| 摘要 |
PURPOSE:To prevent the delay in the data collection at mode selection, by providing the mode selection circuit and mode selection detection circuit respectively to the master and slave stations. CONSTITUTION:In selecting from (N/2, N/2) mode to (1, N-1) mode, the master stations 4, 5 produce the mode selection signal from the mode selection instruction circuit 23 and it is delivered from the transmission circuit 8 to the slave stations. When the reception circuit 10 of the slave station 3-k...3-N receives the mode selection signal, the mode selection detection circuit 24 is connected to the transmission circuit 13 to stop the delivery of upstream signal. In the master station, in response to the selection mode of the master station in the station selection instruction circuit 22, the address signal of the slave station being objective for the selection control or selection measurement is produced and transmitted. Together with the address of the said slave station, the down stream signal is transmitted to immediately establish the synchronism between the master and slave stations. |
