| 摘要 |
PURPOSE:To simplify the recovery of a unit control part from a fault, by providing a switching method with exercises control over the unit control part even from a stand-by side central control part. CONSTITUTION:In-use/stand-by doubled central control parts 1 and 2 are connected via buses 8 and 9 to switching circuits 6 and 7, which switch buses to central control part 1 or 2 by switching signal 10 from in-use/stand-by switching control part 3 and connect them to unit control parts 4 and 5. Both the switching circuit, having the function of expanding output instruction information from central control parts, give effect the switching to a bus system (stand-by side) reciprocal with the switching signal from switching control part 3. |
