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FANUC Controller
Program/G-code · Intermediate · 5-30 minutes
Fanuc 168 - Axis not exist
Alarm 168 occurs when the part program references an axis that is not configured or available on the machine. This typically happens when a program written for a different machine is loaded, or when axis names in the program don't match the control's axis configuration parameters.
168
Fanuc 168 - Axis not exist
AXIS NOT EXIST
Fanuc PS program alarm 168: AXIS NOT EXIST. This alarm is triggered by an illegal or incorrectly formatted command in the part program, or a programming condition that the Fanuc control cannot execute.
Root Cause Summary
Alarm 168 occurs when the part program references an axis that is not configured or available on the machine. This typically happens when a program written for a different machine is loaded, or when axis names in the program don't match the control's axis configuration parameters.
Safety
- Verify corrected program or parameters before resuming machining
Causes and Fixes
- 1
Review the program line number displayed with the alarm to identify which axis is being called.
- 2
Check parameter 1020 (number of controlled axes) to verify how many axes are configured on the control.
- 3
Check parameters 1021-1030 to verify which axis names are assigned and match them against the program requirements.
- 4
Either remove the non-existent axis commands from the program or reconfigure parameters if the axis should be available.
Changing axis parameters requires machine re-initialization and may affect all existing programs. Backup parameters before making changes.
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