F1611 fault in Siemens V70 Drive

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F1611 fault in Siemens V70 Drive indicates a Safety Integrated (SI) Defect Detected on the Control Unit. This means the internal safety monitoring system found a critical fault and triggered a Safe Torque Off (STO) to protect the machine. Cause: The drive-integrated "Safety Integrated" (SI) function on the Control Unit (CU) has detected an error and initiated an STO.

Remedy:
  • Carry out a POWER ON (power off/on) for all components.
  • Upgrade software.
  • Replace the Control Unit.

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