Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Program/G-code · Intermediate · 30-120 minutes

Alarm 104234

Siemens 840D 104234 - Only memory block from 0..14 possible for NB

This alarm occurs when a program attempts to access or reference a block number (NB) with a memory block index outside the valid range of 0 to 14. The SINUMERIK 840D system limits NC program memory blocks accessible via the NB command to 15 blocks (0-14), and the programmed value exceeds this hardware/software limitation.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104234

Siemens 840D 104234 - Only memory block from 0..14 possible for NB

Only memory block from 0..14 possible for NB

Siemens SINUMERIK operator message 104234: Only memory block from 0.14 possible for NB. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.

Root Cause Summary

This alarm occurs when a program attempts to access or reference a block number (NB) with a memory block index outside the valid range of 0 to 14. The SINUMERIK 840D system limits NC program memory blocks accessible via the NB command to 15 blocks (0-14), and the programmed value exceeds this hardware/software limitation.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Causes and Fixes

  1. 1

    Note the exact line number and program name where the alarm occurred from the control display.

  2. 2

    Open the NC program in the editor and search for 'NB' commands with values greater than 14 (e.g., NB15, NB20, etc.).

  3. 3

    Correct the block number reference to use a value between 0 and 14, or restructure the program logic to avoid needing blocks beyond this range.

  4. 4

    Reset the alarm, reload the corrected program, and test in single block mode to verify proper execution.

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