Siemens SINUMERIK codes
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Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-60 minutes

Alarm 61606

Siemens 840D 61606 - Channel block: Error during contour preparation

An error has been found on conditioning the contour. This alarm is always related to one of NCK alarms 10930.10934, 15800 or 15810. Alarm triggered by following cycle: CYCLE95. Remedy: Check contour subroutine.

Siemens SINUMERIKServo/AxisIntermediate30-60 minutes

61606

Siemens 840D 61606 - Channel block: Error during contour preparation

Channel block: Error during contour preparation

An error has been found on conditioning the contour. This alarm is always related to one of NCK alarms 10930.10934, 15800 or 15810. Alarm triggered by following cycle: CYCLE95. Remedy: Check contour subroutine.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Common Causes

  • Malformed or incomplete contour subroutine geometry definition
  • Invalid G-code syntax in contour preparation blocks
  • Contour violates machine kinematic or axis limits during conditioning
  • Incorrect contour data type or parameter passing to CYCLE95
  • Missing or conflicting tool offset compensation in contour path

Troubleshooting Steps

  1. 1Review the contour subroutine code for syntax errors, missing endpoints, or invalid coordinate values
  2. 2Cross-reference the related NCK alarm (10930-10934, 15800, or 15810) in the machine diagnostics to identify the specific conditioning failure
  3. 3Verify the contour geometry is geometrically closed and does not exceed machine travel limits or cause axis singularities
  4. 4Test the contour subroutine in manual mode or with a simplified geometry to isolate the problematic segment
  5. 5Check tool offset, scaling, and mirroring parameters used during CYCLE95 execution for consistency with contour definition

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