Mori Seiki, a renowned Japanese manufacturer of computer numerical control (CNC) machines, has been a stalwart in the industry for decades. Their EX series of machining centers, known for their precision and reliability, are widely used in various sectors, including aerospace, automotive, and general machinery. However, like any sophisticated machinery, Mori Seiki EX machines can encounter issues that may lead to alarm notifications. These alarms are crucial as they indicate specific problems that need immediate attention to prevent damage to the machine and ensure operational safety.
These alarms are proprietary. While you can find general Fanuc Alarms online, EX codes are found only in or at the back of the Ladder Diagram Manuals . They represent the unique engineering philosophy of Mori Seiki: a machine that is self-aware enough to stop itself before a human error becomes a mechanical tragedy. Mori Seiki EX Alarm Code List | PDF | Switch - Scribd
: The screen flashes EX4002 (OPEN THE DOOR THEN CLOSE) . mori seiki ex alarm list
If you operate or maintain a CNC machine from (now part of DMG Mori ), you have likely encountered the dreaded “EX” alarm on the controller. Unlike standard NC alarms (which typically start with a number like 100 or 200), EX alarms are specific to the machine builder’s unique PLC (Programmable Logic Controller) logic. They act as the machine’s way of telling you that a peripheral condition is not met—think hydraulic pressure, lube levels, door locks, or tool changer positioning.
| EX Code | Message | Solution | | --- | --- | --- | | | Operation Denied (Level 1) | Log in as operator using password. | | EX2005 | Program Edit Lock | Turn key switch on main panel to "Edit" (Pos 1). | | EX2010 | APC Active | Automatic Pallet Change in progress. Wait for cycle to finish. Cannot reset while APC arm is moving. | | EX2999 | Watchdog Timer Error | PLC scan time exceeded. Restart control. If persistent, reload PMC parameters via I/O. | Mori Seiki, a renowned Japanese manufacturer of computer
– Low voltage in the memory backup battery; replace immediately to avoid data loss. EX2568: HYDRAULIC UNIT ALARM
– The interlock key was turned to the "release" position during an automatic cycle. These alarms are crucial as they indicate specific
For a CNC technician, the EX alarm list is a map. When a machine "hangs" without moving, the technician doesn't look at the motor first; they check the Mori Seiki EX Alarm Codes Overview . : A machine stops mid-cycle.
Mori Seiki EX Alarm Codes Overview | PDF | Lubricant - Scribd
| EX Alarm Code | Message | Cause | Common Fix | | --- | --- | --- | --- | | | Low Lubrication Level | Oil level switch in central lubrication tank is open. | Refill with VG 68 or specified oil. If level is fine, check float sensor continuity. | | EX1011 | Lube Pressure Low | Pressure switch did not close within 30 seconds of pump start. | Clean lubrication filter; check for broken oil lines on way surfaces. | | EX1012 | Coolant Level Low | Float switch in coolant tank is open. | Add coolant/water concentrate. Clean debris off float. | | EX1013 | Chip Conveyor Overload | Thermal overload relay on chip conveyor motor tripped. | Clear jammed chips; press reset on the thermal overload (usually in electrical cabinet). |