The D8 Tachograph settings only applies to the Tachograph D port 8 pin where some data is sent from the tachograph and we use it to detect the driver card changes.

-If the terminal is moved for example from a Siemens VDO to a Stonerdige tachograph then the only thing that will happen is that the terminal won't send the driver card changes instantly.

-Do not ever set the D8 send data to Send all event changes, because then there will be sent a message to the server on every state change of the tachograph and this is not handled on the server side.