The motor is running but cannot match the speed setpoint due to load or tuning. For detailed technical guides, engineers often refer to the Siemens Industry Online Support (SIOS) for a particular drive model like the sinamics drive motor fault 7902 - SiePortal - Siemens
The drive's parameters do not match the physical motor plate (incorrect siemens drive fault code 7902
Motor cables (U, V, W) are connected improperly, or the encoder signal is reversed (if applicable). Premature Startup: Motor excitation time ( p0346p 0346 The motor is running but cannot match the
Access fault buffer: r0947 lists last 8 faults. r0949 gives additional info (e.g., temperature at time of trip). This helps separate actual overheat from sensor failure. r0949 gives additional info (e
: Ensure your motor parameters (p304–p311) match the nameplate exactly.
The Siemens drive fault code indicates a "Motor Stalled" condition. This occurs when the drive detects that the motor speed is significantly below the expected setpoint while it is delivering maximum torque or current. Deep Technical Insight: Why it Occurs
This fault indicates that the drive has stopped receiving valid cyclic process data telegrams from the higher-level controller (PLC) within the configured monitoring time.