> For the complete documentation index, see [llms.txt](https://docs.buildings.ability.abb/collection/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.buildings.ability.abb/collection/english-v14/connectivity-as-a-service/connect-devices-with-abb-buildingpro/connect-devices-via-modbus/create-a-new-modbus-connection.md).

# Create a new Modbus connection

## Steps to set up a Modbus connection

<div data-full-width="true"><figure><img src="/files/52fdb9303e35b9115110fd5b653f213827253413" alt=""><figcaption></figcaption></figure></div>

1. Click in the left sidebar on **Connection \[A]**.
2. **Select the "Modbus" tab \[B]**\
   ▷ The list of all existing Modbus connections is displayed.\
   ◈ This list shows all already configured Modbus connections, if any.
3. **Click on "+Connection" \[C]**\
   ▷ A new window for creating a connection opens.

<figure><img src="/files/ee3431b5e85c50e1a176cfc3f2d2aba685eac8ee" alt=""><figcaption></figcaption></figure>

1. **Configure the connection**\
   Enter the following information:
   * **Name**: Assign a name for the Modbus connection.
   * **Schema**: Select the appropriate schema from the dropdown menu.
   * **Address**: Enter the IP address of the Modbus server (e.g. *194.87.82.160*).
   * **Port**: Enter the server's port (default: **502**).
   * **Unit**: Enter the *Slave ID* of the device (digits only, e.g. *123*).
2. **Save the configuration**\
   Click on **Save**, to create the connection.\
   ▷ The Modbus connection is saved and displayed in the list.


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