What does Mazak alarm 442 mean?

Mazak alarm 442 is "DATA RENEWAL NOT ALLOWED". No updates can be made to the machining program. Error type: Operation — wrong key or incorrect operation. Machine state: Operation continued — machine still running.

How do I fix and clear Mazak alarm 442?

This message may also be displayed when the NC unit is busy processing data. Tap the alarm clear button and then carry out the operation once again. Clearing procedure: Tap alarm clear button.

ALARMSMazatrol Assistant

NOTICEAlarm code

442

DATA RENEWAL NOT ALLOWED

What it means

No updates can be made to the machining program.

What to do

1This message may also be displayed when the NC unit is busy processing data.
2Tap the alarm clear button and then carry out the operation once again.

Codebook — decoded

AError typeOperation — wrong key or incorrect operation

LStop statusOperation continued — machine still running

SClearingTap alarm clear button

Still faulted after these steps? Do not restart under load — ask the Mazatrol assistant.

Still stuck? Ask the Mazatrol assistant →