Abstract: In one embodiment, a plug-cable unit includes a plug connector which is equipped to receive a coding plug. A cable is used for connecting to a functional unit to be controlled, in particular of an electromechanically adjustable piece of furniture. A plug module is used for connecting to a control device of the piece of furniture. In one embodiment, a coding plug includes at least two ports for connecting to related contacts of a plug connector of a plug-cable unit, and at least one electronic component having at least one parameter of a functional unit.