What causes Siemens SINUMERIK alarm 101500?

Required machine data or parameter not configured for the requested function. Option bit not set in SINUMERIK to enable the required functionality. Program references a function or axis that has not been configured. Machine commissioning incomplete — required setup step was not performed. Configuration data cleared or lost due to a parameter reset or hardware change.

How do I fix Siemens SINUMERIK alarm 101500?

1. Read the full alarm message to identify what is missing (axis name, parameter number, function name). 2. Consult the SINUMERIK alarm manual for alarm 101500 for the specific configuration requirement. 3. Check the relevant machine data group and set the required parameter. 4. If a specific option is required, verify it is licensed and enabled in the SINUMERIK option settings. 5. Power cycle after making configuration changes to apply the new settings.

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Siemens SINUMERIK Controller

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

Alarm 101500

Siemens 840D 101500 - No other drives possible; option not set.

Alarm 101500 occurs when attempting to activate or configure additional drive axes beyond the licensed capacity of the SINUMERIK 840D system. The NCK software detects that the hardware configuration or axis assignment exceeds what is permitted by the installed option licenses.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

101500

Siemens 840D 101500 - No other drives possible; option not set.

No other drives possible; option not set.

Root Cause Summary

Alarm 101500 occurs when attempting to activate or configure additional drive axes beyond the licensed capacity of the SINUMERIK 840D system. The NCK software detects that the hardware configuration or axis assignment exceeds what is permitted by the installed option licenses.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Navigate to HMI: Startup -> Service -> System Data -> License to check currently installed options and axis count.
2
Compare licensed axis count with machine data MD10000 $MN_AXCONF_MACHAX_USED and MD10010 $MN_AXCONF_SPINDLE_USED to verify configuration matches license.
3
If additional axes are required, contact Siemens to purchase and install appropriate license upgrade with extended axis option.
Never attempt to modify license files manually - this will cause system failure.
4
After license installation, perform NCK reset (Power Off -> On) and verify alarm clears during startup.

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