| 摘要 |
PURPOSE:To discriminate a faulty position rapidly, by making the light adjustment mode of the illumination load for the fault of the main operation board different from that for the fault of the terminal equipment in the remote control unit of the illumination load. CONSTITUTION:Main operation board 11 is connected to electric power source line 12, signal transmission line 13, and timing signal line 14, and terminal equipments 15a-15d are connected to lines 12, 13 and 14. Terminal equipments 15a-15d discriminate addresses of their own stations from signals transmitted through signal transmission line 13, and the light adjustment mode of illumination loads 17a-17k is controlled through light adjusting equipments 16a-16f. For the fault of main operation board 11 and transmission line 13, terminal equipments 15a-15d generate fail safe outputs to set the control mode to the full light mode; and for the fault of terminal equipments themselves, the step light adjustment mode is set by the stop of the control output. |
