Rugby,
Unfortunately, you are not going to be able to access the hardware status of the MID through the connection to the board. With this setup, the enable switch is wired internally to the drive, and the status is not passed to the board. If you are desperate for this feature, you could possibly do some external wiring of the actual switch on the front of the drive to one of the trigger inputs on the back of the drive, and monitor that trigger line in software, but this may void your waranty.
Best Regards,
Chris D
I hope this helps!