How do I fix and clear Mazak alarm 550?

Reading must be carried out only after replacing the paper tape or floppy disk or after re-punching the program. Clearing procedure: Tap alarm clear button.

ALARMSMazatrol Assistant

NOTICEAlarm code

550

PARITY H ERROR

Q: What does Mazak alarm 550 mean?

Mazak alarm 550 is "PARITY H ERROR". The contents of the paper tape or floppy disk cannot be read since they include a parity-H error(s). (The number of holes on tape must always be even for ISO; it must be odd for EIA). ← Sprocket Error type: Operation — wrong key or incorrect operation. Machine state: Operation continued — machine still running.

What it means

The contents of the paper tape or floppy disk cannot be read since they include a parity-H error(s). (The number of holes on tape must always be even for ISO; it must be odd for EIA). ← Sprocket

What to do

1Reading must be carried out only after replacing the paper tape or floppy disk or after re-punching the program.

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 →