What causes Siemens SINUMERIK alarm 104111?

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 104111?

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 104111 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 104111

Siemens 840D 104111 - PA: Error on reading number of tools

Alarm 104111 occurs when the control system encounters an error while attempting to read the number of tools from the tool management system during program execution. This typically indicates a problem with NC program syntax related to tool data retrieval, corrupted tool management data, or a mismatch between the requested tool data and the actual tool magazine configuration.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104111

Siemens 840D 104111 - PA: Error on reading number of tools

PA: Error on reading number of tools

Root Cause Summary

Alarm 104111 occurs when the control system encounters an error while attempting to read the number of tools from the tool management system during program execution. This typically indicates a problem with NC program syntax related to tool data retrieval, corrupted tool management data, or a mismatch between the requested tool data and the actual tool magazine configuration.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Stop the program and review the NC code at the line where the alarm occurred. Check for commands reading tool data (e.g., $TC_TP1, $TC_TP2, or custom tool count variables).
2
Verify the syntax of any tool management system variables or functions being accessed. Ensure proper use of $TC_MCP array indices and that the magazine number reference is valid.
3
Check if the program is attempting to read beyond the configured tool magazine capacity. Compare requested tool positions against MD18118 (MM_NUM_TOOL).
4
Correct the NC program syntax, verify with a dry run in single block mode, and reset the alarm using the DELETE key.

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