| 摘要 |
<p>PROBLEM TO BE SOLVED: To control illumination without increase in traffic of a transmission line by comparing the specified illumination intensity reference value with a measured value with a terminal unit, controlling a luminaire based on the difference, and controlling illumination based on manual setting when a signal from a main control device is judged as manual. SOLUTION: When an illumination control data is inputted through a receiving circuit 12, a manual control part 13 judges whether it is manual or not, and when manual switching is detected, its information is sent to a central processing unit 15. When an illumination control level based on manual setting is detected, its level is sent to the central processing unit 15. During automatic illumination control, the central processing unit 15 inputs the measured value of an illumination sensor 54 through an illumination intensity measuring part 14, compares it with a setting value (a reference value) of a terminal unit 11, and outputs a controlled illumination control signal based on the result obtained. An output circuit 16 generates an illumination control signal based on the controlled illumination control signal from the central processing unit 15 or an illumination control setting signal, and outputs the signal to a luminaire 55.</p> |
