: The most frequent cause is a lack of motor data identification and static optimization, particularly with asynchronous motors. Mechanical Overload

| Root Cause | Solution | |------------|----------| | PLC in STOP | Set PLC to RUN or reconfigure drive to ignore missing telegram ( p2040 = 0 – not recommended for safety) | | p2040 too short | Increase p2040 to at least 2–3× bus cycle time | | Loose connector | Reseat or replace bus connector | | Wrong telegram type | Match p0922 with PLC configuration (e.g., standard telegram 1 for speed control) | | No termination | Activate termination on both ends of PROFIBUS segment | | EMI | Check cable routing, add ferrites, verify shield grounded at both ends | | Faulty option board | Replace communication board (e.g., CBE20 for PROFINET) |

I can then provide the precise parameter steps for your scenario. sinamics drive motor fault 7902 - SiePortal - Siemens

A automotive paint line conveyor trips with F07902 every Monday morning but runs fine for the rest of the week.

The drive was not properly tuned to the motor.

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Siemens Drive Fault — Code 7902

: The most frequent cause is a lack of motor data identification and static optimization, particularly with asynchronous motors. Mechanical Overload

| Root Cause | Solution | |------------|----------| | PLC in STOP | Set PLC to RUN or reconfigure drive to ignore missing telegram ( p2040 = 0 – not recommended for safety) | | p2040 too short | Increase p2040 to at least 2–3× bus cycle time | | Loose connector | Reseat or replace bus connector | | Wrong telegram type | Match p0922 with PLC configuration (e.g., standard telegram 1 for speed control) | | No termination | Activate termination on both ends of PROFIBUS segment | | EMI | Check cable routing, add ferrites, verify shield grounded at both ends | | Faulty option board | Replace communication board (e.g., CBE20 for PROFINET) | siemens drive fault code 7902

I can then provide the precise parameter steps for your scenario. sinamics drive motor fault 7902 - SiePortal - Siemens : The most frequent cause is a lack

A automotive paint line conveyor trips with F07902 every Monday morning but runs fine for the rest of the week. The drive was not properly tuned to the motor

The drive was not properly tuned to the motor.