| 摘要 |
PURPOSE:To maintain the signal transmission/reception among all equipments even if a defect takes place on the way of bus path by the connection using desired (N-1)-line of buses in the bus connection of ring form via N-set of buses in N-set of equipments. CONSTITUTION:If a defect takes place on the way of transmission path of a bus Ba, a master equipment 4 sends a signal to both buses Ba and Bc. The signal sent from the equipment 4 is sent consecutively by the bus Ba in an adaptor 5 before a faulty part, and a signal sent from the equipment 4 passes through a bus Bc and is sent consecutively through the bus Ba in an adaptor before the defective part and the transmission direction of each gate 6 is set so as to be sent consecutively to the bus Ba. In the setting when a defect takes place in both the transmission paths of the buses Ba and Bb, the bus Bc or Bd is used in place of the defective bus Ba and Bb. Thus, if a defect takes place, the signal transmission/reception among the entire equipments is maintained without awaiting the repair.
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