| 摘要 |
<p>PURPOSE:To serve for the analysis of a fault factor and to improve maintainability by writing and preserving specific error information from the first when error information is written on an error information file of block structure, and preserving the latest information by writing following error infor mation in circulating manner on a remaining block. CONSTITUTION:The error information file is provided at the main memory of a power control digital controller, and is comprised of (n) blocks. The blocks from 0 to (m) are set as the blocks to log (initial error information) generated after the initialization of the error information file, and the (n-m) blocks from (m+1) to (n) as parts to log (latest error information) in a circulation format. The error information is logged in sequence of blocks, 0, 1, 2,... in diagnostic processing at every detection of the error. When it is required to log the error information even after processing on the block (n) is completed, overwrite from the block (m+1) that is the start of a part of circulation format is performed. In such a way, the maintainability can be improved.</p> |
