What causes Siemens SINUMERIK alarm 104254?

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 104254?

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 104254 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

Tool Changer · Intermediate · 30-120 minutes

Alarm 104254

Siemens 840D 104254 - Illegal magazine or location number

Alarm 104254 occurs when the NC program references a tool magazine number or location number that does not exist in the machine configuration or exceeds the defined limits. This typically happens due to incorrect T-number programming, misconfigured machine data for the tool changer, or attempting to access a magazine/pocket that is not defined in the system.

Siemens SINUMERIKTool ChangerIntermediate30-120 minutes

104254

Siemens 840D 104254 - Illegal magazine or location number

Illegal magazine or location number

Root Cause Summary

Alarm 104254 occurs when the NC program references a tool magazine number or location number that does not exist in the machine configuration or exceeds the defined limits. This typically happens due to incorrect T-number programming, misconfigured machine data for the tool changer, or attempting to access a magazine/pocket that is not defined in the system.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Review the NC program line where the alarm occurred and identify the T-number or magazine reference that triggered the alarm.
2
Check machine data MD18090 (MM_NUM_MAGAZINE) and MD18092 (MM_NUM_TOOL_LOCATION) to verify the maximum configured magazine numbers and locations available.
3
Cross-reference the programmed tool number with the tool management list (offset tables) to ensure the tool location assignment is within valid range.
4
Correct the NC program to use valid magazine and location numbers within the configured limits, or reassign the tool to a valid location in the tool management system.

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