Method for safely parameterizing an electrical device

A method for safely parameterizing an electrical device, comprising:

• transmitting a parameter input by a user into a control unit to the electrical device, the parameter being stored at the electrical device with write protection;
• returning the stored parameter to the control unit by transmitting the stored parameter back to the control unit from the electrical device together with a name of the stored parameter, a code generated by the device and in a data format which cannot be processed by the control unit;
• displaying the stored parameter, the name of the stored parameter and the code to the user on the control unit;
• confirming, by the user, the stored parameter displayed on the control unit;
• transmitting a confirmation to the electrical device;
• and
• checking the confirmation in the electrical device to determine whether the confirmation contains the code;
• wherein the code is generated with a current time stamp, and wherein the time stamp is included in the confirmation and is checked in the electrical device to determine whether the confirmation is within a given time-window.