Siemens A31940 fault code meaning
Siemens / A31940
Series: G120-CU240B-E-2, G120-CU250S-2, S120-S150
Encoder 1: Spindle sensor S1 voltage error
converter
Meaning: The voltage of the spindle's analog sensor S1 is outside the permissible range.
Possible causes
Source: SINAMICS G120, control unit CU240B-2_CU240E-2 P789; SINAMICS G120, control unit CU250S-2 P1535; SINAMICS S120_S150 P3022
Series: S110
Encoder 1: Incorrect spindle clamping status
servo drive
Meaning: The spindle clamping status is incorrect.
Possible causes
Source: SINAMICS S110 P1146
Series: S220
Motor encoder: Spindle sensor S1 voltage error
converter
Meaning: The voltage of the spindle's analog sensor S1 is outside the permissible range.
Possible causes
Source: SINAMICS S220 converter P2559