What causes FANUC alarm 230?

Peripheral system (hydraulic, coolant, auxiliary) component fault or sensor indicating an out-of-limit condition. PMC input signal from the affected peripheral device not in the expected state. Fluid level, pressure, or temperature outside acceptable limits. Mechanical fault in the peripheral system mechanism. Wiring or sensor fault on the peripheral system I/O.

How do I fix FANUC alarm 230?

1. Identify the specific peripheral system indicated by the alarm name. 2. Check the fluid level, pressure, and temperature for the relevant system. 3. Inspect the relevant mechanism for mechanical faults or obstructions. 4. Check the PMC input signals for the peripheral system in the Fanuc PMC monitor. 5. Consult the machine tool builder documentation for alarm 230 specific remedy.

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FANUC Controller

Servo/Axis · Intermediate · 20-45 minutes

Alarm 230

Fanuc Alarm 230 - Rotary Table Error

Alarm 230 occurs when the G161 (High-Speed Peck Drilling Cycle) command is executed without a proper R code specification for the retract plane, or when the R value is programmed as a negative number. This is a programming error that prevents the cycle from executing because the control cannot determine the safe retract position for the drilling operation.

FANUCServo/AxisIntermediate20-45 minutes

230

Fanuc Alarm 230 - Rotary Table Error

Rotary Table Alarm

Root Cause Summary

Alarm 230 occurs when the G161 (High-Speed Peck Drilling Cycle) command is executed without a proper R code specification for the retract plane, or when the R value is programmed as a negative number. This is a programming error that prevents the cycle from executing because the control cannot determine the safe retract position for the drilling operation.

Safety

Table position uncertain

Causes and Fixes

1
Review the active NC program at the alarm stop position. Press RESET, then navigate to EDIT mode or MEM/MDI screen to identify the exact G161 block that triggered the alarm.
2
Verify the G161 block syntax. Proper format requires: G161 X_ Y_ Z_ R_ Q_ F_. The R code must be present and defines the retract plane position in absolute coordinates.
3
Add the missing R code to the G161 block with appropriate retract plane value. Ensure R value is set above the workpiece surface (e.g., G161 Z-50. R5. Q5. F500; where R5. is the retract plane).
4
Reset the alarm by pressing RESET key, return to program start or appropriate sequence number, and restart cycle. Verify operation in single block mode initially.
Ensure tool clearance is adequate when setting R value to prevent collision with workpiece or fixtures.

DIY Feasiblehigh confidence

Call a technician if:

·Parameter changes required beyond operator level
·Macro programming expertise needed
·Hardware rotary table issues suspected

Prevention

Always specify R parameter explicitly in G161 blocks
Use program verification before execution
Implement macro variable validation routines
Maintain consistent R value sign conventions

Common Mistakes

Assuming default R values exist for G161
Using negative R values for depth specification
Not initializing macro variables before G161
Copying G161 blocks without verifying R parameters

Related Alarms

229 231 010 011

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