The analog alarm extension adds the alarming capability for
attributes with real values, such as the Present Value of an Analog Input Object. This
extension detects an alarm based on up to four limits and can be configured to report that
alarm. It also sets the Alarm State attribute of the object to which it is added. The analog
alarm extension is also used with the Graphic Setting Preferences, which are used to establish
color choices for alarm conditions in graphics and throughout
Metasys UI.
Note: At Release 12.0, you can set the alarm and graphic preferences in Site Settings.
For example, you can configure the analog alarm extension to issue an alarm if the temperature in a room falls below 60˚F (15.6˚C).