Emerson Site Manager, User Manual

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Configuration Tools Configuration • 77
Assuming that compaction is to be carried out
based on the Average and the established time period
is 1 hour, the following log values will be stored in the
database:
1. Log values that were recorded for the first hour will
be grouped together and compressed by Average.
That is: (10 + 20 + 10 + 20) / 4 = 15.
2. The equivalent value, which is 15, will be stored in
the database; old values (10, 20, 10, and 20) will be
purged.
3. For the next hour, log values will be compressed,
(40 + 5 + 15 + 35) / 4 = 23.75.
4. The compressed value (23.75) will be stored and old
values (40, 5, 15, and 35) will be purged.
If data compaction is to be carried out based on the
Minimum and the established time period is 45 min-
utes, the following data will result:
Regardless of the number of instances, the lowest
value recorded within the specified time period will
be stored in the database and the rest will be deleted.
For example, logs that were recorded for the first hour
(10, 20, and 10) comprise two instances of the mini-
mum log value, 10. Only one instance is recorded, the
other is deleted.
Same rules apply for compaction by Maximum,
except that the highest value is recorded:
7.2. Configuration Tools
7.2.1. List Power Builder
Create, view, edit, and delete lists with the List
Power Builder tool. Power Builder creates large-scale
lists by specifying a filter or matching criteria of items
to add or remove from a list instead of using each item
in the list individually; as a result, large lists can be
built quickly.
The List Power Builder window can be launched
from 3 different places in Site Manager: The Watch
Points screen, Schedule Manager page when schedul-
ing to Retrieve Logs By List, and from the Setpoint
Broadcast Scheduler configuration page (Target
Group Controller Group area).
The title in the top left will vary depending on the
type of lists that the power builder is currently work-
ing with. This can be Watch Points Lists or Target
April 1, 2010 12:45pm 20
April 1, 2010 01:00pm 40
April 1, 2010 01:15pm 5
April 1, 2010 01:30pm 15
April 1, 2010 01:45pm 35
April 1, 2010 02:00pm 10
Date and Time Reduced Value
April 1, 2010 12:00pm 15
April 1, 2010 01:00pm 23.75
Table 7-2 - Example of Compacting Log Data (Average)
Date and Time Reduced Value
April 1, 2010 12:00pm 10
April 1, 2010 12:45pm 5
April 1, 2010 01:30pm 10
Table 7-3 - Example of Compacting Log Data (Minimum)
Date and Time Recorded Value
Table 7-1 - Example of Compacting Log Data
Date and Time Reduced Value
April 1, 2010 12:00pm 20
April 1, 2010 12:45pm 45
April 1, 2010 01:30pm 35
Table 7-4 - Example of Compacting Log Data (Maximum)
Figure 7-10 - Power Builder Window