# EHMI

The EHMI is a tool accessory. It is installed on the tool and connected to the tool accessory bus. It has a graphical display, three function buttons, and optionally a scanner. The display is a subset of the controller GUI with the possibility to select tightening programs, batch sequences, and to view results from tightenings. The interaction with the controller is through function buttons.

In the EHMI configuration it is possible to decide if the function buttons are On or Off.

EHMI buttons
Parameter | Description
--- | ---
Enable function buttons | On = The buttons have full functionality to configure settings within the visible menus. Off = The function buttons can only be used to acknowledge a necessary dialog on the EHMI.