| 摘要 |
PURPOSE:To prevent missing of real information from a terminal station slow in the transmission speed by superimposing new real information of a controller of an own station on an idle slot frame from the controller of the pre-stage and transmitting the result. CONSTITUTION:When new real information to be transmitted to a controller B1 of a terminal station A1 is generated, the device B1 selects and fetches the real information of the own station circulated once throughout the transmission line C by selecting information. An idle slot frame is transmitted at the same time and the device B1 superimposes the new real information of the own station to the idle slot frame transmitted from any one of controllers BN-B2 of terminal stations AN-A2 of the pre-stage. These operations are repeated sequentially at the terminal stations A1-AN, the real information from the controllers B1-BN is transmitted one after another to the transmission line C and the real information is transmitted and received among optional controllers. |
