M Code

Instruction set used for auxiliary function control.

Definition

Instruction set used for auxiliary function control. Treat it as a machine-side action set that must match the builder and controller conventions.

M-codes control spindle, coolant, stops, clamps, tool change, and other auxiliary actions.
Execution timing can vary by controller, so read the machine manual together with the NC block.

Use it at tool changes, cycle boundaries, safe stops, and machine-specific actions.

If a machine response is missing, check whether that controller remaps or disables the M-code.
If sequencing feels wrong, inspect block order, dwell, and machine builder options.

Notebook covers SINUMERIK controller docs, NC variables, PLC signal maps, machine data, tool offsets, and Run MyScreens customization.
Notebook covers GSK controller families, PLC, MDI, compensation, simulation, RS232/USB communication, and backup workflows.
Notebook covers Mitsubishi controller operation, PLC interfaces, user macros, external I/O, alarms, and high-speed precision features.
来源将 M 代码定义为辅助功能，由 PLC 控制程序流程及主轴、冷却液、卡盘等机床动作。
来源描述 M 代码作为机床附加辅助功能指令，并涉及 M/S/T/D/H 等 PLC 信号映射。