What causes Siemens SINUMERIK alarm 104204?

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 104204?

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 104204 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 104204

Siemens 840D 104204 - No new tool created

Alarm 104204 occurs when the system attempts to create a new tool in the tool management system but fails due to configuration limitations or memory constraints. This typically happens when the maximum number of tools has been reached, tool management parameters are incorrectly configured, or there is insufficient memory allocated for tool data storage.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104204

Siemens 840D 104204 - No new tool created

No new tool created

Root Cause Summary

Alarm 104204 occurs when the system attempts to create a new tool in the tool management system but fails due to configuration limitations or memory constraints. This typically happens when the maximum number of tools has been reached, tool management parameters are incorrectly configured, or there is insufficient memory allocated for tool data storage.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access HMI and navigate to Tools → Tool List to check current number of active tools in the system.
2
Check machine data MD18118 $MN_MM_NUM_TOOL (maximum number of tools) and MD18126 $MN_MM_NUM_CUTTING_EDGES_IN_TOA (cutting edges) to verify configured limits.
3
Delete unused or obsolete tools from the tool list to free up capacity, or increase MD18118 value if system memory allows.
Changing MD18118 requires a control reboot and may affect memory allocation. Ensure sufficient system resources before modification.
4
Perform a control restart (power cycle) after any machine data changes and verify tool creation now succeeds.

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