def limit_acceleration(self, accel):
        """Sets the acceleration limit on the Grizzly. The max value is
        143. Units are change in pwm per millisecond. Internally, the pwm is in
        the range [-0x7f, 0x7f] or [-127, 127]. So in one millisecond the maximum
        acceleration limit possible is 127 - -127 = 142. The internal default
        value is 4*.
        *Note: subject to change."""
        if accel >= 143:
            raise ValueError("Acceleration limit cannot exceed 143. You provided: %s" % str(accel))
        if accel <= 0:
            raise ValueError("Acceleration limit must be positive. You provided: %s" % str(accel))
        self._set_as_int(Addr.AccelLimit, accel)