What causes Siemens SINUMERIK alarm 104115?

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 104115?

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 104115 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

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

Alarm 104115

Siemens 840D 104115 - PA: Error on reading JOG feed unit

Alarm 104115 indicates that the control system cannot correctly read or interpret the JOG feedrate unit setting from the machine data or parameter configuration. This typically occurs when the JOG feed unit parameter (MD/SD) contains an invalid value, is corrupted, or is incompatible with the current axis configuration.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104115

Siemens 840D 104115 - PA: Error on reading JOG feed unit

PA: Error on reading JOG feed unit

Root Cause Summary

Alarm 104115 indicates that the control system cannot correctly read or interpret the JOG feedrate unit setting from the machine data or parameter configuration. This typically occurs when the JOG feed unit parameter (MD/SD) contains an invalid value, is corrupted, or is incompatible with the current axis configuration.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Access Commissioning mode and navigate to Machine Data. Check MD11310 $MN_JOG_REV_IS_ACTIVE and channel-specific JOG settings (SD41100-41110 range).
2
Verify that JOG feed unit values are set correctly: 0=mm/min or deg/min, 1=mm/rev or deg/rev. Ensure values match the axis type configuration.
Document current MD values before making changes. Incorrect settings may affect machine behavior.
3
If values appear corrupted or out of range, restore from a known good backup or reset to OEM default values for JOG-related machine data.
Always create a complete backup before restoring machine data.
4
Perform a Power ON reset (NCK reset) to reload machine data and verify alarm clears. Test JOG mode operation on all axes.

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