Can't move motor after set_lim()

[prjemian]

Can't move a EpicsMotorLimitsMixin motor after calling set_lim() due to move target is out of limits. this is a blocker for the USAXS instrument now.

[prjemian]

It seems complicated. The call to set_lim() is working, setting the .LLM and .HLM fields in the motor record. But the ophyd object for motor.user_setpoint.limits (a tuple) is not updated. This tuple is set on initial connection with the motor record but is not updated from any code I can find.

Is it fair to just replace the tuple with the new values?

[prjemian]

class ChangeableLimitsMotor(APS_devices.EpicsMotorLimitsMixin, EpicsMotor):
    ""
m1 = ChangeableLimitsMotor('sky:m1', name='m1', labels=("motor",))

In [2]: m1.limits                                                                                                                           
Out[2]: (-32000.0, 32000.0)
In [4]: m1.user_setpoint.limits                                                                                                             
Out[4]: (-32000.0, 32000.0)
In [5]: m1.user_setpoint.limits??                                                                                                           
Type:        property
String form: <property object at 0x7fb31c267e90>
Source:     
# m1.user_setpoint.limits.fget
@property
def limits(self):
    '''The PV control limits (low, high), such that low <= value <= high'''
    # This overrides the base Signal limits
    return (self._metadata['lower_ctrl_limit'],
            self._metadata['upper_ctrl_limit'])

In [6]: m1.user_setpoint._metadata['lower_ctrl_limit']                                                                                      
Out[6]: -32000.0

Need to update the dictionary values for lower_ctrl_limit and upper_ctrl_limit.