Delta STOT fault code meaning
Delta / STOT
Series: VP3000-E
STO execution timeout
AC motor drive
Meaning: STO module execution exceeded the internal timer time limit.
Possible causes
- Control board fault
Source: VP3000-E & VP3000-EHS User Manual (DELTA_IA-MDS_VP3000-E-VP3000-EHS_UM_SC_20260306) P403