Okuma Alarm-D 4851 Door interlock
Code
None->The front door on the NC machine is open. In this situation, the machine cannot be manually started or operated with the loader axis reset.
1->The area sensor was shaded during automatic operation with the door open (for area sensor mounted types).
2->The area sensor was shaded in the LOCAL mode with the setup switch OFF and the door open (for area sensor mounted types).