Siemens SINUMERIK codes
AxisMD

axismd.ai

Siemens SINUMERIK Controller

Servo/Axis · Intermediate · 30-120 minutes

Alarm 75609

Siemens 840D 75609 - Channel RESU: POS axis not permitted, axis type, block no.

Alarm 75609 occurs when a geometry axis (typically X, Y, or Z) is commanded with a positioning (RESU) instruction while Continuous-path Contour Preparation with Rotary-axis Representation (CC_RREPRE) is active. The NCK prevents this operation because geometry axes cannot perform independent positioning moves during active contour preparation modes that require coordinated rotary-axis interpolation.

Siemens SINUMERIKServo/AxisIntermediate30-120 minutes

75609

Siemens 840D 75609 - Channel RESU: POS axis not permitted, axis type, block no.

Channel RESU: POS axis not permitted, axis type, block no.

Siemens SINUMERIK alarm 75609: Channel RESU: POS axis not permitted, axis type, block no. 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 75609 occurs when a geometry axis (typically X, Y, or Z) is commanded with a positioning (RESU) instruction while Continuous-path Contour Preparation with Rotary-axis Representation (CC_RREPRE) is active. The NCK prevents this operation because geometry axes cannot perform independent positioning moves during active contour preparation modes that require coordinated rotary-axis interpolation.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Causes and Fixes

  1. 1

    Verify NC program logic: check if RESU block for geometry axis (e.g., 'RESU X100') appears after CC_RREPRE activation without prior mode cancellation (e.g., CYCOF or G00/G01 override).

    Review entire program context around the error block number provided in alarm %3.

  2. 2

    Issue CYCOF or equivalent cycle-off command before RESU geometry axis moves, or use G00/G01 rapid/linear positioning to implicitly cancel CC_RREPRE mode.

  3. 3

    Check MD 24140 (InterpolationMode) and MD 24150 (ContourPreparationMode) on the affected channel to confirm CC_RREPRE parameters are correctly configured for your application.

  4. 4

    Consult NCK parameter menu: Diagnosis → Channel → Interpolation Modes to verify mode transition logic and confirm CYCOF or mode-exit is programmed.

Service Recommended confidence

Seeing Multiple Alarms?

Seeing another alarm with this one? Enter the code.

Get machine-aware diagnosis

AxisMD logs alarms against your actual machines, tracks patterns, and gives AI context your manual doesn't have.

Start free

Was this guide helpful?

Always verify with your machine manual or a certified technician before performing service procedures.