Siemens SINUMERIK codes
AxisMD

axismd.ai

Siemens SINUMERIK Controller

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

Alarm 101631

Siemens 840D 101631 - Write access only in start-up state Ready (p10=0).

This alarm occurs when attempting to write or modify system data, machine data (MD), or setting data (SD) while the control is not in the proper startup state. The SINUMERIK 840D requires the control to be in a specific ready state with power-on parameter p10=0 to allow write access to protected system parameters.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

101631

Siemens 840D 101631 - Write access only in start-up state Ready (p10=0).

Write access only in start-up state Ready (p10=0).

Siemens SINUMERIK operator message 101631: Write access only in start-up state Ready (p10=0). 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 attempting to write or modify system data, machine data (MD), or setting data (SD) while the control is not in the proper startup state. The SINUMERIK 840D requires the control to be in a specific ready state with power-on parameter p10=0 to allow write access to protected system parameters.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Causes and Fixes

  1. 1

    Press the POWER ON button or key to fully power cycle the control system.

  2. 2

    During the boot sequence, access the Startup commissioning menu before the control completes full initialization.

    Timing is critical - access must occur within the startup window before p10 changes state.

  3. 3

    Verify you are in 'Ready' state by checking the startup parameter p10=0 in the system status display.

  4. 4

    Attempt the data write operation again. If successful, complete all necessary changes before exiting startup mode.

    All modified data will be validated upon exiting startup mode. Invalid entries may prevent control startup.

Service Recommended confidence

Seeing Multiple Alarms?

Seeing another alarm with this one? Enter the code.

Get machine-aware diagnosis

AxisMD logs alarms against your actual machines, tracks patterns, and gives AI context your manual doesn't have.

Start free

Was this guide helpful?

Always verify with your machine manual or a certified technician before performing service procedures.