What causes Siemens SINUMERIK alarm 104001?

Required machine data or parameter not configured for the requested function. Option bit not set in SINUMERIK to enable the required functionality. Program references a function or axis that has not been configured. Machine commissioning incomplete — required setup step was not performed. Configuration data cleared or lost due to a parameter reset or hardware change.

How do I fix Siemens SINUMERIK alarm 104001?

1. Read the full alarm message to identify what is missing (axis name, parameter number, function name). 2. Consult the SINUMERIK alarm manual for alarm 104001 for the specific configuration requirement. 3. Check the relevant machine data group and set the required parameter. 4. If a specific option is required, verify it is licensed and enabled in the SINUMERIK option settings. 5. Power cycle after making configuration changes to apply the new settings.

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Siemens SINUMERIK Controller

Program/G-code · Intermediate · 30-120 minutes

Alarm 104001

Siemens 840D 104001 - No additional tools available

Alarm 104001 occurs when the tool management system has reached its configured limit for additional tools or cannot allocate tool memory slots. This typically happens when attempting to load a new tool into the tool management while all available tool locations are already occupied, or when the tool management configuration limits have been exceeded.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104001

Siemens 840D 104001 - No additional tools available

No additional tools available

Root Cause Summary

Alarm 104001 occurs when the tool management system has reached its configured limit for additional tools or cannot allocate tool memory slots. This typically happens when attempting to load a new tool into the tool management while all available tool locations are already occupied, or when the tool management configuration limits have been exceeded.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access tool management via HMI: Services > Tool Management > Tool List. Review all loaded tools and their status.
2
Check machine data MD18102 $MN_MM_NUM_TOOL (number of tools) and MD18104 $MN_MM_NUM_CUTTING_EDGES_IN_TOA (cutting edges) to determine configured limits.
3
Delete unused, duplicate, or obsolete tools from the tool list to free up tool management slots. Document removed tools before deletion.
Ensure tools being deleted are not currently in use or referenced in active NC programs
4
Reset the alarm and restart the NC program. If persistent, consider increasing MD18102 value if system license allows.

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