What causes FANUC alarm 228?

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 228?

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 228. 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 228

Fanuc 228 - Torque control axis not exist

Alarm 228 occurs when a G207 (torque control mode) command is issued for an axis that does not have torque control capability enabled or configured. The control detects that the specified axis lacks the necessary parameters, hardware, or software options to perform torque-controlled operations.

FANUCProgram/G-codeIntermediate5-30 minutes

228

Fanuc 228 - Torque control axis not exist

TORQUE CONTROL AXIS NOT EXIST

Root Cause Summary

Alarm 228 occurs when a G207 (torque control mode) command is issued for an axis that does not have torque control capability enabled or configured. The control detects that the specified axis lacks the necessary parameters, hardware, or software options to perform torque-controlled operations.

Safety

Verify corrected program or parameters before resuming machining

Causes and Fixes

1
Review the part program and identify which axis is specified in the G207 torque control command.
2
Check parameter 1808 (torque control axis designation) to verify if the flagged axis has torque control enabled (bit setting for each axis).
3
Verify parameters 2580-2587 (torque control related parameters) are properly configured for the target axis.
Incorrect parameter changes can cause machine damage. Record original values before modifications.
4
If torque control is not required for this axis, modify the part program to remove the G207 command or specify a different axis that has torque control capability.

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