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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 100555 - Error TA: Branch point not found in
SIEMENS alarm 100555 indicates that the SINUMERIK system cannot locate a required branch point in the transformation (TA) configuration. This typically occurs when the kinematic transformation chain references a branch point that doesn't exist in the machine data or when there's a mismatch between the configured transformation structure and the actual kinematic model.
100555
Siemens 840D 100555 - Error TA: Branch point not found in
Error TA: Branch point not found in
Siemens SINUMERIK alarm 100555: Error TA: Branch point not found in. 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 100555 indicates that the SINUMERIK system cannot locate a required branch point in the transformation (TA) configuration. This typically occurs when the kinematic transformation chain references a branch point that doesn't exist in the machine data or when there's a mismatch between the configured transformation structure and the actual kinematic model.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Check kinematic chain configuration
Navigate to HMI → Commissioning → Machine → Kinematic transformation and verify MD24100 $MC_TRAFO_TYPE_x settings match your machine configuration.
Use the kinematic visualization tool in SINUMERIK Operate to verify the transformation chain structure
- 2
Verify branch point parameters
Check MD24110 $MC_TRAFO_CHAIN_x parameters to ensure all referenced branch points are properly defined with correct indices.
Backup machine data before making changes to transformation parameters
- 3
Validate transformation structure
Compare the kinematic model in MD24xxx with the actual machine structure, ensuring branch points correspond to physical pivot points or tool change positions.
- 4
Reset and reload transformation
Execute NC Reset and reload the transformation using G code TRAORI or through HMI → Machine → Transformation → Activate.
Call a technician if:
- ·Kinematic parameters require modification
- ·Machine geometry measurements needed
- ·Backup restoration fails
- ·Hardware configuration uncertainty
Prevention
- Always backup transformation data before software updates
- Document kinematic configuration changes
- Regularly verify transformation calibration
- Use SINUMERIK StartupTool for systematic configuration
Common Mistakes
- Modifying kinematic parameters without understanding machine geometry
- Importing incompatible transformation configurations
- Ignoring software version compatibility for kinematic models
- Not backing up working transformation before changes
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