def speed_sp(self):
        """
        Writing sets the target speed in tacho counts per second used for all `run-*`
        commands except `run-direct`. Reading returns the current value. A negative
        value causes the motor to rotate in reverse with the exception of `run-to-*-pos`
        commands where the sign is ignored. Use the `count_per_rot` attribute to convert
        RPM or deg/sec to tacho counts per second. Use the `count_per_m` attribute to
        convert m/s to tacho counts per second.
        """
        self._speed_sp, value = self.get_attr_int(self._speed_sp, 'speed_sp')
        return value