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Identify the exact line number where alarm occurred from the CNC display or alarm history.

Review the program block and verify which canned cycle is active (check previous blocks for G73, G74, G76, G80-G89).

Check if the flagged block contains tool changes, coordinate system changes, plane changes, or reference point returns (G28/G30) - these must be issued after G80 (cycle cancel).

Add G80 command before the incompatible command to cancel the active cycle, or relocate the command outside the cycle sequence.

Always verify cycle cancellation with G80 before major modal changes to prevent dimensional errors.

Locate the canned cycle call block (G73-G89) in the program at or immediately before the alarm line.

Cross-reference the cycle type against Fanuc programming manual to verify all required parameters: R (retract), Z (depth), F (feedrate), and cycle-specific values like Q (peck depth) for G73/G83 or P (dwell) for G82/G89.

Verify R-plane is above Z-depth (R value must be greater than Z value in absolute coordinates) and all values are in correct measurement units.

Incorrect R and Z relationship can cause crashes even if alarm is cleared.

Add missing parameters to the cycle definition block or the initial cycle call line, ensuring proper format (e.g., G83 X__ Y__ Z__ R__ Q__ F__).

Review the alarm block and previous 5-10 blocks to identify all active modal G-codes and M-codes.

Check if cutter compensation (G41/G42) is active - cancel with G40 before canned cycle blocks. Verify no arc commands (G02/G03) are mixed with cycle commands.

Verify only one Group 01 G-code (motion command) exists per block - separate canned cycle calls from linear moves (G00/G01) into distinct blocks.

Insert modal cancellation commands (G40, G80) as needed, and restructure program to sequence compatible commands only, separating incompatible operations into sequential blocks.

Use RESET or mode change cautiously as it clears tool offsets and modal states - prefer programmatic cancellation.