required. If an external abnormality detector 3 detects abnormality or an operating part 16 indicates power-off or a system other than the abnormal system requires power-off, the processing part 19 outputs a power-off signal to the alarm signal line l through an indicating part 18 and a driver 11. |
