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AVEVA™ Plant SCADA

TABLE OF CONTENTS

Alarm States

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  • Last UpdatedJul 18, 2023
  • 2 minute read

Five alarm states can be represented by an alarm indicator:

  1. Normal — no alarms are active.

  2. On Unacknowledged — an active alarm has not been acknowledged.

  3. On Acknowledged — an active alarm has been acknowledged.

  4. Off Unacknowledged — the object has gone in and out of an alarm state without being acknowledged.

  5. Shelved — the alarm is currently shelved (which means it is disabled for a specified period of time).

These five state are demonstrated in the following table. The examples show the default appearance of emergency priority alarms in a project based on the Situational Awareness Starter Project. For other priorities, the color and flag shape would be different (see Use Alarm Indicators).

State

Example

Behavior

Normal

Embedded Image (65% Scaling) (LIVE)

  • No alarms are active.

On Unacknowledged

Embedded Image (65% Scaling) (LIVE)

  • The alarm border and flag are shown around the object.

  • The border and flag both flash between colored and white fill.

On Acknowledged

Embedded Image (65% Scaling) (LIVE)

  • The alarm border remains around the object, but is filled with half-intensity color.

  • The alarm flag retains its usual appearance.

  • There is no flashing for either element.

  • If the alarm condition clears, the object returns to normal state.

Off Unacknowledged

Embedded Image (65% Scaling) (LIVE)

  • The alarm border appears around the object filled with half-intensity color.

  • The alarm flag retains its usual appearance.

  • The alarm flag flashes.

  • The alarm border does not flash.

Shelved

Embedded Image (65% Scaling) (LIVE)

  • A white alarm border is shown with a generic alarm flag symbol; this is shown while alarms are shelved for the object (that is, temporarily disabled).

See Also

Create a Custom Flag for an Alarm Indicator

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