| 摘要 |
PURPOSE:To improve the reliability of a device, by providing an interface(IF) which transfers a microprogram(muPG) and data between respective loader microprogram controllers(MPU) of plural independent controllers. CONSTITUTION:Controllers A and B which are incorporated into the same housing and are independent of each other are composed of main MPUs 1 and 5, loaders MPU 2 and 6, loaders 3 and 7, and IFs 4 and 8 respectively, and each main MPU loads a muPG from a loader through the loader MPU and operates. Assuming that a fault occurs in the loader 3, MPU2 recognizes the fault of the loader 3 after several retries and interrupts the IF8 through the IF4. The IF8 returns a response signal to the MPU2 unless data from the main MPU5 to the loader 7 is transferred, and the IF8 receives muPG load information from the MPU2 and loads it to the loader 7, and sends data to the MPU2 through IFs 8 and 4. |
