Exemplary embodiments are disclosed of radio-frequency identification (RFID) systems and methods for changing operator control unit (OCU) configurations (e.g., operating frequency, address, operational configuration, etc.). In an exemplary embodiment, a system includes at least one or more radio-frequency identification (RFID) tags associated with at least one or more machines. The at least one or more RFID tags are readable by an RFID reader when the RFID reader and the at least one or more RFID tags are operationally proximate. The at least one or more RFID tags include data useable for changing the configuration of the OCU such that the OCU is configured to be operable with the at least one or more machines.