Patent ID: 7400949

Claim:
A device for adjusting at least one parameter, the device comprising: at least one selector which is capable of being actuated by an operator; at least one coder which is driven in rotation by said selector when the latter is actuated, and which then emits a signal representative of that rotation; and at least one arithmetic unit which receives the signal emitted by the coder, formats it, makes a computation to deduce the a selected value therefrom and is capable of transmitting the selected value thus computed, wherein it also comprises: a first detection means which is capable of detecting an actuation of said selector; a second detection means which is capable of detecting the emission of a signal indicating a change of the selected value; and a first comparison means which is linked to said first and second detection means and which deduces a first signal change detection malfunction from the information received from said first and second detection means when only one of said first and second detection means has made a detection.