Low-to-moderate seismicity
The turret tried to move without a command. Check turret clamp sensors and output drivers.
Note: Alarm codes can vary slightly depending on the specific Mori Seiki model (e.g., NLX, NTX, DuraTurn, NHX) and the generation of the MAPPS/Fanuc control. Always consult your specific machine's ladder diagram and electrical manual for exact definitions. 1. Lubrication & Fluid Alarms (EX0001 – EX0099)
Close the door fully. If closed, inspect the mechanical key switch or proximity sensor for dirt, damage, or misalignment. EX0451: Door Interlock Switch Fault
Triggered by physical switches, fluid levels, pressure sensors, and mechanical interlocks.
On machining centers, the tool magazine failed to rotate to the targeted tool pot within the allocated time limit. Systematic Troubleshooting Protocol for EX Alarms mori seiki ex alarm list
Inspect and clean the high-pressure filters. Check for clogged nozzles or leaky seals. 2. Lubrication and Hydraulic Alarms (EX0200 - EX0399)
Step 3: Utilize the Diagnostic Screen (PMC/PLC Bit Monitoring)
Triggered directly by the drive amplifiers in the electrical cabinet. Common Mori Seiki EX Alarm List & Solutions
Turret indexes must be perfectly precise. Any misalignment triggers an external alarm. The turret tried to move without a command
The Mori Seiki EX alarm system is generally split into two distinct categories, which is the first hurdle for new operators to overcome.
Proactive maintenance is the best defense against EX alarms. A regular schedule can prevent many common issues before they trigger a fault.
Always start by verifying the obvious: hydraulic fluid levels, door closures, and chip conveyor jams. When those fail, access your machine’s PMC message history or log into the DMG MORI service portal with your serial number. For the rare, undocumented EX alarm, reading the PLC ladder directly is your ultimate fallback.
The automatic way lubrication system lacks pressure, or the reservoir is empty. Always consult your specific machine's ladder diagram and
The tailstock body or quill is not in the correct position for machining, or the forward pressure switch wasn't satisfied when pressing against the part center.
You will need your machine's serial number. Once logged in, go to: Documentation → Electrical Diagrams → Alarm List (PLC Messages) . The EX list is usually in Appendix B of the maintenance manual.
These codes indicate issues with fluid levels, pressures, or flow rates necessary to protect the cutting tools and the workpiece.