Siemens F31120 fault code meaning
Siemens / F31120
Series: G120-CU250S-2
Encoder 1: Supply voltage fault
converter
Meaning: Power supply error for encoder 1.
Possible causes
Source: SINAMICS G120, Control Unit CU250S-2 P1047
Series: G130-G150
Encoder 1: Power supply voltage
converter
Meaning:
Possible causes
Source: G150 P931
Series: S210
Encoder 1: Encoder supply voltage fault
servo drive
Meaning:
Possible causes
Source: SINAMICS S210_SIMOTICS S-1FK2 and S-1FT2 P928