LinuxCNC M0

M0 is a G-code M instruction in LinuxCNC that pauses a running program temporarily. The controller remains in Auto Mode, so MDI and other manual actions are not enabled. Pressing the resume button restarts the program at the following line.

Source checked2/2 values · 2026-10-26

Specification

1 source

Language	gcode
Code	M0
Group	Program Pause
Dialect	LinuxCNC

Study notes

The document permits programming M0 in MDI mode, but notes the effect will probably not be noticeable because normal MDI behavior is to stop after each line of input.

Safety

M0 keeps LinuxCNC in Auto Mode, so MDI and other manual actions are not enabled while the program is paused.