A method for carrying out a robot application includes controlling the robot to: carry out a transfer movement in a set-up operation, in which the robot speed reaches a set-up transfer movement top speed; carry out a process movement in the set-up operation, in which the robot speed reaches a set-up process movement top speed; carry out the transfer movement in an automatic operation, in which the robot speed reaches an automatic transfer movement top speed; and carry out the process movement in the automatic operation, in which the robot speed reaches an automatic process movement top speed.

For controlling a robot in a safe way, a highest voltage required for a desired robot movement is calculated. A voltage level in a DC-bus is set on the basis of the highest voltage, and current is supplied to a motor at a robot axis from the DC-bus. By limiting the voltage level in the DC-bus to correspond to an actual need for a desired robot movement at each instant unnecessary fast robot movements are prevented even in the event that an inverter controlling motor currents would by mistake attempt to drive the motor faster than desired by the operator.