What causes Siemens SINUMERIK alarm 104028?

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 104028?

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 104028 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 104028

Siemens 840D 104028 - Error on accessing general tool data

Alarm 104028 occurs when the control system cannot properly access or read general tool data from the tool management system. This typically results from missing tool data entries, corrupted tool database, incorrect T-number references in the NC program, or communication errors between the NCK and the tool management database.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104028

Siemens 840D 104028 - Error on accessing general tool data

Error on accessing general tool data

Root Cause Summary

Alarm 104028 occurs when the control system cannot properly access or read general tool data from the tool management system. This typically results from missing tool data entries, corrupted tool database, incorrect T-number references in the NC program, or communication errors between the NCK and the tool management database.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Identify the exact tool number that triggered the alarm from the alarm detail or NC program line displayed on the control.
2
Navigate to the tool list: Press OFFSET key → Tool List → Check if the referenced tool number exists in the general tool data table.
3
If tool is missing, create a new tool entry with correct tool number and populate mandatory general tool data fields (tool type, geometry, etc.).
4
Reset the alarm and restart the NC program to verify the tool can now be accessed properly.

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