How do I fix and clear Mazak alarm 840?

Check the specifications and correct the program.

CRITICALAlarm code

840

CANNED CYCLE OPTION NOT FOUND (WNo., NNo., BNo.)

Q: What does Mazak alarm 840 mean?

Mazak alarm 840 is "CANNED CYCLE OPTION NOT FOUND (WNo., NNo., BNo.)". A fixed-cycle G-code has been designated although fixed-cycle specifications are not provided. Error type: Registered Data — program or tool data error.

What it means

A fixed-cycle G-code has been designated although fixed-cycle specifications are not provided.

What to do

1Check the specifications and correct the program.

Codebook — decoded

BError typeRegistered Data — program or tool data error

I (L)Stop statusunspecified

O (S)Clearingunspecified

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

Still stuck? Ask the Mazatrol assistant →