---
title: "Boss’nX alarm history: search, filter and read an alarm"
description: "Find an alarm in Boss’nX by component, severity, status or period, and read its row: reason, value, start, end and acknowledgment state."
canonical: https://wiki.can-nx.com/en/guides/boss-alarms-consult/
language: en
product: Boss’nX
audience:
  - utilisateur
  - administrateur
  - installateur
context: "Boss’nX: Alarms page of a supervision or Aggregated alarms of the hypervision"
---

# Boss’nX alarm history: search, filter and read an alarm

Context: Boss’nX: Alarms page of a supervision or Aggregated alarms of the hypervision

The Boss’nX **Alarm History** page lists the alarms of a supervision, or of several projects in hypervision, with their severity, component, reason, value and acknowledgment state. Find an alarm by component, period or status, then read its row to understand what triggered it.

For the everyday user, the administrator and the installer authorized to view alarms. Acting on an alarm requires additional rights: see [acknowledgment](https://wiki.can-nx.com/en/guides/boss-alarms-acknowledge/), [standby](https://wiki.can-nx.com/en/guides/boss-alarms-standby/) and [deleting entries](https://wiki.can-nx.com/en/guides/boss-alarms-delete/).

## Open the alarm history

1. In the supervision of the building concerned, click **Alarms** in the navigation bar: at the top of the screen, or in the bottom bar on a tablet or phone. If the entry does not appear there, open **Menu → Alarms**. See [navigation in Boss’nX](https://wiki.can-nx.com/en/guides/boss-navigation/).
2. Check **Alarm History** and the supervision’s name in the header.
3. Choose the **Ongoing**, **Ended** or **Standby** tab. Active alarms whose datapoint is in standby are placed in this last tab; inactive alarms remain in **Ended**.

The tab counters cover the accessible alarms before the search, period and severity filters: a non-zero counter may therefore go with an empty filtered list. The badge on the **Alarms** entry shows new alarms or, failing that, the number of ongoing unacknowledged alarms; opening the page does not replace [acknowledging an alarm](https://wiki.can-nx.com/en/guides/boss-alarms-acknowledge/).

### In hypervision

Use **Aggregated alarms**. The **Project** filter replaces **Floor** and a **Project** column is added. The standby tab and its actions do not appear there: standby is viewed and set from the building’s supervision.

From the aggregated dashboard, clicking **Technical alarms** also opens this history, as described in [the guide to the alarm summary in hypervision](https://wiki.can-nx.com/en/guides/boss-hypervision-alarms/).

## Search and filter alarms

1. Type a component name or a few words of its message in **Search by component or message...**.
2. Under **Severity**, select **High**, **Medium** or **Low**. These three labels remain in English in the French interface.
3. If needed, select one or more floors, or projects in the aggregated view.
4. Under **Status**, choose **Active** or **Inactive**. A status incompatible with the selected tab gives an empty list.
5. Under **Acknowledgment**, choose **Yes** or **No**.
6. To limit the period, fill in the **Start** and/or **End** date and time. Both bounds apply to the start of the alarm, in the browser’s local time: **End** does not filter the end time of an inactive alarm.

Several choices within the same family are accepted, and the families combine. Click a selected chip again to remove it. **Reset**, next to the dates, only empties the two bounds: also empty the search and remove the other chips to get the unfiltered list back.

To include a whole day, do not leave its **End** bound at midnight at the start of the day, and check the time entered. The bounds are inclusive; an end earlier than the start may hide all the rows.

Display times follow the browser; the export uses another format, explained in [the CSV guide](https://wiki.can-nx.com/en/guides/boss-alarms-export/).

## Read an alarm row

| Column or marker | Meaning |
| --- | --- |
| **Severity level** | Severity **High**, **Medium** or **Low**. |
| **Component** | Name associated with the alarm. When it appears as a blue link, click it to open its detail. In the aggregated view, the link opens the corresponding supervision. |
| **Message**, **Reason** | Message and trigger reason. On a computer, hover over truncated text to read it in full. |
| **Value** | A green dot next to a numeric value indicates a live value. Without this marker, the row may show the trigger value. A dash does not mean zero. |
| **Start**, **Status** | Date and time of the trigger, then **Active** or **Inactive** state. |
| **End**, **Cleared value** | Additional information in the **Ended** tab. A dash indicates information that is not displayed. |
| **Acknowledged** | **Yes** or **No**, regardless of the active or inactive status. |
| **Config modified** | The alarm’s configuration has changed since it was triggered, as the tooltip indicates. |

**Low threshold**, **High threshold** or **Threshold** may be accompanied by their limits. **No signal** may indicate a delay, for example more than sixty seconds. **Comparison**, **Values** and **Boolean** describe other conditions. These reasons describe the condition met; they are not enough to determine remotely the actual cause of an incident.

By default, the most recent starts are shown first. To sort, click **Severity level**, **Floor**, **Reason**, **Start**, **Status** or **Acknowledged**, as well as **Project** or **End** when they are present; a second click reverses the direction. For another sort order, use [the CSV export](https://wiki.can-nx.com/en/guides/boss-alarms-export/).

## Troubleshooting

| Symptom or message | Check and next step |
| --- | --- |
| Empty list or alarm not found | First check the building or the project, then the tab. Remove the search, the chips and the dates. |
| **Alarms** entry or expected information missing | The account’s visibility rules may limit the accessible alarms: have your rights checked. |
| **Aggregated alarms cannot be filtered for your role — hidden for safety.** | View the supervision of the building you are authorized to access. Alarms may exist despite this hidden view. |
| **Alarms unavailable**, in the aggregated view | Use **Retry** if the button is offered. |

If the expected list remains inaccessible, if the sorting does not give a reliable result or if you cannot interpret an alarm, contact support@can-nx.com with the product, the building, the message and the filters already checked.

French labels: **Alarmes**, **Alarmes agrégées**, **Historique des Alarmes**, **En cours**, **Terminées**, **En standby**, **Rechercher par composant ou message...**, **Période**, **Début**, **Fin**, **Réinitialiser**, **Acquittement**, **Réessayer**.