7902 - Siemens Drive Fault Code

According to Siemens Support , you should follow these steps to resolve the fault:

The F07902 fault occurs when the difference between the set speed and actual speed exceeds the tolerance for a specific time limit.

(identification at standstill). This helps the drive calculate the correct control parameters. Check Mechanical Integrity: siemens drive fault code 7902

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

, this fault is frequently tied to asynchronous motors that haven't undergone proper static optimization. You can view the specific fault history and timestamps using the Siemens STARTER software TIA Portal specific parameter numbers for a particular Siemens drive series, like the According to Siemens Support , you should follow

Option 2: Technical/Deep Dive (Best for a Blog or internal wiki)

: Ensure the input voltage is stable, as a significant voltage drop can reduce the motor's available torque. Check Mechanical Integrity: ) is too short, or

: Double-check the following parameters against the actual motor nameplate: (Rated voltage) (Rated current) (Rated power) (Rated speed)