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Siemens SINUMERIK Controller
Probing · Intermediate · 30-120 minutes
Siemens 840D 61427 - Channel block: Tool data of the active workpiece probe incorrect
Alarm 61427 fires when CYCLE996 (workpiece probe measuring cycle) executes with invalid tool data in the active probe definition. The NCK detects either an inactive probe tool or a zero length offset (L1=0) in the tool geometry data, preventing accurate workpiece measurements.
61427
Siemens 840D 61427 - Channel block: Tool data of the active workpiece probe incorrect
Channel block: Tool data of the active workpiece probe incorrect
Siemens SINUMERIK alarm 61427: Channel block: Tool data of the active workpiece probe incorrect. This alarm indicates a fault or error condition on the SINUMERIK 840D control. Refer to the Siemens SINUMERIK alarm documentation for the complete description and remedy.
Root Cause Summary
Alarm 61427 fires when CYCLE996 (workpiece probe measuring cycle) executes with invalid tool data in the active probe definition. The NCK detects either an inactive probe tool or a zero length offset (L1=0) in the tool geometry data, preventing accurate workpiece measurements.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Navigate to Siemens 840D HMI: Diagnostics > Tool Management or use the Programming menu to access the active tool table.
- 2
Locate the workpiece probe tool number used in the CYCLE996 call (check the part program for T and D calls). Verify the tool status field shows 'Active' or '1'.
Check MD 36000 (Tool management type) to confirm tool table structure.
- 3
If inactive, activate the probe tool by editing its status flag to active. Save changes and restart the NC program.
- 4
Verify probe tool offset activation: Confirm the D-offset is loaded before CYCLE996 execution using NC status display or trace function.
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