| 摘要 |
<p>PURPOSE: To accurately match the time of a clock circuit of each terminal device in units of ms in a system consisting of a central device including a clock circuit and a plurality of devices which are connected to the central device by a serial communication line and include the clock circuit each. CONSTITUTION: A central device and a plurality of terminal devices including a clock circuit each are connected by a serial communication line. The central device transmits transmission clock data which are configured by a certain number of bits successively at a certain time interval to each terminal device and each terminal device obtains the difference between the reception time data which is obtained by adding a certain communication required time determined for each terminal to the transmission time data received by the central device and the time of a built-in clock circuit as a compensation value and then stores the difference (S1, S2). When compensation value data within a certain range are obtained for a determined number of times (n) (S3, S4, and S5), the clock circuit of the terminal device is corrected based on n compensation values.</p> |
