| 摘要 |
<p>PROBLEM TO BE SOLVED: To perform lighting control desired by a user in compliance with the wiring lengths or impedance of signal lines, even if they are changed, by unifying transmission rates without fail with respect to all terminals having a common control part. SOLUTION: In this system equipped with a control part 1 for transmitting control signals, terminals 21 to 23 connected in a bus mode to the control part 1 via a signal line 4, and illuminants 31 to 33 connected to the output ends of the terminals 21 to 23, the control part 1 demands answering signals from the terminals 21 to 23 for informing the control part 1 such that they acknowledge the receipt of the control signals, the terminals 21 to 23 control optical output of the illuminants 31 to 33 by receiving the control signals, and a transmission rate of signals transmitted/received between the control part 1 and the terminals 21 to 23, is set according to whether or not an answering signal reaches the control part 1 within a fixed period of time.</p> |
