Reference
Mazak Mazatrol Alarm Codes
62 alarms across T-Plus, T-32, Matrix, SmoothG, and Smooth Ai controls. Each one cross-referenced against primary sources — Mazak manuals, PracticalMachinist threads, CNCZone discussions, and YouTube walkthroughs from working machinists.
Every cause and every clearance step links back to the exact source it came from, so you can verify any claim yourself.
| Code | Name | Controls | ||
|---|---|---|---|---|
| 001 | Emergency stop | T-Plus, T-32, Matrix +1 | E-stop button pressed, safety circuit open, or drive fault during power-up | Details |
| 2 | EMERGENCY STOP (Hardware trouble) | Matrix, Matrix 2 | Trouble has occurred in the hardware. | Details |
| 3 | EMERGENCY STOP (E-stop button pressed) | Matrix, Matrix 2, T-32 +1 | The emergency stop button on the operating panel has been pressed. | Details |
| 3 | EMERGENCY STOP (&0000FFBF) | Mazatrol Matrix Nexus | Multiple possible causes — door interlock, drive ready signal missing, external E-stop loop break, chip conveyor, etc. The R69 interface sig… | Details |
| 9 | ABSOLUTE POSITION MALFUNCTION | Matrix, Matrix 2 | The absolute position detection system has lost absolute position data. | Details |
| 12 | ABSOLUTE POSITION WARNING (battery low) | Matrix, Matrix 2 | The absolute position detection system has detected abnormal data. | Details |
| 20 | NMI Emergency Stop (spindle start) | T-Plus | Spindle VFD is drawing more current at start than the drive can supply — manifests as Alarm 20 'NMI Emergency Stop' as soon as the spindle i… | Details |
| 21 | Power Drive Fault / Insufficient Voltage (Spindle, FR-SF) | T-32, T-Plus | FR-SF spindle drive is not getting a clean encoder signal from the spindle PLG (pulse generator). The Z-phase amplifier signal voltage is ou… | Details |
| 22 | AMPLIFIER NOT EQUIPPED | Matrix, Matrix 2 | Amplifier power is not yet turned on. Or no signals are transferred yet. There is a discrepancy between the channel and rotary switch Nos. o… | Details |
| 22 | Feedback System Malfunction | T-32, Fusion 640T, Matrix | Backup battery for the absolute position data detection circuit has dropped voltage — absolute position data may be lost and re-homing requi… | Details |
| 22 | Feedback System Malfunction (1, 0, &0043) | Mazatrol 640T | Feedback system fault on the affected axis — encoder, feedback cable, or drive feedback path is failing. | Details |
| 24 | OVERLOAD (variants: &0058, &0059, S0058, S005A) | Fusion 640T | Sub-variants reflect different root causes — &0058/&0059 are typical drive-side overload; S005A is triggered by collision detection during c… | Details |
| 24 | Overload (servo) | T-32, Fusion 640T | Y and B axes share a servo drive on some Integrex machines — when the drive is marginal or aged, the least-used axes (Y, B) throw overload f… | Details |
| 25 | MAIN POWER SUPPLY MALFUNCTION (1, 0, &0061) | Mazatrol 640T | Main power supply fault — capacitor bank, regen resistor, or input rectifier on the power module is failing. | Details |
| 33 | SERVO MALFUNCTION 2 (&0000004D, &0004, &0021) | SmoothG | Loose contact inside the control board at the Z-axis encoder connection — random vibration triggered the alarm intermittently. | Details |
| 35 | OVERLOAD (servo) | Matrix, Matrix 2 | An extraordinary overload has been detected. | Details |
| 52 | BATTERY ALARM (NC memory backup) | Matrix, Matrix 2, T-32 | The battery provided to retain parameters, machining programs and other types of data within the NC unit has reached the minimum voltage lev… | Details |
| 53 | NC TEMPERATURE WARNING | Matrix, Matrix 2 | The temperature of the control unit or operation board has increased above the required level. | Details |
| 72 | SERVO WARNING (abnormal load) | Matrix, Matrix 2 | The servomotor is loaded abnormally. | Details |
| 82 | SPINDLE WARNING (abnormal load) | Matrix, Matrix 2 | The spindle amplifier is loaded abnormally. | Details |
| 100 | Soft Limit / Overtravel | T-Plus, T-32, Matrix | An axis attempts to move beyond its programmed travel boundary | Details |
| 101 | SOFT LIMIT | Matrix, Matrix 2 | Some mistake in operations during the automatic operation has caused the tool tip to overstep the area specified in the software limit param… | Details |
| 113 | OVER TRAVEL (hardware limit) | Matrix, Matrix 2 | The tool tip has reached stroke limit in the direction of the axis corresponding to the displayed axis name. | Details |
| 121 | Overtravel (X axis) | T-32, Fusion 640T | Parameters were lost after backup battery died — the X-axis offset reads as '****.****' which the control treats as outside the soft-limit e… | Details |
| 131 | CUTTING FEED OVERRIDE ZERO | Matrix, Matrix 2 | The cutting-feed override value is set to 0 on the machine operating panel. | Details |
| 133 | Stop Spindle (rigid-tap tool data) | Matrix, Matrix 2 | On a rigid-tap cycle the milling spindle never starts and Alarm 133 fires. The Tool Data 'holder type' setting being on 'fixed' for a rigid … | Details |
| 148 | CHUCK BARRIER | Matrix, Matrix 2 | The tool entered in the chuck barrier. | Details |
| 149 | TAILSTOCK BARRIER | Matrix, Matrix 2 | The tool entered in the tail barrier. | Details |
| 156 | Illegal Measuring Sensor Signal | Matrix | Tool eye touch-off failed because the operator was not in jog mode (machine was in rapid or fast jog) when approaching the tool eye, or the … | Details |
| 200 | THERMAL TRIP (EMERGENCY STOP — Integrex) | Matrix, Fusion 640T | Thermal relay for the hydraulic unit has tripped. | Details |
| 201 | BREAKER TRIP | Matrix | Power line on/off circuit breaker QF2, QP3, QF4, QF81, or QF82 has tripped. | Details |
| 202 | HYDRAULIC PRESSURE DOWN | Matrix | An oil pressure decrease below the required level has activated the pressure switch. | Details |
| 203 | AIR PRESSURE DOWN | Matrix | An air pressure decrease below the required level has activated the pressure switch SP30. | Details |
| 204 | Spindle controller malfunction | T-3, T-32, Fusion 640T +2 | An alarm occurred at the spindle controller | Details |
| 205 | Milling controller malfunction | T-3, T-32 | External alarm from the milling spindle controller — frequently a milling spindle amplifier fault, disconnected milling VFD, or misaligned c… | Details |
| 215 | CHUCK SYSTEM MALFUNCTION | Matrix | An erroneous chucking action was detected during chucking operation. The chuck unit has failed to grip the material. The chuck open/close en… | Details |
| 218 | CHUCKING TYPE NOT SELECTED | Matrix | Type of chucking (inner/outer) of spindle chuck is not selected. | Details |
| 218 | Axis Move Misoperation / Chucking Type Not Selected | T-3, T-Plus, T-32 +1 | Servo lag — motor cannot position the axis (almost always paired with Alarm 2 'Servo lag excess'). On older DC-drive Mazaks the cause is bru… | Details |
| 220 | Turret Position Sensor Malfunction | T-32, T-32B | Turret encoder (Tamagawa TS1857N16 on QT15N) is failing — the station-1 indicator LED on the encoder lights randomly across other stations i… | Details |
| 221 | Turret Clamp Sensor Malfunction | Mazatrol 640T | Tool indexing failure on ST60/ST80 — turret clamp sensor (proximity switch on the turret face) is not signaling clamped position within the … | Details |
| 250 | Spindle start misoperation | T-Plus, T-32, T-32B +3 | Spindle rotation command was given while the chuck was not closed (mis-chucking), or the chuck open/close check sensor is mis-adjusted | Details |
| 251 | Milling motor rotation prohibited | T-Plus, T-32 | Milling spindle rotation commanded while the chuck was not closed, the milling tool was not clamped, the B-axis was not clamped, or the door… | Details |
| 252 | Axis Movement Inhibited (collet closed, sub-spindle not home) | Fusion 640T | Closing the collet while the B-axis (sub-spindle) is not at its home position triggers 252. Also surfaces during sp1→sp2 transfer when chuck… | Details |
| 253 | Skip Malfunction (tool setter) | T-32 | Skip proxy signal at the tool setter is broken — proxy LED comes on but the signal does not arrive at the PLC. In one documented case the si… | Details |
| 260 | Slideway lubrication alarm | T-Plus, T-32, T-32B +1 | Pressure switch for slideway lubrication (SP67) did not turn on within a fixed time | Details |
| 260 | Slideway / Grease Lubrication Alarm | T-32, T-Plus, SmoothG | Way-oil tank ran out. Refilling clears the alarm, but if it ran completely empty there is air in the lines and the alarm can persist for a c… | Details |
| 261 | Head lubrication alarm | T-Plus, T-32, Mazatrol 640T | Pressure switch (SP25, SP26 or SP27) in the spindle cooling unit has activated | Details |
| 276 | ATC CYCLE EXCEED TIME | Matrix | Although 120 seconds have passed since the issuance of the ATC command, the operation complete signal does not turn on. | Details |
| 28F | Emergency Stop (28 F) | T-2 | Chip conveyor was originally fitted but is now unplugged — its E-stop loop is open. Any unplugged peripheral that was in the safety chain (b… | Details |
| 293 | Optional Sensor 4 (Tailstock not Homed) | T-2, T-32 | Tailstock quill was not homed after E-stop was pressed — the control no longer knows where the tailstock is. On QT machines without a tailst… | Details |
| 297 | CHUCK PRESSURE DOWN | Matrix | The spindle chuck pressure remains reduced in a machine having a spindle chuck pressure guarantee option. | Details |
| 300 | START COND. ERR. (DOOR OPEN) | Matrix | The cycle start button was pressed while the front cover (front door) was opened. | Details |
| 354 | USER alarm #354 (Coil F154 on PLC LADDER) | SmoothG | User-defined alarm wired to PLC ladder coil F154 — typically a missing condition (set-up switch, door, or option not enabled). | Details |
| 354 | Cond.Missing (Set Up Switch) | Mazatrol Matrix Nexus | Missing condition signal — PLC ladder coil F154 is not satisfied. On Matrix Nexus, controlled by PLC parameter RB30.3. | Details |
| 360 | Alarm 360 (disconnected capacitor) | Mazatrol (unspecified — MAZAK WORKS channel) | Disconnected capacitor in the control / drive cabinet caused alarm 360 to trigger. | Details |
| 369 | Low Way Lube Oil | Mazatrol (unspecified — MAZAK WORKS channel) | Way lubrication oil reservoir is below the float-switch threshold. | Details |
| 380 | Alarm 380 (PLC LADDER text / Y63 LED lamp ladder rung) | Mazatrol (Mazak ST60 MR-J2 commissioning) | Wired into the PLC ladder against the Y63 LED lamp output — when the ladder output is asserted incorrectly during ST60 commissioning, the 38… | Details |
| 394 | ATC Malfunction | Fusion 640T | Backup battery in the ATC servo drive is dead. The alarm appears even though the ATC positions show normal in the maintenance menu and the p… | Details |
| 442 | Data Renewal Not Allowed | Mazatrol 640T | Part program number referenced by the operation is missing — the trailing 3210 in the alarm string ( 6, 3, 3210) is the missing program numb… | Details |
| 651 | Layout Unable (program structure) | T-32 | On twin-spindle Mazatrol programs, the SEPARATE / sub-spindle unit is not in the right order in the program tree — for example the Separate-… | Details |
| 814 | Unfinished Tool Set | T-32, T-32B | Tool 1 in the Tool Data page has not been configured, even though the program only calls T8. The T-32 requires Tool 1 to be set up before an… | Details |
| Z52 | Battery Fault 0003 | Mazatrol M730L | Encoder backup battery low — the lithium cell preserving absolute-encoder memory while the machine is off has fallen below threshold. | Details |
Related reading
Reference
Mazak G-Code & M-Code Reference
Full G/M-code reference for Mazak lathes, plus how Mazak names their machine families.
Article
Mazatrol Lathe Tips From 45 Years on the Floor
Specific tips on tool data, WPC, sub-spindle transfers, insert selection.
Overview
What is Mazatrol?
Mazak's conversational programming language — versions, generations, and where it sits next to G-code.
Alarm not in the list?
Tom has 45+ years on Mazak lathes and 19 years at Mazak Corp as an Applications Engineer. Send the code, the control, and the machine — we'll tell you what we know.