Seiki Ex Alarm List — Mori

: Indicates a communication breakdown or power fluctuation at the operator panel. 2. Spindle & Drive Unit Diagnostics (EX0400 – EX0499)

Watch the bits change from 0 to 1 as you manually toggle the physical switch to see if the control registers the change. 3. Verify Hardware Power and Relays

For any machinist, setup technician, or maintenance engineer running a Mori Seiki (now DMG MORI) CNC lathe or machining center, few things are as jarring as a sudden halt in production accompanied by a cryptic on the control panel. Unlike standard CNC machine alarms (which often relate to servo overloads or program errors), EX alarms are machine manufacturer-specific. They are the machine tool builder’s way of telling you about a hardware limit, a missing input signal, or a safety violation.

EX alarms stand for . They indicate that the CNC control itself is working fine, but an external condition required for safe operation has not been met. These alarms are programmed by Mori Seiki via the ladder logic to protect the operator, the workpiece, and the machine components.

Before pressing any buttons, write down the exact EX alarm number and the text displayed on the screen. Note exactly what the machine was doing when the alarm occurred (e.g., "happens immediately upon indexing to Tool 4" or "occurs 10 minutes into running a cold machine"). Step 2: Utilize the Diagnostic Screen (PMC Signals) mori seiki ex alarm list

To help me provide the exact troubleshooting steps or sensor locations for your machine, could you tell me:

This document provides a systematic, easy-to-scan alarm list for Mori Seiki EX series CNC machines. It groups alarms by category, gives typical causes, and suggests first-line troubleshooting steps. Use this as a quick-reference; follow your machine’s manual and safety procedures for detailed diagnostics and repairs.

Coolant evaporated or splashed out during cutting.

A huge percentage of EX alarms are just the machine asking for food. Check the way lube, hydraulic oil, and coolant tanks first. 4. Clean the Sensors : Indicates a communication breakdown or power fluctuation

Before opening electrical cabinets, check the obvious variables: Is the coolant tank full? Is the way-lube reservoir topped up? Are all safety doors completely closed and clear of chips?

Cycle start was pressed while the main enclosure door was unlatched.

The automatic tool changer is a complex dance of mechanical and electronic coordination. Interruptions are common but usually resolvable.

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. They are the machine tool builder’s way of

These errors ensure that workholding is secure before the spindle spins or axes move.

– A spindle rotation command was given while the chuck was not securely clamped.

Clean chips out of door tracks and wipe down all visible proximity switches. Hydraulic Units

Do not let long stringy chips wrap around the chuck actuator, tool turret, or tailstock. Regularly clear the working envelope.