What causes FANUC alarm 013?

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 013?

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 13. 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 013

Fanuc 13 - Illegal speed command

Alarm 013 occurs when the CNC control receives a spindle speed (S-code) or feedrate (F-code) command that exceeds programmed limits, is improperly formatted, or is incompatible with the current machine state. This is typically caused by programming errors such as out-of-range values, missing decimal points, or speed commands issued in inappropriate modes.

FANUCProgram/G-codeIntermediate5-30 minutes

013

Fanuc 13 - Illegal speed command

ILLEGAL SPEED COMMAND

Root Cause Summary

Alarm 013 occurs when the CNC control receives a spindle speed (S-code) or feedrate (F-code) command that exceeds programmed limits, is improperly formatted, or is incompatible with the current machine state. This is typically caused by programming errors such as out-of-range values, missing decimal points, or speed commands issued in inappropriate modes.

Safety

Verify corrected program or parameters before resuming machining

Causes and Fixes

1
Identify the exact line number where the alarm triggered by checking the control display or program cursor position.
2
Review the S-code (spindle speed) and F-code (feedrate) values on that line and compare against machine specifications and parameter limits (check parameters 3741-3743 for max spindle speed, 1430-1432 for max feedrate).
3
Verify decimal point programming is correct - ensure G96 (CSS) mode has appropriate surface speed values and G97 (RPM) mode has appropriate spindle RPM values.
4
Correct the S or F value to be within allowable limits and restart the program from a safe position.
Always verify spindle direction and workpiece clearance before restarting after correcting speed commands.

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