| 摘要 |
PURPOSE:To properly grasp the situation at a time when an abnormality occurs and to execute a suitable error processing by writing the operating state of a system at the time when the abnormality is detected in a nonvolatile memory. CONSTITUTION:A timer 4 is started, and if a response to an access data comes or if the timer 4 reaches an overtime state is monitored. The content of an error at the time when a time-over occurs is examined, and the result is written in the error content storing area of the nonvolatile memory 11, then the number of an equipment operating at said time is read out from the prescribed position of a memory 3, and it is written similarly in the error equipment number storing area of the memory 11. As a result, it can be made possible to read out the situation of an error-occurrence and to analyze it, even when a reset key or others on a final control element 7 is depressed by the interruption of power source. |
