M97 Local subprogram call

Haas NGC M-code · Mill, Lathe

On mills: Local subprogram call

Calls a subprogram that is in the same program at line number P. L repeats it.

Format

M97 P [L]

Addresses

Address	What it does
`P`	N line number where the local subprogram starts
`L`	Number of times to repeat

How it works

Not modal. Acts once on the line where it is commanded.

Example program

M97 P1000 L2 (RUN LOCAL SUB AT N1000 TWO TIMES)
M30 (END OF MAIN PROGRAM)
N1000 G91 G01 Z-.1 F10. (STEP DOWN)
G90 M99 (RETURN)

Example is in inch. Check offsets and clearances first.

Watch out for

The local subprogram should be after M30 and end with M99.
P is an N line number, not a program number.

On lathes: Local subprogram call

Calls a subprogram that starts at line N in the same program. L repeats it. The subprogram ends with M99.

Format

M97 P [L]

Addresses

Address	What it does
`P`	N line number where the subprogram starts
`L`	Repeat count

How it works

Non-modal.

Example program

M97 P1000 L2 (RUN N1000 TWICE)
M30 (END MAIN PROGRAM)
N1000 G00 X1.1 Z-.5 (LOCAL SUB START)
G01 X.9 F.003 (GROOVE)
…

The full 6-line example is in the app. Example is in inch. Check offsets and clearances first.

Watch out for

Put the local subprogram after M30 so it does not run by itself.
P values are modal in canned cycles. Do not call M97 with a cycle active.

Related codes

M98 · M99

M97 on other controls

The same number can mean something different on another control.

Control	Meaning
Fanuc	Interrupt type macro disable
DMG Mori MAPPS (Fanuc)	Macro interrupt mode cancel
Mazak (EIA)	User macro interruption, invalid
Mitsubishi M70 M80	Macro interrupt disable
Heidenhain TNC (ISO)	Machine small contour steps
Fadal	Intersectional cutter comp

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