Ensure the encoder feedback direction matches the motor rotation direction; an inverted signal will look like a stall to the drive. If you'd like to troubleshoot further, let me know: The exact drive model (e.g., G120, S120, or V90).
| Cause | Explanation | |-------|-------------| | | KTY84 or PT100 open circuit. Drive interprets infinite resistance as overtemperature. | | Short circuit | Short across sensor leads = zero resistance, also interpreted as fault. | | Wrong sensor type configured | Parameter p0600 (temperature sensor type) set to “no sensor” but sensor wired, or vice versa. | | Sensor connected to wrong terminals | Example: KTY connected to terminals for PTC thermistor. | | Faulty sensor | Internal damage to the thermistor or RTD. | | EMI interference | Noisy signal lines cause erratic resistance readings. | siemens drive fault code 7902
Are you using or is it in sensorless (V/f) control? sinamics drive motor fault 7902 - SiePortal - Siemens Ensure the encoder feedback direction matches the motor