| 摘要 |
PURPOSE:To prevent a malfunction by starting one-shot timer when each of opening-closing control switches for a smoke-eliminating window is pushed and operated and utilizing pulse signals output for a fixed time as opening- closing command signals. CONSTITUTION:The starting of the pushing operation of a closing control switch SWa and an opening control switch SWb is detected by a rise detector 7. A pair of one-shot timers T1, T2 are triggered by detected rise signals, and pulse signals output for a fixed time from each of the timers T1, T2 are used as opening-closing command signals. The opening-closing command signals output from the timers T1, T2 are inputted to each of the monitor repeaters 3 of a smoke-elimination preventive control system S, and received by a smoke- elimination preventive receiver 4. The opening-closing command signals are transmitted over a smoke-eliminating window control panel 6 through a smoke- elimination preventive repeater 5, and the control panel 6 drives a smoke- eliminating window and opens and closes the window only for the time of the command signals. Accordingly, the opening-closing command signals are overlapped simultaneously, thus obviating transmission over the smoke- elimination preventive control system as they are. |
