| 摘要 |
PROBLEM TO BE SOLVED: To maintain successive-connection constitution in a ring shape by switching data transmission in the section of a fault to a bus connection type data line if the fault occurs on a ring connection type data line. SOLUTION: If the fault occurs on the ring connection type data line between processors 1b and 1c, transmission data are sent from the processor 1a to the adjacent processor 1b by using the ring connection type data line 3. The processor 1b sends the data to an adjacent processor 1c since the transmission data are addressed to a processor 1d. Here, if a fault on the ring connection type data line 3 between the processors 1b and 1c is detected, switching to a data transmission bus connection type data line 2 is performed to perform transmission to the adjacent processor 1c. The processor 1c performs transmission to the adjacent processor 1d by using the ring connection type data line 3 since the transmission data are not addressed to itself. Then the processor 1d stores the transmission data. |
