| 摘要 |
PURPOSE:To prevent a loss of data in switching mode and to enhance the reliability, by providing the 1st and 2nd, master and slave buffer memories that store the data added with the time of reception through the input devices of the primary and secondary systems, thus realizing a continuous performance of the data process when an accident occurrs. CONSTITUTION:Input devices 1 and 2 of primary and secondary systems are provided to form a parallel system of an electronic computer. An input data added with the time of reception from the device 1 is applied to the 1st and 2nd primary system buffer memories 9 and 11. At the same time, the input data added with the time of reception given from the device 2 is applied to the 1st and 2nd secondary buffer memories 10 and 12. The contents of these memories are collated in time series between 9 and 10 as well as 11 and 12 through the 1st and 2nd collating devices 13 and 14 to be stored in the primary and secondary system shared memories 15 and 16 when a coincidence is obtained. Then electronic computers 3 and 4 of primary and secondary systems each are driven in parallel. In case the computer 3 has a trouble, the process of data can be continued by the memories 15 and 16. |
