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Siemens SINUMERIK Controller
Servo/Axis · Intermediate · 20-45 minutes
Siemens 840D 61517 - Channel block: Angle of inclined grinding wheel missing
The alarm can be triggered by the following grinding cycle: CYCLE416 Remedy: Enter angle under $TC_TPG8
61517
Siemens 840D 61517 - Channel block: Angle of inclined grinding wheel missing
Channel block: Angle of inclined grinding wheel missing
The alarm can be triggered by the following grinding cycle: CYCLE416 Remedy: Enter angle under $TC_TPG8
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Common Causes
- Missing or undefined angle parameter in $TC_TPG8 for the grinding wheel tool offset
- Incorrect tool table configuration for grinding cycle CYCLE416
- Tool offset data not properly loaded or initialized in the CNC memory
- Mismatch between selected tool and configured grinding wheel parameters
Troubleshooting Steps
- 1Verify that $TC_TPG8 parameter contains a valid angle value for the inclined grinding wheel; check tool table entries for the active tool
- 2Navigate to the tool offset/tool data screen and confirm all grinding wheel geometry parameters are populated, including the angle specification
- 3Re-select and re-assign the grinding tool in the part program to ensure proper tool offset linkage and parameter inheritance
- 4Run a test block with CYCLE416 after parameter correction to confirm alarm clears and cycle executes properly
- 5If alarm persists, check CNC system logs and backup/restore tool table data from a known working configuration
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