What causes FANUC alarm 244?

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 244?

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 244. 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 244

Fanuc 244 - Speed control axis invalid

Alarm 244 occurs when the programmed speed control axis specification is invalid or incompatible with the machine configuration. This typically happens when using G96 (constant surface speed) or similar speed control commands with an axis that is not properly configured or does not exist in the current machine setup.

FANUCProgram/G-codeIntermediate5-30 minutes

244

Fanuc 244 - Speed control axis invalid

SPEED CONTROL AXIS INVALID

Root Cause Summary

Alarm 244 occurs when the programmed speed control axis specification is invalid or incompatible with the machine configuration. This typically happens when using G96 (constant surface speed) or similar speed control commands with an axis that is not properly configured or does not exist in the current machine setup.

Safety

Verify corrected program or parameters before resuming machining

Causes and Fixes

1
Review the program line causing the alarm and identify which axis is specified for speed control (typically after G96 or G97 command).
2
Check parameter 1006 (axis number for constant surface speed control) to verify which axis is configured for G96 operations.
Document original parameter values before making any changes.
3
Verify the specified axis in the program matches the axis configured in parameter 1006, or modify the program to use the correct axis designation.
4
If multi-spindle configuration, ensure the correct spindle is selected (M13/M14/M15) before issuing the G96 command.

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