What causes Siemens SINUMERIK alarm 104209?

Part program contains an illegal or unsupported command for the current machine configuration. Parameter or machine data setting incompatible with the commanded operation. Required option or function not enabled on this SINUMERIK control. Incorrect axis assignment or configuration for the commanded function. Software version or compile cycle version mismatch.

How do I fix Siemens SINUMERIK alarm 104209?

1. Note the full alarm message including any parameter values shown (e.g., axis number, block number, channel). 2. Identify the program block or operation that triggered the alarm. 3. Review the SINUMERIK alarm manual for alarm 104209 to identify the specific cause and remedy. 4. Check the relevant machine data parameters referenced in the alarm. 5. If the alarm persists after correcting the program, contact Siemens technical support with the full alarm text and machine data backup.

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Siemens SINUMERIK Controller

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

Alarm 104209

Siemens 840D 104209 - Dummy tool cannot be created

Alarm 104209 occurs when the control system attempts to create a dummy tool in the tool management system but fails due to configuration limitations, memory constraints, or tool data conflicts. This typically happens when the maximum number of tools has been reached, the tool management configuration is incorrect, or there are issues with the tool data initialization process.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104209

Siemens 840D 104209 - Dummy tool cannot be created

Dummy tool cannot be created

Root Cause Summary

Alarm 104209 occurs when the control system attempts to create a dummy tool in the tool management system but fails due to configuration limitations, memory constraints, or tool data conflicts. This typically happens when the maximum number of tools has been reached, the tool management configuration is incorrect, or there are issues with the tool data initialization process.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access HMI Service mode and navigate to Settings > Tool Management > Tool List to check current tool count and available slots.
2
Check machine data MD18320 $MN_MM_NUM_TOOL (maximum number of tools) and MD18330 $MN_MM_NUM_MAGAZINE (magazine capacity) to verify configured limits.
3
Delete unused, duplicate, or obsolete tools from the tool list to free up tool slots for dummy tool creation.
Always backup tool data before deletion. Document removed tools for inventory purposes.
4
If legitimate tools fill all slots, increase MD18320 value if system license and memory allow, then perform control reboot for changes to take effect.
Increasing tool count may require license upgrade. Consult Siemens documentation for your specific control version.

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