What causes FANUC alarm 353?

A move command in the G-code program is targeting an axis that has been disabled via parameter settings. The program is commanding movement on a slave axis that is currently under synchronous control, which does not allow independent movement. Bit 7 of parameter No. 8162 is set to 1 for a composite control axis, blocking direct move commands to that axis. The axis name used in the program does not match the active axis configuration, causing the control to interpret it as a restricted axis. A previous mode change such as entering synchronous or composite control was not properly cancelled before issuing axis movement commands.

How do I fix FANUC alarm 353?

1. Review the G-code block that triggered the alarm and identify which axis is being commanded. Confirm that axis is currently active and not assigned as a slave or composite axis. 2. Check parameter No. 8162 bit 7 for any axis involved in composite control. If bit 7 is set to 1, direct move commands to that axis are blocked and the program must be corrected to avoid commanding it independently. 3. Verify synchronous control settings in the relevant parameters such as No. 8180 series. If the axis is a slave in a sync pair, all movement must be commanded through the master axis only. 4. Check if the axis has been disabled through parameters such as axis removal settings or if the axis is set to an invalid state in the machine configuration. Re-enable the axis if it was unintentionally disabled. 5. If synchronous or composite control was activated mid-program, ensure the correct G-code cancel commands are issued before attempting to move the affected axis independently, then retest the program.

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FANUC Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 353

Fanuc Alarm 353 - INSTRUCTION FOR AXIS THAT CANNOT MOVE

Alarm 353 occurs when the control system receives a movement command (G00, G01, or other axis motion) for an axis that is currently prohibited from moving. This typically happens when an axis is disabled via parameter No. 1023, when an axis is configured as a slave in a tandem/synchronous control setup, or when composite control parameter No. 8162 bit 7 prevents independent axis motion.

FANUCServo/AxisIntermediate20-45 minutes

353

Fanuc Alarm 353 - INSTRUCTION FOR AXIS THAT CANNOT MOVE

ILLEGAL COMMAND FOR DISABLED AXIS

Root Cause Summary

Alarm 353 occurs when the control system receives a movement command (G00, G01, or other axis motion) for an axis that is currently prohibited from moving. This typically happens when an axis is disabled via parameter No. 1023, when an axis is configured as a slave in a tandem/synchronous control setup, or when composite control parameter No. 8162 bit 7 prevents independent axis motion.

Causes and Fixes

1
Navigate to SYSTEM > PARAM and display parameter No. 1023. Check the bit pattern to verify which axes are enabled (bit=1) or disabled (bit=0). Bit 0=1st axis, Bit 1=2nd axis, etc.
2
If the axis being commanded is disabled (bit=0), enable it by setting the corresponding bit to 1 in parameter No. 1023. Ensure you have parameter write enable (PWE) active.
Changing parameter No. 1023 requires a machine restart. Verify machine configuration before re-enabling axes.
3
Review the part program to confirm the G-code is not attempting to move an axis that should remain disabled for this machine configuration.
4
After parameter modification, cycle power to the CNC and verify axis movement with manual jog or MDI testing before running production programs.

DIY Feasiblehigh confidence

Call a technician if:

·Parameter changes don't resolve the issue
·Servo amplifier hardware faults detected
·Safety system modifications required

Prevention

Regularly verify axis enable parameters during setup
Document synchronous control configurations clearly
Train operators on proper coordinate system usage

Common Mistakes

Attempting to move slave axes directly in sync control
Forgetting to enable servo after parameter changes
Not checking composite control status before individual axis commands

Related Alarms

401 414 435 700

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