| 摘要 |
<p>PURPOSE:To increase the transmitting speed of information while maintaining high reliability, by increasing the redundancy only for transmission of the information that had a change of state. CONSTITUTION:The state of a plant 100 is fed through a display information input part 210 of a slave station 200. The information fed through the part 210 is decided whether it includes the state change information on the corresponding word when it is cyclically transmitted through a transmission control part 220. Then the information is transmitted twice continuously and just once to a master station 300 via parallel-serial signal converting part 230 and a signal transmitting part 240 when the information includes above-mentioned state change information and does not include respectively. The station 300 receives the information at a signal receiving part 310 and delivers it to a distribution control part 330 after the signal is converted at a serial-parallel signal converting part 320. The part 330 uses a primary storage part 340 as a buffer to decide the coincidence between the informations which are transmitted twice and continuously and stores the coincidence in an information storage part 350.</p> |
