What causes FANUC alarm 269?

Part program contains an illegal G-code or M-code combination for this alarm type. Missing or incorrect address word in the program block. Axis or parameter value out of range for the commanded function. Required option not enabled on this CNC for the commanded function. Conflict between active modal states and the commanded function.

How do I fix FANUC alarm 269?

1. Note the block number shown on the alarm screen and locate that block in the program. 2. Review the command in that block against the Fanuc programming manual for alarm 269. 3. Check for missing address words, incorrect values, or conflicting G-code combinations. 4. Verify any required CNC options are enabled if using advanced functions. 5. Correct the program and verify the fix before restarting machining.

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FANUC Controller

Program/G-code · Intermediate · 5-30 minutes

Alarm 269

Fanuc 269 - Retrace direction error

Alarm 269 RETRACE DIRECTION ERROR occurs when the control detects an invalid retract direction during a canned cycle or automatic tool retraction sequence. This is most commonly caused by attempting to retract in a direction that conflicts with the programmed approach vector, using incompatible G-code combinations with retract functions, or specifying an illegal initial level (R-point) that makes retraction impossible.

FANUCProgram/G-codeIntermediate5-30 minutes

269

Fanuc 269 - Retrace direction error

RETRACE DIRECTION ERROR

Root Cause Summary

Alarm 269 RETRACE DIRECTION ERROR occurs when the control detects an invalid retract direction during a canned cycle or automatic tool retraction sequence. This is most commonly caused by attempting to retract in a direction that conflicts with the programmed approach vector, using incompatible G-code combinations with retract functions, or specifying an illegal initial level (R-point) that makes retraction impossible.

Safety

Verify corrected program or parameters before resuming machining

Causes and Fixes

1
Identify the N-block number where alarm occurred and examine the canned cycle parameters (G73/G74/G76/G80-G89).
2
Verify that R-point value is above the Z-depth value (R > Z for vertical machining). Check that initial level allows proper clearance.
3
Confirm G98 (return to initial level) or G99 (return to R-point) is appropriate for the current tool position and workpiece setup.
4
Correct the R-point value to establish proper retract clearance above the Z-depth, typically R should be 2-5mm above the workpiece surface.
Always verify tool clearance after program modification to prevent collisions.

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