Siemens F07937 fault code meaning

Series: G220, S220

Drive: Speed deviation between motor model and external speed

converter

Meaning: The absolute speed difference between the two actual values (r2169, r1443) exceeded the tolerance threshold (p3236) for longer than the time set in p3238. Possible causes: - Incorrect connection or calibration of the external encoder signal (c1440, p2000). - The speed encoder supplying the external encoder signal is damaged. - Incorrect encoder signal polarity or gain. - The smoothing time constant for the monitored model speed is too large (p2157). - The monitoring smoothing time constant or threshold is too small (p3236, p3238). If no external encoder signal is used: Check the speed encoder if the signal ripple is high. See also: p2149 (Monitoring configuration)

Possible causes

Source: SINAMICS G220 Converter P1380; SINAMICS S220 Converter P2369