| 摘要 |
PURPOSE:To perform control without causing any hindrance to data transmission among respective stations even if one station is congested with data, by providing a timer circuit which sends out data frames to a looped transmission line again a specific time after a stored point of time. CONSTITUTION:This system is equipped with a intra-station address inserting circuit 17 which inserts a intra-station address into a signal sent out of a loop control circuit 14, storage circuit 18 for storing data temporarily, and the timer circuit. The storage circuit 18 stores data temporarily under the control of the loop control circuit 14 and this data is sent again to the transmission line L after the specific time is clocked by the timer circuit 19. Then, if a frame which circulates without being fetched by any terminal station device is generated, the transmission efficiency of the looped transmission line degrades, so once this frame is discriminated by a terminal station device STO, its data is saved temporarily in its storage circuit 18 and sent out as its frame to the transmission line. This temporarily saved data is resent to the transmission line after the specific time is clocked by the timer circuit 19. |
