| 摘要 |
PURPOSE:To prevent a write command signal bus or the like from being carelessly activated at the time of loading/unloading a CPU card by resetting only the CPU card by the operation of a CPU reset means, and after replacing the CPU card, restarting processing on the basis of a signal from a discriminating means. CONSTITUTION:When a fault is generated in the CPU card 2, an operation stopping means 36 stops a CPU part 32 and an inhibiting means 37 prohibits that a specific signal such as a write command signal outputted from the CPU part 32 from being sent to a bus. When only the CPU reset means 39 is driven, only the CPU card 2 is reset without resetting a PIO card 4 by means of discriminating means 40, 41, and after replacing the CPU card 2, the processing is restarted from a state obtained at the time of generating the fault. Consequently, the write command signal bus or the like can be prevented from being carelessly activated at the time of loading/unloading the CPU card 2. |
