| 摘要 |
PURPOSE:To execute the setting of relay operation for each relay station accurately in a short time. CONSTITUTION:When a master station B makes line setting to decide a time slot for data communication, a relay operation setting command is sent to each of slave stations T1, T2, and an acknowledge signal is returned from a concerned slave station. In this case, each of relay stations R1-R3 monitors the acknowledge signal and when the acknowledge signal is detected based on a time slot, a fixed relay mode is set, when no acknowledge signal is detected, a fix inhibit mode is set and an electric field relay mode is set for other time slots. Thus, since the relay operation of each relay station is set automatically by the line setting of the operator only, the relay operation is set surely in a short time. |
