| 摘要 |
PURPOSE:To prevent an unuseable state from being entered by recording a detected result of a connection signal from the input/output device of one system and an information of the route indicating circuit of one system and the route indicating circuit of the other system, and informing a central processor of the structure state of their connection line and the connection state of the input/ output device. CONSTITUTION:The controllers 5-0 and 5-1 of input/output devices 2-0 and 2-1 switch connections between data transmission and reception part 70 and 71 and the devices 2-0 and 2-1 by transfer switching parts 60 and 61 and route indicating circuits 800 and 810 indicate connections in their systems and with the other systems under the control of central processors 6-0 and 6-1. Then the switching parts 60 and 61 are controlled with the combination of information of the circuits 800 and 810 of their system and the circuits 810 and 800 of the other system and connection signals P from the devices 2-0 and 2-1, the information of the circuits 800 and 810 of their system, and the information of the circuits 810 and 800 of the other system are recorded by recording means 50 and 51, and the structure state of the connection line and the connection state of the devices 2-0 and 2-1 are reported to the devices 6-0 and 6-1. |
