Mazak PLC Alarm List. 200 THERMAL TRIP (EMERGENCY STOP) 201 BREAKER TRIP. 202 HYDRAULIC PRESSURE DOWN. 203 AIR PRESSURE DOWN. 204 SPINDLE CONTROLLER MALFUNCTION. 205 MILLING CONTROLLER MALFUNCTION. 206 OPEN FRONT DOOR (EMERGENCY STOP) 211 NOT OPERATED MCODE SIMULTA.