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Siemens SINUMERIK Controller
Servo/Axis · Advanced · 45 - 120 minutes
Siemens 25001 - Axis hardware fault of passive encoder
SIEMENS alarm 25001 Drive Configuration Error occurs when there is a mismatch between the drive parameters stored in the NCK and the actual drive configuration, or when drive-specific parameters in MD30xxx series are incorrectly set. This typically happens after drive replacement, parameter restoration, or when DRIVE-CLiQ topology changes are not properly synchronized with the control system.
Siemens 25001 - Axis hardware fault of passive encoder
Axis hardware fault of passive encoder
Siemens SINUMERIK alarm 25001: Axis hardware fault of passive encoder. Detailed remedy is being verified against the current Siemens diagnostics manual.
Root Cause Summary
SIEMENS alarm 25001 Drive Configuration Error occurs when there is a mismatch between the drive parameters stored in the NCK and the actual drive configuration, or when drive-specific parameters in MD30xxx series are incorrectly set. This typically happens after drive replacement, parameter restoration, or when DRIVE-CLiQ topology changes are not properly synchronized with the control system.
Safety
Causes and Fixes
Access Drive Diagnostics
Navigate to Diagnostics > Drive > Overview and check drive status. Compare displayed drive type with MD30130 (drive type) setting.
Use DRIVE-CLiQ topology display to verify physical drive matches configuration
Perform Drive Detection
Go to Commissioning > Drive > Automatic Drive Detection. Execute drive scan to update MD30xxx parameters automatically.
Ensure all drives are properly connected before running detection
Verify Critical Drive Parameters
Check MD30130 (drive type), MD30131 (drive version), and MD30132 (drive configuration) match the installed hardware specifications.
Cross-reference with drive nameplate data for exact model verification
Reset and Restart NCK
Perform NCK reset via HMI > Diagnostics > NCK > Reset, then restart system to apply new drive configuration.
Save all program data before NCK reset
Call a technician if:
Prevention
Common Mistakes
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