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M21 External output

DMG Mori MAPPS (Fanuc) M-code · Mill and lathe

Trigger a specific signal to an external peripheral device (Output 1).

Machine builders set many M codes, and they change by model and options. Check the M code list for your machine.

M21 on other controls

The same number can mean something different on another control.

ControlMeaning
Haas NGCTailstock advance
Doosan (Fanuc)Optional block skip act
Mazak (EIA)Robot service call
Okuma OSPTailstock Barrier ON

Every M-code for DMG Mori MAPPS (Fanuc) in your pocket. The app has the full example programs, search by number or shop word, a line decoder and calculators for tapping, threading and drilling.

Open M21 in the app All DMG Mori MAPPS M-codes

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