Mori Seiki Ex Alarm List [work]

The hydraulic unit pressure has dropped below the safe operating threshold. Check the hydraulic oil level, the pressure gauge, and the pressure switch functionality.

Because EX alarms are governed by the PLC, you can track them down using the PC/PMC diagnostic registers on your control: Press the key on the MDI panel. Select the PMC , PMCMNT , or DIAGN softkeys.

Mori Seiki machines have a built-in "Ladder" screen. This screen shows the electrical blueprint in real-time. Search for the EX alarm number in the ladder. Look at the line of symbols.

Most proximity sensors on Mori Seiki machines feature a built-in LED light. Manually actuate the mechanism (if safe to do so) to see if the light switches on and off, validating that the sensor reads target metal. Step 4: Clear the Alarm Safely

Since the EX series utilizes Fanuc controls (typically 16i/18i/21i or 0i-TD/TC), you will see standard Fanuc alarms. mori seiki ex alarm list

| Alarm Code | Description | Probable Cause & Solution | | :--- | :--- | :--- | | | Chuck Clamp/Unclamp Alarm | The machine cannot verify the chuck status. • Check the proximity switches inside the spindle nose (check for chips blocking the sensor). • Verify hydraulic pressure is sufficient. | | E305 | Spindle Rotating Interlock | The chuck was opened (or attempted to open) while the spindle was rotating. • Usually a safety logic error caused by a faulty switch or trying to force the door. | | E310 | Spindle Drive Alarm | Often linked to a Fanuc drive alarm (check the amplifier screen). • Could be overheating or encoder failure. |

are external Programmable Machine Control (PMC/PLC) error codes generated by the machine tool builder rather than the core CNC system. While standard NC alarms (like Fanuc or Mitsubishi system errors) indicate core controller faults, EX alarms explicitly signify issues with peripheral machinery, safety interlocks, hydraulics, sensors, and mechanical overloads managed by Mori Seiki's custom logic.

The door is actually open, or the safety switch is dirty or broken.

– Way-lube tank is low; refill the reservoir to clear the alarm. 🔍 Troubleshooting Steps Check the Message: The hydraulic unit pressure has dropped below the

: 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

Never let way lube or coolant drop near the critical minimum line. Establish a morning routine to top off all reservoirs.

Since EX alarms are PLC-based, they are often triggered by a limit switch, proximity sensor, or pressure switch.

The turret mechanism cannot physically unclamp from its curvic coupling to begin indexing. Select the PMC , PMCMNT , or DIAGN softkeys

: Safety and Operation Alarms (e.g., Door Open, Emergency Stop).

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

Comprehensive DMG Mori Seiki EX Alarm List: Troubleshooting and Solutions