On Mori Seiki machines (typically using MAPPS interfaces or Fanuc controls), EX alarms refer to External (PLC) Alarms. These are generated by the machine tool builder rather than the CNC control itself, usually relating to peripheral hardware like the chip conveyor, tool changer, or coolant system. Common Mori Seiki EX Alarm Categories
Alarm: 9001 / EMERGENCY STOP
Takeaway: Always use the Mori Seiki EX alarm list not just as a code lookup, but as a symptom tree. mori seiki ex alarm list
Symptoms: Cannot start spindle, cannot run program. Troubleshooting: On Mori Seiki machines (typically using MAPPS interfaces