| 摘要 |
<p>PURPOSE:To shorten data gathering time without providing a complicated circuit by retriggering a timer circuit with a frame synchronizing signal to extend the turn-on time successively and allowing slave stations to respond in order from the slave station having less variance. CONSTITUTION:A master station 1 transmits continuously the commands of plural blocks for general data gathering through a control station 3. When each of slave stations 2a-2n receives any command, a timer circuit 9 is operated while being retriggered at every reception of the frame synchronizing signal in the command. The timer circuit 9 is turned off when a time corresponding to the data frame synchronizing signal. The slave station whose timer circuit 9 is turned off first out of slave stations 2a-2n transmits a response signal from a response signal starting circuit 10 through a transmission data processing circuit 11, etc. simultaneously with turning-off of the timer circuit 9. Therefore, the timer circuits 9 of slaves stations in slow circuit operation out of slave stations 2a-2n are retriggered by the frame synchronizing signal in the response signal of slave stations in quick circuit operation, and the transmission of the response signal from slave stations in slow circuit operation is held until the transmission of slave stations in quick circuit operation is terminated.</p> |
