Timeline Chart region

The Timeline Chart region is the main display in Alarm Mosaic and uses icons to graphically present up to 500 alarms on a timeline.

The alarms are represented by different types of icons and categorized based on alarm priorities and states. Each icon represents the following information:

Alarm priority - Critical, Warning, Advisory, and so on
Alarm state - Active Acknowledged, Active Unacknowledged, or Inactive Unacknowledged
Selection - The action the user has performed on an alarm such as Acknowledge Alarm

Alarms icons are displayed in vertical columns called containers. The number of containers visible on the timeline is dependent on the space provided by the window size and other panels within Alarm Mosaic. The amount of time represented by each container is called the container time interval. The default container time interval is 1m (one minute) but can be changed by the user in the toolbar menu. Changing the container time interval either increases or decreases the total time span displayed on the timeline; the width of the containers remains constant.

Alarm icons are presented in time order using stacking, with the newest alarms appearing at the top regardless of their priorities. If there is not enough vertical space available for all of the alarms, an overflow icon [] is displayed at the top of the container with a numerical value indicating the number of alarms off the top of the container stack. Double-clicking the icon decreases the container time interval and can redistribute the alarms in columns of lesser time.

A Control Action events icon [] is also displayed at the top of the container showing the number of actions that occurred during that container interval. The events are redistributed into the appropriate container(s) when the container time interval is changed. Clicking the event count icon highlights those events in the Control Actions region and brings at least one row to the top.

By default, the timeline's right margin is set as the current time. It is possible to view time spans where the right margin represents an earlier time by using the scroll bar. The >| icon in the toolbar resets the right margin of the timeline to the current time. The total time span displayed in the timeline is a function of the container time interval (1 minute by default) and the amount of horizontal space available in the timeline pane to present containers.

Older Alarms and Newer Alarms provide a count of the active alarms that fall outside the presented time span range. The count displays the:

icon.
number of alarms for each priority.
number of unacknowledged alarms [in square braces] for each priority.
total number of alarms and unacknowledged alarms for all priorities.

The following actions can be performed in the Timeline Chart region:

Select a single alarm.
The alarm is highlighted in the Alarm List.
Select multiple alarms using the Ctrl key, or optionally, hold down the left mouse button and drag on the chart to group the alarms you wish to include.
Alarms within the rectangle selection boundary will be highlighted in both the Timeline Chart & Alarm List.
Use the right-click context menu on a selected alarm to perform the following actions:
- Acknowledge the alarm.
- Open the alarm's control display or faceplate.
- Open Alarm Help for that alarm.
- Open the Hardware Conditions Summary dialog.

Note

When multiple alarms are selected, Acknowledge Alarm(s) is the only available menu action.