Configuring Alarm Historization, Mapping, and Shelving Priority Ranges

The Alarms and Events Configuration dialog lets you:

• Map alarm severities to priority ranges.

• Enable alarm shelving by priority range.

• Enable or disable historization of both alarm severities and event types. All alarms are historized by default.

  Default Alarm Mapping and Historization Values
  Severity	Description	Shelve	Historize	From Priority Range	To Priority Range
  1	Critical	N	Y	1	250
  2	High	N	Y	251	500
  3	Medium	Y	Y	501	750
  4	Low	Y	Y	751	999

Shelving, historization and priority ranges are configurable.

Mapping Alarm Severity to Priority

• Severity 1 starts at priority 1 by default. Severities can be mapped to priorities in ascending or descending order. For example, severity 1 can map to priority range 1–250 or it can map to priority range 999-751.

• Severity 4 ends at 999 by default, but 999 is not required to be the end-of-range number. For example, severity 4 can end at 900, leaving a priority range above 900 unmapped to any severity level.

• A priority outside the configured priority ranges will return severity 0, not mapped. Since the priority is unmapped, it cannot be historized.

  Note: Mapped alarm severities are not shared across galaxies in a multi-galaxy environment. Each galaxy in the environment has its own priority to severity mapping.