| 摘要 |
PURPOSE:To provide controllability for illumination suitable to the set environment of a dimmed lighting fixture and by-window illumination by feeding the lighting fixture with a dimming control signal produced through selection dimming data etc., which are passed from a main operation board, in accordance with the contents of a ROM table furnished at a signal producing terminal unit. CONSTITUTION:A control data is prepared on the basis of a schedule previously stored or operation of switches etc., on a main operation board 1 and transmitted to on/off terminal units 5, and put-on or shutoff of the illuminating power is controlled. At a signal producing terminal unit 7, on the other hand, plural pieces dimming data are fed into a buffer memory 21 from the main operation board 1, and desired ones of them are selected according to the stored data in a ROM 19. A dimming control signal having desired control characteristics is produced by calculating the selected dimming data and the output of a daylight sensor 13 at a calculation/processing circuit 23, and the produced signal is delivered to the lighting fixture. Here the upper and lower limits of the output from daylight sensor 13 are previously set by an upper limit and a lower limit setting device 15, 17, and dimming control signal is produced within an effective range specified by these setting values. |
