Delta SToT fault code meaning
Delta / SToT
Series: MX300, VP3000
STO execution timeout
AC motor drive
Meaning: STO module execution exceeded the internal timer time
Possible causes
- Control board fault
- 8-116
Source: MX300 Series User Manual (DELTA_IA-MDS_MX300_UM_TC_20260226) P190; VP3000 Series User Manual (DELTA_IA-MDS_VP3000_UM_TC_20250523) P438