Motor driving apparatus

A motor driving apparatus for driving a motor while controlling the motor based on an external command signal from an external device, the motor driving apparatus comprising:

• an external command processor for receiving the external command signal and outputting a motor control command from the external command signal based on an external command processing program;
• a motor controller for receiving the motor control command and controlling an operation of the motor according to the motor control command based on a motor control program;
• a program storage being a nonvolatile semiconductor memory for storing the external command processing program and the motor control program in advance as storage program data, wherein the external command processing program is stored in a rewritable external command processing program storage area and the motor control program is stored in a non-rewritable motor control program storage area;
• a program rewriting unit for rewriting the storage program data stored in the rewritable external command processing program storage area;
• and
• a rewriting data input terminal for receiving program rewriting data to be rewritten by the program rewriting unit,
• wherein the program rewriting unit rewrites only the external command processing program stored in the program storage based on the program rewriting data received from the rewriting data input terminal,
• wherein the program rewriting unit rewrites the external command processing program corresponded to different various external devices from which the external command processing program is received via the rewriting data input terminal, and
• wherein the motor is controlled by the motor control command that the external command processor generates from the external command signal based on the rewritten external command processing program.