What causes FANUC alarm 154?

H99 or D99 was programmed in the G-code but no tool group is currently active or registered in the tool life management table. A tool call was made referencing tool life group offsets before a T-code with a valid group assignment was executed. Parameters 13265 or 13266 are set to use a specific H or D code for tool life, but the program calls it without first selecting a tool from a life group. The tool life management data table is empty or the group containing the current tool was deleted or not set up correctly. Program sequence error where H99 or D99 is called after a tool change that selected a tool not belonging to any defined life management group.

How do I fix FANUC alarm 154?

1. Check the tool life management table on the control and verify that at least one group exists and contains tools with valid data including tool numbers and life counts. 2. Review the CNC program and confirm that a T-code calling a tool assigned to a life management group is executed before any H99 or D99 command appears. 3. Check parameters 13265 and 13266 to see if a custom H or D code is assigned for tool life offsets, then verify the program is not calling that code before a valid group tool is active. 4. If tool life management is not being used intentionally, change H99 and D99 in the program to the actual offset numbers that match the tool in the spindle. 5. Verify the tool currently called in the program is registered in the tool life group table with a valid group number, tool number, and life value greater than zero. 6. After correcting the program or tool life table, reset the alarm, perform a dry run, and confirm the offset is applied correctly before running production.

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FANUC Controller

Program/G-code · Intermediate · 20-45 minutes

Alarm 154

Fanuc Alarm 154 - NOT USING TOOL IN LIFE GROUP

Alarm 154 occurs when the program executes H99, D99, or specific H/D codes defined in parameters 13265/13266 to reset tool life group data, but no tool from any life management group is currently active in the spindle. The CNC cannot apply group life management commands without an active tool belonging to a monitored group.

FANUCProgram/G-codeIntermediate20-45 minutes

154

Fanuc Alarm 154 - NOT USING TOOL IN LIFE GROUP

ILLEGAL USE OF H99/D99

Root Cause Summary

Alarm 154 occurs when the program executes H99, D99, or specific H/D codes defined in parameters 13265/13266 to reset tool life group data, but no tool from any life management group is currently active in the spindle. The CNC cannot apply group life management commands without an active tool belonging to a monitored group.

Causes and Fixes

1
Navigate to SYSTEM > TOOL LIFE MANAGEMENT screen. Verify the current T-code tool number is registered in a tool life group and confirm group status shows tool as member.
2
Check the part program sequence before alarm point. Confirm a valid tool call (M06 with T-code) executed prior to H99/D99 command, and that tool number matches an entry in tool life data table.
3
Review parameters 13201-13204 (tool life management enable bits) to verify tool life management is properly enabled for the control configuration and matches the programming intent.
4
If tool should be in group, add the tool to appropriate life group via TOOL LIFE MANAGEMENT > REGIST screen, or remove H99/D99 command if group management not required for this operation.
Modifying tool life groups affects production tracking. Coordinate with process engineering before changes.

DIY Feasiblehigh confidence

Call a technician if:

·Parameter corruption suspected
·Tool life management system completely non-functional
·Repeated alarms after following all diagnostic steps

Prevention

Always use proper T code + M06 sequence before H99/D99 commands
Maintain consistent tool life group assignments
Verify tool life table integrity during setup
Include tool confirmation blocks at program restart points

Common Mistakes

Using H99/D99 without preceding tool call
Assuming tool is active without verification
Incorrect parameter 13265/13266 settings
Restarting programs without establishing tool context

Related Alarms

151 152 153 155

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