| 摘要 |
PURPOSE:To economize the station device and to employ pair cables for transmission lines, by constituting information sources scattered over a wide range spatially into one group and performing the exchange of information in the froup. CONSTITUTION:The system is constisuted that data pass through all slave stations serially by taking a master station 1 as the start point through the line group having the number of lines equal or more than the number of a plurlaity of slave stations 21, 22, 23-2n scattered spatially and the terminal point is returned again to the master station 1. The master station 1 and all the slave stations are tied mutually with each individual line in the line group. The information is unidirectionally transmitted from the start point to the terminal point of the line group. The transmission and reception terminals of an arbitrary line in the line group are connected between the start and terminal points of the line group of the master station 1. Then, the exchange of information can be done between arbitrary two stations in the group including the master station 1 and the slave stations 21, 22, 23-2n. |
