A frequency or servo inverter (1, 1a) which is supplied in operation with an operating voltage, the inverter comprising: - a non-volatile memory for storing operating parameter values and/or program code of the frequency or servo inverter, - a control device which is coupled to the memory and controls an operation of the frequency or servo inverter depending on the stored operating parameter values and/or the stored program code as long as the frequency or servo inverter is supplied with the operating voltage, - a passive radio-frequency identification (RFID) transponder which is coupled to the memory and, regardless of whether the frequency or servo inverter is or is not supplied with the operating voltage, is designed to store operating parameter values transferred from an RFID read/write device and/or program code transferred from the RFID read/write device in the memory, and/or to transfer operating parameter values stored in the memory and/or program code stored in the memory to the RFID read/write device, and - a housing (7; 7a, 7b) into which the memory, the control device and the RFID transponder are integrated, - wherein the housing comprises a plastic housing part, wherein a symbol is provided on a side of the plastic housing part to be facing a user as a positioning aid for a read/write antenna of the RFID read/write device, and - wherein a transponder antenna is assigned to the transponder, wherein the transponder antenna is disposed below the symbol of the plastic housing part. - a non-volatile memory for storing operating parameter values and/or program code of the frequency or servo inverter, - a control device which is coupled to the memory and controls an operation of the frequency or servo inverter depending on the stored operating parameter values and/or the stored program code as long as the frequency or servo inverter is supplied with the operating voltage, - a passive radio-frequency identification (RFID) transponder which is coupled to the memory and, regardless of whether the frequency or servo inverter is or is not supplied with the operating voltage, is designed to store operating parameter values transferred from an RFID read/write device and/or program code transferred from the RFID read/write device in the memory, and/or to transfer operating parameter values stored in the memory and/or program code stored in the memory to the RFID read/write device, and - a housing (7; 7a, 7b) into which the memory, the control device and the RFID transponder are integrated, - wherein the housing comprises a plastic housing part, wherein a symbol is provided on a side of the plastic housing part to be facing a user as a positioning aid for a read/write antenna of the RFID read/write device, and - wherein a transponder antenna is assigned to the transponder, wherein the transponder antenna is disposed below the symbol of the plastic housing part. - wherein the housing comprises a plastic housing part, wherein a symbol is provided on a side of the plastic housing part to be facing a user as a positioning aid for a read/write antenna of the RFID read/write device, and - wherein a transponder antenna is assigned to the transponder, wherein the transponder antenna is disposed below the symbol of the plastic housing part.