100/180 MM GRAPHICS RECORDER: USER GUIDE
User Guide
Page 75
HA261742
Issue 16 Nov 04
4.3.5 ARCHIVE CONFIGURATION (Cont.)
COMPRESSION
Select Normal or high compression. 'Normal' compresses the data but still provides an exact copy. 'High' compresses
more, but channel values are saved only to 1 part in 10
8
resolution. This field does not apear if 'CSV' is selected as
file format (see below)
FLASH SIZE
Allows the size of the Flash memory to be viewed by the user.
SHORTEST TREND HISTORY / DURATION
This shows which group has the shortest amount of Flash memory allocated to its history record. Providing the ar-
chive period is less than the value displayed in the Duration window, no data will be lost from any group. If the ar-
chive period is greater than this value, then some of the data in one or more groups will have been overwritten and
therefore lost.
If there is more than one group with the same Shortest Trend History Duration, the group with the lowest number is
displayed. (E.G. If groups two and four both have the same duration, 'Group 2' will appear in this window.)
Note: Trend history duration depends on many factors, as described in Group Configuration (section 4.3.2)
above.
CSV CHECKBOXES, DATE/TIME FORMAT
These appear only if the CSV option is fitted, and the 'Media File Format' or 'FTP file format' are set to either 'CSV' or
'Binary and CSV'. Refer to the CSV option description at the end of this subsection (4.3.5)
SHOW
This allows the fields which are to appear below 'Show' to be applicable to disk (Disk Settings), or to the setting up of
a remote host path for archiving purposes (Remote settings). The following descriptions contain all the fields which
may appear in either menu.
ARCHIVE TO MEDIA
For Disk Settings only:
None
Archive to disk is initiated by the operator (section 4.1)
Hourly
Archive to disk occurs on the hour every hour
Daily
Archive to disk occurs at 00:00* hrs each day
Weekly
Archive to disk occurs at 00:00* hrs every Monday
Monthly
Archive to disk occurs at 00:00* hrs on the 1st of each month
Automatic
The recorder selects the slowest out of Hourly, Daily, Weekly or Monthly, which is guaranteed not to
lose data. This is calculated according to which of the trend history buffer or the disk is the smaller.
The recorder assumes that the disk is 'empty' when making these calculations.
*Note: Archive times are not adjusted for Daylight Saving hour changes. Thus if the archive is set to 'daily',
'weekly' or ' monthly' then, during 'Summer Time', the archive will occur an hour late (i.e. at 01:00 hrs. instead
of midnight).
MEDIA FILE FORMAT/FTP FILE FORMAT
These configuration items appear only if the CSV option is fitted. Allows 'Binary' (.uhh) files, 'CSV' (.csv) files or
'Binary and CSV' to be chosen for FTP transfer. Please see the CVS option description at the end of this subsection
(4.3.5).
If the recorder has been powered
down prior to archive time, the
archive takes place the next time the
unit is powered up.
