An electronic lock method for an elevator installation, comprising: detecting a first presence of a data carrier using a data-carrier reader of an electronic lock ; communicating an indicator for a first command using an output device of the electronic lock ; detecting a second presence of the data carrier using the data-carrier reader ; communicating an indicator for a second command using the output device ; detecting a confirmation of the data carrier with the data-carrier reader , - wherein the first and second presences of the data carrier result from the data carrier being held continuously in range of the data-carrier reader and wherein the confirmation of the data carrier comprises an absence of the data carrier , or - wherein the first and second presences of the data carrier result from the data carrier being moved out of range of the data-carrier reader and then moved into range of the data-carrier reader and wherein the confirmation of the data carrier comprises a continued presence of the data carrier ; as a result of detecting the confirmation of the data carrier , selecting the second command with a computer-based control unit of the electronic lock , the first command being different from the second command, wherein the second command comprises an elevator installation command; and sending, by the computer-based control unit , the elevator installation command to an elevator system for execution. detecting a first presence of a data carrier using a data-carrier reader of an electronic lock ; communicating an indicator for a first command using an output device of the electronic lock ; detecting a second presence of the data carrier using the data-carrier reader ; communicating an indicator for a second command using the output device ; detecting a confirmation of the data carrier with the data-carrier reader , - wherein the first and second presences of the data carrier result from the data carrier being held continuously in range of the data-carrier reader and wherein the confirmation of the data carrier comprises an absence of the data carrier , or - wherein the first and second presences of the data carrier result from the data carrier being moved out of range of the data-carrier reader and then moved into range of the data-carrier reader and wherein the confirmation of the data carrier comprises a continued presence of the data carrier ; - wherein the first and second presences of the data carrier result from the data carrier being held continuously in range of the data-carrier reader and wherein the confirmation of the data carrier comprises an absence of the data carrier , or - wherein the first and second presences of the data carrier result from the data carrier being moved out of range of the data-carrier reader and then moved into range of the data-carrier reader and wherein the confirmation of the data carrier comprises a continued presence of the data carrier ; as a result of detecting the confirmation of the data carrier , selecting the second command with a computer-based control unit of the electronic lock , the first command being different from the second command, wherein the second command comprises an elevator installation command; and sending, by the computer-based control unit , the elevator installation command to an elevator system for execution. <EOS>