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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 100304 - not found.
SIEMENS alarm 100304 '%1' not found occurs when the SINUMERIK system cannot locate a referenced object, typically an axis identifier, drive object, or configuration parameter. This servo alarm indicates a mismatch between the NC program or configuration references and the actual hardware/software configuration in the system.
100304
Siemens 840D 100304 - not found.
not found.
Siemens SINUMERIK alarm 100304: '' not found. This alarm indicates an error condition in the NC program or control configuration that must be resolved before the operation can continue.
Root Cause Summary
SIEMENS alarm 100304 '%1' not found occurs when the SINUMERIK system cannot locate a referenced object, typically an axis identifier, drive object, or configuration parameter. This servo alarm indicates a mismatch between the NC program or configuration references and the actual hardware/software configuration in the system.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Check axis configuration in HMI
Navigate to Commissioning > Drive > Axis overview and verify all referenced axes are present and properly named.
Use the axis list display to cross-reference with your NC program axis calls
- 2
Verify machine data MD30100
Check MD30100 AXCONF_MACHAX_NAME_TAB entries match the axis names used in your NC program or configuration.
Backup machine data before making changes
- 3
Validate DRIVE-CLiQ topology
In Commissioning > Drive > Topology, ensure all configured axes have valid DRIVE-CLiQ connections and are recognized by the system.
- 4
Perform axis assignment check
Verify MD30130 AXCONF_LOGIC_MACHAX_TAB contains correct logical axis assignments for all referenced axes.
Call a technician if:
- ·DRIVE-CLiQ hardware failures detected
- ·Multiple drive objects missing after topology scan
- ·System memory errors present
Prevention
- Regular backup of machine data and configuration
- Document all axis and drive naming conventions
- Verify configuration after any hardware changes
Common Mistakes
- Assuming axis names are case-insensitive
- Forgetting to update NUM_SPINDLES after spindle changes
- Not performing topology scan after drive hardware replacement
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