What causes Siemens SINUMERIK alarm 22068?

Programming error in the part program related to the spindle function. Spindle configuration parameter mismatch for the commanded operation. Spindle encoder signal fault preventing speed or position control. Spindle drive fault affecting the ability to execute the commanded function. Gear stage or spindle mode conflict with the commanded function.

How do I fix Siemens SINUMERIK alarm 22068?

1. Review the program block that triggered the alarm for spindle command errors. 2. Check the SINAMICS spindle drive diagnostics for fault codes. 3. Verify spindle encoder signal quality in the diagnostics screen. 4. Review spindle configuration parameters for the commanded gear stage and mode. 5. Consult the Siemens SINUMERIK alarm manual for alarm 22068 specific remedy.

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Siemens SINUMERIK Controller

Spindle · Intermediate · 30-120 minutes

Alarm 22068

Siemens 840D 22068 - Channel block tool management: no tool available in tool group

Alarm 22068 fires when the NCK attempts to select a tool from a specified tool group during block execution, but no tools in that group are available for use. This typically occurs when all tools in the group have been disabled by tool monitoring functions (wear limits, breakage detection) or are marked as 'Disabled' in the tool management database, preventing the tool changer from executing the requested tool change operation.

Siemens SINUMERIKSpindleIntermediate30-120 minutes

22068

Siemens 840D 22068 - Channel block tool management: no tool available in tool group

Channel block tool management: no tool available in tool group

Root Cause Summary

Alarm 22068 fires when the NCK attempts to select a tool from a specified tool group during block execution, but no tools in that group are available for use. This typically occurs when all tools in the group have been disabled by tool monitoring functions (wear limits, breakage detection) or are marked as 'Disabled' in the tool management database, preventing the tool changer from executing the requested tool change operation.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Navigate to Diagnostics > Tool Management in the Siemens HMI (typically 840D Control Panel or ShopMill/ShopTurn interface). Verify the status of all tools in the affected tool group—look for tools marked as 'Disabled', 'Worn Out', or 'Broken'.
Do not force-enable tools without verifying actual tool condition; this can damage the workpiece or machine.
2
Check the tool life parameters via NCK > Tool Data > [Tool Group Name]. Review MD 36010 (TOOL_WEAR_LIMIT), MD 36012 (TOOL_BREAK_CHECK), and individual tool counters to confirm which monitoring condition triggered the disable state.
3
Reset tool wear counters or replace disabled tools in the group. Use menu path Diagnostics > Tool Management > Reset Wear Counters, or manually edit tool life values in the tool table (accessible via NC > Tool Management > Edit Tool Data).
4
Verify that at least one tool in the group is set to 'Ready' or 'Available' status before re-executing the block. If necessary, assign additional tools to the group via NC > Tool Management > Tool Groups.

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