How do I fix and clear Mazak alarm 551?

Make reading possible by making bit 1 of parity V-check valid/invalid parameter TAP25 invalid. Clearing procedure: Tap alarm clear button.

ALARMSMazatrol Assistant

NOTICEAlarm code

551

PARITY V ERROR

Q: What does Mazak alarm 551 mean?

Mazak alarm 551 is "PARITY V ERROR". The contents of the paper tape or floppy disk cannot be read since they include a parity-V error(s). The number of sprocket holes in this area must be even. 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-V error(s). The number of sprocket holes in this area must be even.

What to do

1Make reading possible by making bit 1 of parity V-check valid/invalid parameter TAP25 invalid.

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 →