Archiving - ABB SM1000 User Manual
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Also See for SM1000:
- User manual (134 pages) ,
- Replacing instructions (8 pages) ,
- Installation instructions manual (8 pages)
Table of Contents
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...4 CONFIGURATION
4.5.6 Archiving
Introduction
Recorded data, logs and configuration files stored in the
instrument's internal memory can be archived to files created in
removeable media. Parameters for archiving Process Group 1
are setup independently from Process Group 2 parameters.
File Formats
The archived data is stored in a comma separated file ('.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 may also be read as an ASCII text file by a text viewer – see
Section 3.4.
Archiving Updates
Saving data to the removable archive media can be triggered in
a number of ways:
•
Automatic update (archive update type set to automatic on
archive configuration).
•
Update request selected from the setup menu.
•
Digital signal assigned to the archive update source in
configuration.
Archive File Types
Archive files created by the instrument are given filenames
automatically. Each type of archive file is given a different
filename extension:
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Note. Totalizer files are created only if the totalizer
option is fitted.
Channel Data Files
Channel data files can be configured to contain data gathered
over a predefined period of time:
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In addition to new files being created according to the New File
Interval selection they are also created under the following
conditions if an automatic update is enabled and the media is
on-line or 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.
46
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. 1
•
The instrument's configuration is changed.
•
One of the current files exceeds the maximum permissible
size.
•
Historical review mode is accessed.
If one of these conditions occurs, new channel data files are
created (for each enabled Process Group) and the 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 is created with the same
filename but with an extension of .D01.
Log files
The Alarm Event, Totalizer and Audit Logs are each archived into
one file. The filenames have the following formats, with the date
and the time indicating the first entry in the file:
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Note. Totalizer logs are created only if the totalizer
option is fitted.
If one of the archive log files becomes full (>64 000 entries) a new
file is created with an extension incremented by 1, e.g. a01, e01
etc.
e
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
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unique 'fingerprint' of the contents of the data file that can be
used to prove if the data has been tampered with or corrupted.
e
Data validation can be carried out on a PC using the Company's
DataManager software.
Data Verification and integrity
f
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When data is saved to the archive media it is checked
automatically to verify that the date value stored on the media
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matches exactly what is stored in the internal memory.
Backing up Archived Data
It is advisable to back-up critical data stored on SmartMedia or
Compact Flash cards on a regular basis. The instrument's
internal memory provides a buffer for the most recent data so if
data stored on archive media is lost, it can be re-archived – see
Reset Archiving on page 23.
To ensure that all required data is available for re-archiving, it is
recommended that data archived on archive media is removed
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>
and backed-up before the instrument's internal buffer
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overwrites that data. The amount of time that data remains in the
instrument's internal memory depends on the sample rate and
the number of channels selected. See Table A3.1 on page 79 for
details.
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