Delta STo1 fault code meaning
Delta / STo1
Series: MX300
Safe torque output stop 1
AC motor drive
Meaning: The action time difference between channels 1 and 2 is too large, and channel 1 is activated
Possible causes
- Problem with an external device on the channel
Source: MX300 Series User Manual (DELTA_IA-MDS_MX300_UM_TC_20260226) P191