What causes FANUC alarm 265?

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 265?

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 265. 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 265

Fanuc 265 - Retrace function not ready

Alarm 265 occurs when attempting to execute a retrace (restart) function but the control is not in the proper state to perform this operation. This typically happens when retrace conditions are not met, such as missing search data, incorrect machine state, or when the program has not been interrupted properly to allow restart functionality.

FANUCProgram/G-codeIntermediate5-30 minutes

265

Fanuc 265 - Retrace function not ready

RETRACE FUNCTION NOT READY

Root Cause Summary

Alarm 265 occurs when attempting to execute a retrace (restart) function but the control is not in the proper state to perform this operation. This typically happens when retrace conditions are not met, such as missing search data, incorrect machine state, or when the program has not been interrupted properly to allow restart functionality.

Safety

Verify corrected program or parameters before resuming machining

Causes and Fixes

1
Check if the machine was powered off or reset after the program interruption - retrace data is lost on power cycle.
2
Verify that parameter 3407#0 (restart enable) is set to 1 to enable the retrace function.
3
Ensure the program was interrupted properly (FEED HOLD) rather than by RESET, which clears restart data.
4
If restart is required, return to program start, re-home the machine, and restart the program from the beginning or use block search with proper setup.
Ensure workpiece position matches program start conditions before restarting

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