Yokogawa Removable Chassis DX1000N - Manual (Page 18)

IM 04L41B01-05EN
1-12
Save Operation (Always retain most recent data file/media FIFO)
When the DX saves data files automatically to the CF card, it can save them so that
the newest data files are always retained. With this method, you can use the DX
continuously, without changing the CF card.
For the setting procedure, see section 6.2 in the User’s Manual.
• Operation
When the DX is saving data to the CF card, if there is not enough space to save a
new file, the DX deletes the oldest files and then saves the new file. This operation is
referred to as FIFO (first in first out).
• FIFO is only used when the following files are saved automatically. When files are
saved using other methods, FIFO is not used.
Display data files, event data files, report data files, manual-sampled-data files, and
snapshot data files.
• Files subject to deletion
All files in the destination directory, except for the ones listed below, are subject to
deletion.
Files not subject to deletion: Hidden files, read-only files, and files contained within
subdirectories in the destination directory.
• The most recent 1000 files are retained. If there are more than 1000 files in the
destination directory, even if there is enough free memory, older files will be deleted
so that the file number remains at or below 1000.
• When there are more than 1000 files in the destination directory, one or more files
are deleted before the new file is saved. The number of files does not remain at or
below 1000 in this case.
1.2 Recording and Saving Data
File 1 File 2 File 3 File 4 Deleted Saved
Update date
Medium
Old New