What causes Siemens SINUMERIK alarm 104125?

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 104125?

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 104125 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 104125

Siemens 840D 104125 - PA: Next tool has no cutting edges

Alarm 104125 occurs when the control system detects that the next tool programmed for use has zero cutting edges defined in the tool management data. This typically happens when tool data is incomplete, improperly configured, or the wrong tool number is called in the NC program.

Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

104125

Siemens 840D 104125 - PA: Next tool has no cutting edges

PA: Next tool has no cutting edges

Root Cause Summary

Alarm 104125 occurs when the control system detects that the next tool programmed for use has zero cutting edges defined in the tool management data. This typically happens when tool data is incomplete, improperly configured, or the wrong tool number is called in the NC program.

Safety

Refer to Siemens documentation
Ensure qualified technician performs repairs

Causes and Fixes

1
Identify the tool number causing the alarm from the alarm detail display or NC program block shown on screen.
2
Access tool management (Offset menu or TOA table) and locate the problematic tool number.
3
Check the CE (Cutting Edges) parameter field - verify it shows a valid value (typically 1 or greater, depending on tool type).
4
Enter the correct number of cutting edges for the tool (e.g., 1 for single-point tools, 2-4 for drills, or actual edge count for indexable tools) and reset the alarm.
Ensure the cutting edge count matches the physical tool configuration to prevent incorrect tool life monitoring.

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