# Configuring the Tool Accessory Bus

The optional tool accessories can be factory installed or be installed at a later stage. The accessories are connected to a Tool Accessory Bus. They have small displays as outputs, and buttons as inputs. The functionality is configured from the controller GUI, the web GUI or the ToolsTalk 2 GUI.

The hardware installation of a tool accessory is described in the accessory documentation and in the tool's specific documentation. The configuration parameters that can be accessed from ToolsTalk 2 are described in this documentation.

1. Select a controller in the Plant structure workspace .

2. Select the Configurations icon in the top-side menu bar in the workspace area.

   The workspace area displays a list of configurations.

3. Double-click on a configuration row that has Tool configuration in the Type column.

   Alternatively, select Add to create a new tool configuration.

4. Double-click on a configuration to open the selected configuration menu.

   The Accessory bus menu shows the possible accessories that can be configured.

5. Double-click on the selected type to open a shortcut window for the configuration.

Accessory bus configurations
Type | Description
--- | ---
ST selector | A small display and buttons; used to select tasks or programs according to the configuration.
TLS tag | Tool Location System tag; used to provide output signaling to the operator.
EHMI | A small display and buttons; used to select tasks or programs according to the configuration.
Scanner | Installed on the tool and connected to the tool accessory bus. It has one function button that activates the Scanner.

In this Section

- Configuring the Tool Location System Tag (TLS)
- Configuring the Extended Human Machine Interface (EHMI)
- Configuring the ST Selector