Videographic Recorder
SM1000
3 Setup
IM/SM1000
Issue 11
37
3.6 Text Format Archive Files
3.6.1 Text Format Channel Data Files
Text format channel data files can be configured to contain data
gathered over a predefined period of time using the 'New File
Interval' setting – see Table 3.3.
In addition to new channel data files being created according to
the New File Interval selection, they are also created in the
following circumstances if automatic update is enabled and the
media is on-line or if a manually triggered update is in progress:
The instrument's power is lost then restored.
The instrument is taken offline and the archive media
removed, replaced or refitted.
The instrument's configuration is changed.
One of the current files exceeds the maximum permissible
size.
When the daylight saving period starts or ends.
When one of these conditions occurs, new channel data files are
created for each enabled group and the file extension index on
each new file is incremented by one from the previous file.
Example
– if the original file had an extension of .D00, after
one of the above events a new file will be created with the
same filename but an extension of .D01.
Files containing data generated during the daylight saving period
(summertime) have '~DS' appended to the filename.
Example 1
– Start of daylight saving period:
A daily file is started at 00:00:00 on 30th March 2003 –
filename: 30Mar03ProcessGroup1.D00.
Summertime starts at 2:00am on 30th March 2003.
The clock changes automatically to 3:00am.
The existing file is closed and a new file is created –filename:
30Mar03ProcessGroup1~DS.D00.
The file '30Mar03ProcessGroup1.D00' contains data
generated from 00:00:00 to 01:59:59 (before summertime
starts).
The file '30Mar03ProcessGroup1~DS.D00' contains data
generated from 03:00:00 (after summertime starts).
Example 2
– End of daylight saving period:
A daily file is started at 00:00:00 on 26th October 2003 –
filename: 26Oct03ProcessGroup1~DS.D00
Summertime ends at 3:00am on 26th October 2003.
The clock changes automatically to 2:00am.
The existing file is closed and a new file is created –filename:
26Oct03ProcessGroup1.D00
The file '26Oct03ProcessGroup1~DS.D00' contains data
generated from 00:00:00 to 02:59:59 (before summertime
ends).
The file '26Oct03ProcessGroup1.D00' contains data
generated from 02:00:00 (after summertime ends)
New File Interval
Filename
Hourly
<hour> <day, month, year>* <filename tag>
Daily
<day, month, year>* <filename tag>
Monthly
<month, year>* <filename tag>
None
<filename tag>
* Formatted according to the date format set in Common
Configuration – see Section 4.4.3, page 54
Table 3.3 New Text File Intervals
Note.
The 'New File Interval' is set in the Configuration level
Note.
The instrument's internal clock can be configured to
adjust automatically at the start and end of Daylight Saving
Time (Summertime) periods – see Section 4.4.6, page 60.
