| 摘要 |
PURPOSE:To contrive improvement of a group control function so as to prevent remarkable decrease of the function in group managing control, even when one of the computers is in failure, by providing the first/second computers, memory provided in common thereof and an abnormality detecting means of the computer on an equal bus. CONSTITUTION:The first/second computers 10, 20 with a function distributed, memory 40 provided in common by these computers and an abnormality detecting circuit 30 for detecting abnormality of the first/second computers 10, 20 are provided on an equal bus system 50. In this way, improvement of a group control function can be contrived by not only making a more complicated process possible in each computer 10, 20 but also efficiently performing data transmission of large capacity between both the computers 10, 20. Even when one of both the computers 10, 20 is in failure by any possibility, the failed computer is required only separated from the bus 50 by double system constitution to backup the function by the other computer, so that remarkable decrease of the group control function can be prevented by making back up possible of high reliability. |
