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Figure 23. Alarm history
The alarm history screen displays the history of alarms
recorded by the primary microprocessor (See
23, p.
45).
Sort History Items
The alarm history list can be sorted by any column in
ascending or descending order by tapping the
corresponding column heading. The triangle that
appears next to the heading indicates which column is
being sorted and the direction of sorting.
Sorting is applied to the alarm time column in
ascending order by default, which is indicated when
the triangle is pointing up. Ascending order for the
alarm time column requires that earlier records appear
on the list first. For all other columns, alphabetical
sorting applies.
Duration
Allows the selection of the time period for which the
alarm history is displayed. Once the selection is made
from the drop-down menu, pressing the REFRESH
button updates the list and the 'From' and 'To'
timestamps will update accordingly.
Time
This is the time stamp that is displayed when the alarm
state changes.
Status
This is the same as "Status" for active alarms.
ARTC-SVX005B-EN
State
Figure
This is the same as 'State' for active alarms.
Trend Screen
When on the primary module screen, pressing the
trend button displays the trend screen. There are two
trend screens: cooling trend screen and heating trend
screen.
Since only system variables are tracked, the trend
screens apply to the primary module only. Both the
cooling trend and heating trend screens display three
trends:
•
Chilled water inlet and outlet temperatures.
•
Hot water inlet and outlet temperatures.
•
Cooling and heating demand.
Cooling and Heating Demand
Trends can be viewed in real time as well as for the
previous seven days. Each variable is trended every
three seconds. Trending data is stored in internal
memory. See
Both the cooling trend and heating trend screens have
similar but independently managed controls and
trends for viewing.
O O p p e e r r a a t t i i n n g g P P r r o o c c e e d d u u r r e e s s
Figure 24, p.
46.
45
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