7902 [2021] — Siemens Drive Fault Code

: Incorrect motor phase lead connections or disconnected motor cables.

) is too short, or the torque limits are set too low to overcome initial friction. Phase Failure: siemens drive fault code 7902

: Acceleration torque (increase to provide more starting torque). r0949r 0949 : Fault value (interprets the exact cause of the stall). To help narrow down the solution, could you tell me: : Incorrect motor phase lead connections or disconnected

: Ensure your motor parameters (p304–p311) match the nameplate exactly. r0949r 0949 : Fault value (interprets the exact

In SINAMICS firmware versions (e.g., V4.7+), 7902 indicates that the has been interrupted or never established. The drive is configured for fieldbus control (e.g., P0700 = 6 for PROFIBUS, or P0922 telegram selected) but no valid cyclic data exchange is occurring.

: A faulty or incorrectly configured speed sensor/encoder can provide the wrong feedback to the speed controller. Current Limits : The set current limits ( p0640p 0640