# Acknowledgment Obligation and Dismissed Alarms

## Overview

### What are dismissed alarms?

An alarm is "dismissed" when the criteria for an alarm are no longer met and it is not an alarm subject to acknowledgment.

A dismissed alarm no longer appears in the Alarm Overview. However, a dismissed alarm always appears in the [↗ Alarm History](https://docs.buildings.ability.abb/collection/platform/alert-center/alarms/..#alarm-history).

Alarms CANNOT be deleted from the Alarm History.

### What are alarms subject to acknowledgment?

Alarms subject to acknowledgment appear in the [↗ Alarm Overview](https://docs.buildings.ability.abb/collection/platform/live-cockpit/widgets/predefined-widgets/alarm-overview) until they are acknowledged by a user.

After an alarm subject to acknowledgment has been acknowledged, the alarm is moved to the [↗ Alarm History](https://docs.buildings.ability.abb/collection/platform/alert-center/alarms/..#alarm-history).

Whether an alarm is subject to acknowledgment is configured in the [↗ rule](https://docs.buildings.ability.abb/collection/platform/alarms-rules-and-escalations/rules) that triggers the respective alarm. Alarms subject to acknowledgment are highlighted by a marker **\[B]**.

{% hint style="info" %}
**Example 1**

A rule is created that triggers an alarm as soon as the temperature drops below 20 °C. The rule is marked as *not subject to acknowledgment*.

* The temperature drops below 20 °C

  ▷ An alarm is triggered

  ▷ The alarm appears in the Alarm Overview
* The temperature rises back above 20 °C

  ▷ The alarm "Dismisses"

  ▷ The alarm no longer appears in the Alarm Overview

  ▷ The alarm appears in the Alarm History

**Example 2**

A rule is created that triggers an alarm as soon as the temperature drops below 20 °C. The rule is marked as *subject to acknowledgment*.

* The temperature drops below 20 °C

  ▷ An alarm is triggered

  ▷ The alarm appears in the Alarm Overview

  ▷ The alarm is marked as subject to acknowledgment **\[C]**
* The temperature rises back above 20 °C

  ▷ The alarm does not "Dismiss"

  ▷ The alarm remains visible in the Alarm Overview
* The alarm is acknowledged

  ▷ The alarm no longer appears in the Alarm Overview

  ▷ The alarm appears in the Alarm History
  {% endhint %}

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## Acknowledge an Alarm

1. Open the [↗ Alarm Overview](https://docs.buildings.ability.abb/collection/platform/live-cockpit/widgets/predefined-widgets/alarm-overview)
2. Click on **\[M]** for the desired alarm

   ▷ The menu **\[M1]** opens
3. Click on **\[M6]**

   ▷ The alarm is acknowledged

## Acknowledge an Alarm with a Comment

1. Open the [↗ Alarm Overview](https://docs.buildings.ability.abb/collection/platform/live-cockpit/widgets/predefined-widgets/alarm-overview)
2. Click on **\[M]** for the desired alarm

   ▷ The menu **\[M1]** opens
3. Click on **\[M7]**
4. Enter a comment and click OK.

### Logbook

If an alarm has already been acknowledged with a comment, the "Logbook" option appears instead of **\[M7]**. The comment that was entered when an alarm was acknowledged with a comment is displayed in the logbook.


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