_verified_: Siemens Drive Fault Code 7902

Subject: G120XA solution to warning F7902 motor out of step - Siemens

| Cause | Description | |-------|-------------| | PLC stop | Controller switched to STOP mode, stopped sending cyclic data | | Cable issue | PROFIBUS/PROFINET cable disconnected, damaged, or poorly terminated | | Connector fault | Loose or broken fieldbus connector (especially PROFIBUS 9-pin D-sub) | | Configuration mismatch | Telegram configuration (e.g., telegram type, length) differs between drive and PLC | | Bus overload | Excessive bus cycle time or high bus load causing intermittent telegrams | | Parameter error | p2040 (telegram monitoring time) set too low | | Master failure | Fieldbus master (PLC) power cycle or hardware fault | | Interference | Electromagnetic interference (EMI) on bus cable | siemens drive fault code 7902

The drive's parameters do not match the actual motor (e.g., rated current, power factor, or resistance). Incomplete Identification: Subject: G120XA solution to warning F7902 motor out

Troubleshooting Siemens Drive Fault Code 7902: Motor Stalled (F07902) What Does Fault 7902 Mean

If the fault occurs when trying to start a motor that is already spinning (coasting), enable the "Flying Restart" function ( Adjust Fault Limits:

Manually input the parameters exactly as written on the motor's rating plate: Rated Motor Voltage p305: Rated Motor Current p307: Rated Motor Power p308: Rated Motor CosPhi p311: Rated Motor Speed 4. Optimize the Motor

This article provides a comprehensive guide to understanding, diagnosing, and resolving Siemens fault code 7902. What Does Fault 7902 Mean?