Archiving Updates; File Formats; Digital Signatures - ABB SM2000 User Manual

...3 SET UP

3.4.9 Archiving Updates

Data from the instrument's internal memory is archived to
external memory in the following circumstances:
• Automatically, if 'Update type' is set to 'Automatic' during
configuration.
• When the operator selects 'Update' from the Set Up
menu.
• When a digital signal assigned to the archive update
source becomes active.
If there is un-archived data more than one hour old when
the external media is inserted or placed on-line, or when
'Update' is selected from the Set Up menu, the operator is
prompted to select the data to be archived:
Select the amount of data to archive
No historical data
< 1 hour old
< 2 hours old
< 4 hours old
< 8 hours old
< 12 hours old
< 1 day old
< 2 days old
< 3 days old
All historical data
28
More than 1 hour of
unarchived data has been
detected. Please select the
amount of data to be archived
and press enter.
Fig. 3.4 Channel Data File Sample
If a large amount of unarchived data exists, a progress bar
appears. During this time operator views cannot be
accessed, but new data continues to be recorded to the
internal buffer memory.
Updating Archive...
3.4.10 File Formats – Figs. 3.4 to 3.7
The archived data is stored in a comma delimited (*.csv) format
so that it can be imported directly in to a standard spreadsheet
– such as Microsoft Excel™ and Lotus 1-2-3™. The files can
also be read as an ASCII text file by a text viewer. When imported
in to a spreadsheet, the files appear as shown in
Figs. 3.4 to 3.7.

3.4.11 Digital Signatures

A digital signature file is created for each channel data file using
the same filename but with a *.S** extension. The file contains a
unique 'fingerprint' of the contents of the data file that can be
used to prove if the data has been tampered with or corrupted.
Data validation can be carried out on a PC using the Company's
DataManager software.
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