Yokogawa Removable Chassis DX1000N - Manual (Page 43)

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IM 04L41B01-01E
Save Operation (Constantly Retaining the Most Recent Data Files Using Media
FIFO) (Release Number 2 or Later)
When saving the data files automatically, you can save the data so that the most
recent data files are constantly retained in the CF card. This method allow you to use
the DX continuously without having to replace the CF card.
• Operation
File 1 File 2 File 3 File 4 Deleted Saved
Update date
Medium
Old New
If not enough free space is available when saving a new data file to the CF card,
files are deleted in order from the oldest data update date/time to save the new file.
This operation is referred to as FIFO (First In First Out).
• The FIFO operation is carried out only when saving the following files
automatically. It is not carried out when saving files to the save destination
directory using another method. Display data files, event data files, report data
files, manual sample data files, and snapshot data files
• Files that are deleted
All the files in the save destination directory are applicable to be deleted.
However, the following files are excluded. Hidden files, read-only files, files in
the subdirectory within the save destination directory
• The most recent 1000 files are retained. If the number of files in the save
destination directory exceeds 1000, the number of files is held at 1000 by
deleting old files even if there is enough free space.
• f there are more than 1000 files already in the save destination directory, one or
more files are always deleted before saving the new file. The number of files is
not kept within 1000 in this case.
• Manual Save (Collectively Storing Unsaved Data)
Unsaved data in the internal memory is stored in unit of files to the external storage
medium when an external storage medium is inserted and a given operation is carried
out.
Time
Saved the
previous time
Save operation
File File File
Saved this time
When using manual save, it is important that you save the data in the internal memory
to the external storage medium before the data is overwritten. Determine the usage
condition of the internal memory and save the data to the external storage medium at
appropriate times.
Save Destination
You can select a CF card or USB flash memory (/USB1 option).
Data Save Destination Directory
You can set the data save destination directory name (DATA0 by default).
1.4 Data Storage Function