List: Mori Seiki Ex Alarm

The EX Alarm List is typically organized numerically, though the exact range can vary by machine series (e.g., DuraVertical, NL, NV, or MT series). The numbers themselves often carry implicit meaning:

A well-structured EX list will also provide a probable cause and recommended action for each code. For instance, an entry might read:

EX2042 – LOW AIR PRESSURE Cause: Main air supply below 0.4 MPa. Action: Check shop air supply; inspect filter regulator unit for leaks or blockage.

This actionable clarity transforms the alarm from a cryptic error into a guided troubleshooting step.

Alarm: 5005 / PLC COMMUNICATION ERROR

Alarm: 2005 / ABSOLUTE ENCODER ERROR

Symptoms: No axis movement, E-stop button not pressed but machine shows safety open. Troubleshooting:

If EX1011 LUBRICATION PRESSURE LOW happens every Monday morning, the lube pump may be losing prime over weekends. Install a check valve or run a lubrication cycle (M70) on startup.

Mori Seiki EX Alarms are machine-specific (external) errors typically generated by the machine's PLC rather than the core CNC system (like Fanuc) . These alarms generally relate to physical interlocks, hardware sensors, and peripheral operations like the turret, tailstock, or lubrication system . Common EX Alarm Categories

Below are frequently encountered Mori Seiki EX alarms and their general causes: Interlocks and Safety

EX0024 (CHUCK UNCLAMPED): Cycle start attempted while the chuck was not clamped .

EX0026 (DOOR NOT CLOSED): Attempted to run the machine while the protective door was open .

EX0069 (DOOR LOCK CHECK TIME OVER): The door lock confirmation signal was not received within the expected time . Turret and Tooling

EX0207 (T-CODE NOT COMMANDED): Tool call rejected, often due to an error in the tool table or pot mapping .

EX0312 (NEED TURRET ZERO-RETURN): The turret is not indexed to the correct starting position .

EX0356/0357 (TURRET INDEX TIME OVER): Turret failed to complete indexing within the specified time, possibly due to a mechanical jam or faulty proximity switch . Fluid and Pressure Systems

EX0551 (ELEC. CONTROL UNIT OVERHEATING): Abnormal temperature rise in the electrical cabinet; check filters and cooling fans .

EX0560 (AIR PRESSURE DROP): Pneumatic pressure has fallen below the safe operating threshold .

EX0561 (OIL PRESSURE LOW): Decrease in hydraulic pressure; often tied to pump or piping issues .

EX0570 (INSUFFICIENT LUBRICATION OIL): Way lube level is low and needs to be refilled . Spindle and Drive

EX0451 (SPINDLE DRIVE UNIT ALARM): General fault in the spindle drive; check the drive unit itself for a secondary error code .

EX0456 (SPINDLE INDEX TIME UP): Spindle orientation or indexing failed to complete in the allowed time . Troubleshooting Steps

Identify the Signal: Navigate to the machine's message screen to view the active alarm history. PLC-specific alarms like EX codes can often be traced back to a specific "coil" or signal in the LADDER diagram (e.g., searching for signal X1009.5 for door sensors) .

Check Physical States: Verify that all sensors (proximity switches, pressure switches) are clean and properly triggered. For hydraulic alarms like EX2568, check the Hydraulic Power Unit (HPU) for its own internal error codes . mori seiki ex alarm list

Manual Reset: Some alarms require a full power cycle or a specific manual reset procedure (like re-homing an axis using "P+CAN") to clear .

For exhaustive documentation, you can refer to comprehensive guides such as the Mori Seiki EX Alarm Code Overview or the Dura Vertical Alarm List. Mori Seiki Alarm Codes Overview | PDF - Scribd

Mori Seiki machine "EX" alarms generally refer to external PLC alarms (Machine Alarms) defined by Mori Seiki rather than the standard NC alarms provided by the control manufacturer like Fanuc. These codes typically signal issues with peripheral machine functions such as sensors, door interlocks, hydraulics, and tool changers. Common EX Alarm Categories

While specific codes can vary slightly between models (e.g., NLX, NMV, or Dura), the following are frequent "EX" alarms and their standard meanings: Door & Safety Interlocks EX0026: Door not closed during cycle start.

EX0068 / EX0069: Door interlock or door lock check time over.

EX1024: Door must be opened once before starting a new cycle. Spindle & Turret Operations EX0312 / EX0386: Turret zero-return required.

EX0356 / EX0357: Turret indexing time-out (Turret #1 or #2). EX0456: Spindle orientation or indexing time-up.

EX0406: Spindle interlock signal is ON (prevents rotation due to a safety condition). Fluid & Pressure Systems EX0554: Oil-air pressure still down. EX0560: Air pressure drop/low. EX0561: Hydraulic oil pressure low. EX0570: Insufficient lubrication oil (Level Low). EX2568: Hydraulic unit alarm. Load & Overload EX1037 / EX1038: Spindle or X-axis overload. EX1050 / EX1051: Spindle or X-axis load warning. Peripheral & Operator Panel EX0097 / EX0099: Operator panel I/O or general panel alarm. EX0911 / EX0968: Bar stock has run out (Barfeeder). Troubleshooting Resources

For detailed lists and diagnostic procedures, refer to these professional documentation sources:

Comprehensive Lists: The Mori Seiki EX Alarm Code List on Scribd provides a high-level overview of codes from EX0013 through EX2027.

Official Downloads: Check the DMG MORI Download Center for official maintenance and instruction manuals tailored to your specific machine serial number.

Advanced Diagnostics: If a code is ambiguous, technicians often use the NC Ladder screen to find the specific coil (e.g., M7429 for EX0406) triggering the alarm to identify the missing sensor or signal condition.

Are you currently seeing a specific EX alarm number on your machine's screen that you need help clearing?

Mori Seiki EX Alarm Codes Overview | PDF | Lubricant - Scribd

Mori Seiki "EX" alarms are PLC-related messages that originate from the machine tool builder rather than the underlying CNC control (such as Fanuc or Mitsubishi). These alarms typically indicate mechanical, electrical, or sequence-related issues specific to the machine's peripheral hardware, such as the hydraulic unit, automatic tool changer (ATC), or door interlocks.

Below is a categorized list and troubleshooting guide for common Mori Seiki EX alarms. Common Mori Seiki EX Alarm Codes Alarm Code Description & Potential Cause EX0018 NEED ZERO-RETURN

Cycle start was activated before completing X and Z-axis zero returns after a machine lock cancel. EX0020 EDITING SWITCH KEY IS ON

Cycle start was attempted while the Edit Key switch was still in the ON position. EX0024 CHUCK UNCLAMPED

Attempted cycle start without the chuck being properly clamped. EX0026 DOOR NOT CLOSED The machine door is open, preventing cycle initiation. EX0069 DOOR LOCK CHECK TIME OVER

The door lock confirmation signal did not reach the control within the allotted time. EX0095 TURRET ILLEGAL MOVEMENT

The turret moved without a command; often caused by a faulty output driver or clamp signal. EX0099 PANEL ALARM

Indicates a general failure on the operation panel or flat-panel, often requiring a hardware check. EX0344 IMPROPER TURRET

The turret station number is out of the parameter range set for the machine. EX0453 MILL SPINDLE ALARM A fault in the milling spindle amplifier or drive unit. EX1001 HYDRAULIC UNIT ALARM The EX Alarm List is typically organized numerically,

The hydraulic power unit reports a fault, such as low pressure or readiness failure. EX1449 SENSORING TOOL IN SPINDLE

The tool state prevents the ATC from returning or removing the tool in the spindle. Troubleshooting Steps Mori Seiki Alarm Codes Overview | PDF - Scribd

Mori Seiki are machine-specific external alarms generated by the PLC (Programmable Logic Controller) rather than the standard CNC control (e.g., Fanuc or Mitsubishi). They typically relate to peripheral devices like the

turret, tool changer, lubrication system, or safety interlocks 🛠️ Common Mori Seiki EX Alarms Operational & Setup Alarms Need Zero-Return

– The machine requires an X or Z-axis reference return before operation. Editing Switch Key is ON

– Cycle start was attempted while the write-protect key was in the "ON" position. Chuck Unclamped

– Attempted to start a cycle while the chuck was not securely closed. Door Not Closed

– Safety door interlock is active; the door must be closed to start the cycle. Turret & Tooling Alarms Turret Illegal Movement

– The turret attempted to move without a command; check the output driver or clamp signal. Need Turret Zero-Return

– The turret station is not indexed to the correct home position. EX0356/0357: Turret Index Time Over

– The turret failed to complete its rotation within the allotted time; often caused by mechanical obstruction or sensor failure. EX0374/0375: Tool Life Up – Pre-set tool life count has reached its limit. Spindle & Motor Alarms Spindle Drive Unit Alarm – A fault has occurred in the spindle amplifier or drive. Spindle Orientation Time Up

– The spindle failed to reach its oriented stop position within the set time. EX1037/1038/1040: Overload Alarms

– Spindle, X-axis, or Z-axis is experiencing excessive load, possibly due to a crash or dull tooling. Maintenance & Fluid Alarms Electrical Cabinet Overheat

– Temperature inside the cabinet is too high; check fans and filters. Air Pressure Drop

– Incoming shop air pressure is below the minimum required for tool changes or clamping. Oil Pressure Low

– Hydraulic pressure has dropped below the operating threshold. Insufficient Lubrication Oil

– Way-lube tank is low; refill the reservoir to clear the alarm. 🔍 Troubleshooting Steps Check the Message:

Most EX alarms include a brief text description on the screen. Inspect Sensors: Many EX codes (like EX0069 Door Lock

) are triggered by proximity switches that may be dirty or misaligned. Reset Power: For logic-based errors (like

), turning the machine power OFF and then ON can sometimes clear the state. Verify Fluid Levels:

Always check oil, air, and coolant levels first for any code in the

To help you troubleshoot a specific issue, could you tell me: exact alarm number showing on your screen?

of Mori Seiki machine you are using (e.g., NL, NH, DuraTurn)? What the machine was doing right before the alarm occurred? Mori Seiki Alarm Codes Overview | PDF - Scribd A well-structured EX list will also provide a

combination M-commands have been mistakenly given at the same time. * EX0013, M85-COMMAND WITH SPINDLE ON, ALM0013, A0. 0, An M85. Mori Seiki Alarm Codes Overview | PDF - Scribd

pressed together with the O.T. release button after the hard O.T. limit switch has been. tripped. EX0064, AUTO-DOOR OPEN, ALM0064,

Mori Seiki EX Alarm Codes Overview | PDF | Lubricant - Scribd

On a Mori Seiki machine, "EX" alarms (External Alarms) are specific to the machine's PLC (Programmable Logic Controller) rather than the underlying Fanuc or Siemens CNC system. They usually signal that a physical condition—like a door being open or a sensor failing—is preventing the machine from operating.

Here is a list of common Mori Seiki EX alarms and what they typically mean: Common Safety & Interlock Alarms

EX0064: Auto-Door Open: The door closed detection signal was lost while the machine was supposed to be running.

EX0069: Door Lock Check Time Over: The system did not receive a "door locked" confirmation signal within the expected timeframe.

EX2027: Interlock Key Switch Released: The safety interlock key was turned to "release" during an automatic cycle.

EX4002: Open the Door then Close: A startup safety check requiring you to cycle the door once to verify the safety circuit. Spindle & Gearbox Alarms

EX0451: Spindle Drive Unit Alarm: A fault in the spindle's electrical drive system.

EX0456: Spindle Index Time Up: The spindle failed to reach its oriented position (indexing) within the allowed time.

EX0470: Gear Shift Error: A failure in the gear-shifting mechanism, often requiring a check of the gear sensors (e.g., SQ22 or SQ23).

EX0491: Spindle Speed Abnormality: The actual spindle speed does not match the commanded speed.

Mori Seiki EX Alarms are machine-specific external errors triggered by the Programmable Machine Control (PMC) rather than the base Fanuc or Mitsubishi CNC system. These codes typically relate to physical machine hardware like doors, turrets, spindles, and safety interlocks. www.scribd.com Common EX Alarm Categories Safety & Interlocks : Issues with door locks, emergency stops, or safety tests. Turret & Tooling

: Problems with turret indexing, clamp/unclamp signals, or illegal tool commands. Spindle & Tailstock

: Spindle speed abnormalities, lubrication failures, or tailstock position errors. Environment & Maintenance

: Overheating in electrical cabinets or low pressure in oil-air lubrication systems. www.scribd.com Frequent Mori Seiki EX Alarm Codes Alarm Code Description / Solution AUTO-DOOR OPEN Auto-door closed signal deactivated without a command. DOOR LOCK CHECK Door lock signal not received within the specified time. TURRET ILLEGAL

Turret moved without a command; check output driver or clamp. PANEL ALARM General operator panel or power supply condition error. IMPROPER T-CODE An invalid tool command was issued (Head 2/Turret 2). SPINDLE DRIVE Spindle drive unit alarm has been activated. SPINDLE SPEED Spindle speed abnormality detected; check parameters/unit. CABINET OVERHEAT

Excessive heat in the electrical cabinet; check filters/fans. LUBE PRESSURE Oil-air lubricant pressure is too low. Z-AXIS OVERLOAD Z-axis is overloaded during operation. BATTERY LOW Change the battery for memory backup. Execute safety validation test before starting operation. Mori Seiki Alarm Codes Overview | PDF - Scribd

pressed together with the O.T. release button after the hard O.T. limit switch has been. tripped. EX0064, AUTO-DOOR OPEN, ALM0064, www.scribd.com

Mori Seiki EX Alarm Code List | PDF | Switch | Equipment - Scribd

An EX (External) alarm is a user-defined or builder-defined alarm that originates from the PLC (Programmable Logic Controller) inside the machine. While the CNC control (Fanuc, Mitsubishi, or Siemens) handles axis movement and spindle speed, the PLC handles the "body" of the machine: coolant pumps, chip conveyors, door locks, hydraulic units, tool changers, and safety interlocks.

When a sensor fails to activate within a set time, or a hydraulic pressure switch remains open, the PLC triggers an EX alarm.