| 摘要 |
PURPOSE:To switch a current circuit to a spare circuit immediately without time difference in any current circuit by storing switching information data while regarding all the combination of the current circuits and spare circuits as respective addresses, and when any one of the current circuits generates a fault, switching the defective current circuit to a spare circuit while referring to a storage means. CONSTITUTION:Reading information inputted through an input information part 51 and detecting a fault in any current circuit, a control part 52 reads out a table specifying switching while regarding the combination of all the input information for the inputted current circuits as the addresses to determine the current circuit to be switched. Then, whether the spare circuits are normal or not is decided from input information for the spare circuits. When the spare circuits are normal, the information of the current circuit to be switched is transmitted to a data transmission part 53 and a transmission terminal parallel alteration switch for the corresponding current circuit is turned. |
