If an error log is opened when the error log feature starts writing, writing to the file cannot be completed.
When the number of error messages exceeds [Number of Files to Save] in [Error Settings], the oldest file is deleted to add a new file.
If no more than 10 minutes have past since the last save, the error log file is not saved until 10 minutes passes to avoid frequent write access. If so, all summaries recorded in the 10 minutes are saved in the error log file.