---
title: "Edit datapoints and write setpoints"
url: "https://help.aedifion.io/en/article/edit-datapoints-and-write-setpoints"
language: "en"
last_updated: "2026-10-21T15:21:45.568Z"
---

# Edit datapoints and write setpoints

## Edit datapoints

By clicking on the three menu items in the datapoint lists, datapoints can be edited. The description can be added or edited if none is available in the building automation. Additionally, tags can be edited.

![frontend-project-overview](https://docs.aedifion.io/en/products/io/images/frontend/tagging-functionality.png)

#### **Figure 1:** Overview of existing tags

1.  Click on the three menu items and select *"Edit tags"*
2.  Add more key-value pairs
3.  1.  Below the tag list, select from existing values and keys or add your own free text as you wish
    2.  Confirm your extension by clicking on *"+"*
    3.  The new tag has been saved
4.  Delete manually stored tags (source user) by clicking on the trash can icon

Our system evaluates the tags set to define a system-wide unit. By manually setting the tag *units* with the corresponding unit of the datapoint, this information is available to our system. As described in our API guide, there is a hierarchy of tags from which the [system-wide unified tags](https://docs.aedifion.io/en/developers/http-api/guides-and-tutorials/favorites-tagging-renaming/#system-tags) are derived. The units set manually by the user are always preferred. By defining a single unit for a datapoint from the existing tags, conversions to other unit systems are now possible.

## Write setpoints

Setpoints can be written directly to data points in the automation system, within predefined limits and priorities. If a data point has a BACnet priority array, priorities 8 to 16 can be written, and the current priority array can be queried. The history of all written setpoints can be displayed.

-   To write a setpoint, select "Write setpoint" from the three-dot menu of a data point.
-   ![](https://cdn-assets.productfruits.com/6699af2c-dec2-4086-a238-c7145ff2fb4a)There, writability can be activated and limits defined.

![](https://cdn-assets.productfruits.com/c267e0b3-6b34-44ee-afc3-5535422e175d)

If writability is activated on the platform, the data point receives the tag "Writable" and can be displayed using the filter function.

![](https://cdn-assets.productfruits.com/fc6e50de-ddd1-406d-a149-27262f4c8526)

-   Enter the value in the New setpoint field, select a priority and click on *"Write".*

![](https://cdn-assets.productfruits.com/1c42ea29-a586-4ad5-ab40-055147e2d07e)

-   Extend the "Priority array" field to release values on priorities 8 to 16.
-   Click on *"History"* to view the history.