Siemens SINUMERIK codes
Siemens SINUMERIKTool ChangerIntermediate30-120 minutes

104251

Siemens 840D 104251 - Only one magazine available !

Only one magazine available !

Siemens SINUMERIK operator message 104251: Only one magazine available!. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.

Root Cause Summary

Alarm 104251 indicates that the CNC system has detected only one tool magazine is available or configured when the program or operation requires access to multiple magazines. This typically occurs when attempting to execute tool management functions that reference a second magazine that is either not configured, not enabled, or physically unavailable in the system.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Causes and Fixes

  1. 1

    Access machine data and check MD18086 $MN_MM_NUM_MAGAZINE to verify the number of configured magazines (should be 1 if only one magazine exists).

  2. 2

    Review MD18088 $MN_MM_NUM_TOOL_MANAGEMENT to confirm tool management configuration matches physical machine setup.

  3. 3

    If second magazine is not needed, modify the part program to remove references to magazine 2 or change tool calls to magazine 1.

  4. 4

    If second magazine should exist, contact machine tool builder for proper machine data configuration and PLC adaptations required for dual magazine operation.

    Incorrect machine data modification can cause system malfunction. Document original values before changes.

Service Recommended confidence

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