# Acknowledgement-required and self-clearing alarms

## Overview

### What are cleared alarms?

An alarm “clears” when the criteria for an alarm are no longer met and it is not an alarm that requires acknowledgment. 

A cleared alarm no longer appears in the alarm overview. However, a cleared alarm always appears in the [↗ alarm history](https://docs.buildings.ability.abb/collection/english-v14/documentation/alarms-rules-and-escalations/alarms/..#alarm-historie). 

Alarms CANNOT be deleted from the alarm history.

### What are alarms requiring acknowledgment?

Alarms requiring acknowledgment remain in the [↗ alarm overview](https://docs.buildings.ability.abb/collection/english-v14/documentation/alarms-rules-and-escalations/alarms/..#die-alarm-uebersicht)until they have been acknowledged by a user. 

After an alarm requiring acknowledgment has been acknowledged, the alarm is moved to the [↗ alarm history ](https://docs.buildings.ability.abb/collection/english-v14/documentation/alarms-rules-and-escalations/alarms/..#alarm-historie). 

Whether an alarm requires acknowledgment is configured in the [↗ rule](https://docs.buildings.ability.abb/collection/english-v14/documentation/alarms-rules-and-escalations/rules) that triggers the respective alarm. Alarms requiring acknowledgment are highlighted with a **\[B]** marker.

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

A rule is created that triggers an alarm when the temperature drops below 20 degrees. The rule is set as *does not require acknowledgment* .

* The temperature drops below 20 degrees\
  ▷ An alarm is triggered\
  ▷ The alarm appears in the alarm overview
* The temperature rises above 20 degrees again\
  ▷ The alarm “clears”\
  ▷ 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 when the temperature drops below 20 degrees. The rule is set as *requires acknowledgment* .

* The temperature drops below 20 degrees\
  ▷ An alarm is triggered\
  ▷ The alarm appears in the alarm overview\
  ▷ The alarm is marked as requiring acknowledgment **\[C]** marked
* The temperature rises above 20 degrees again\
  ▷ The alarm does not “clear”\
  ▷ 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 %}

<figure><img src="https://content.gitbook.com/content/Nyvwhz1kEMXcHf4HLuZ8/blobs/m6CnbkoenfJGOwRErgF0/Docs_Alarme%201.png" alt=""><figcaption></figcaption></figure>

## Acknowledge an alarm

1. Go to the [↗ alarm overview ](https://docs.buildings.ability.abb/collection/english-v14/documentation/alarms-rules-and-escalations/alarms/..#die-alarm-uebersicht)on
2. Click on **\[M]** \
   ▷ The menu **\[M1]** opens
3. Click on **\[M6]** \
   for the desired alarm\
   ▷ The alarm is acknowledged

## Acknowledge an alarm with comment

1. Go to the [↗ alarm overview](https://docs.buildings.ability.abb/collection/english-v14/documentation/alarms-rules-and-escalations/alarms/..#die-alarm-uebersicht) on
2. Click on **\[M]** \
   ▷ 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, instead of **\[M7]** the “Logbook” option appears. The logbook shows the comment that was entered when an alarm was acknowledged with a comment.

##


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