| 摘要 |
Control parameters that are chronologically acquired from a control unit are temporarily recorded into a random access memory. Then, a data control section records a series of control parameters within a predetermined period that have a predetermined acquisition condition into a data recording section, among the chronological control parameters recorded in the random access memory. In this case, at time of shutdown, the data control section records the chronological control parameters recorded in the random access memory into the data recording section irrespective of the acquisition conditions.
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