| 摘要 |
PURPOSE:To continue smoothly a control even in case of a fault of a controller, by constituting so that each control program of all controllers is contained mutually in one of other controllers, and executing a backup in case when a fault occurs. CONSTITUTION:Dispersion controlling controllers C1-C3 are coupled directly or indirectly through bus lines B1-B3 or a bus line B and a high rank computer HC. Usually, each controller C1-C3 inputs a detecting output from detectors S1-S3, which is assigned to itself, and on the other hand, brings its detecting output suitably to operation processing, etc., and controls operation panels A1- A3. Each control program of all the controllers C1-C3 is contained mutually in one of other controllers, and when a fault occurs, switches SW1-SW3 are switches, and a backup containing a control program of its faulty controller is executed. |
