STo · GA800 · Alarm
For STo · GA800 · Alarm, brand is Yaskawa; model / series is GA800; fault code is STo; fault name is Safe Torque OFF; type is Alarm, verified against its source on 2026-09-01.
- Brand
- Yaskawa
- Model / series
- GA800
- Fault code
- STo verified
- Fault name
- Safe Torque OFF verified
- Type
- Alarm verified
- Cause
- Safe Disable inputs H1-HC and H2-HC are open. verified
- Corrective action
- • Make sure that the Safe Disable signal is input from an external source to terminal H1-HC and H2-HC. • When the Safe Disable function is not in use, use a jumper to connect terminals H1-HC and H2-HC. verified
What the source says
STo (003C) Safe Torque OFF - Alarm 133
— yaskawa.com, retrieved 2026-09-01
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
Cause
Safe Disable inputs H1-HC and H2-HC are open.
Corrective action
• Make sure that the Safe Disable signal is input from an external source to terminal H1-HC and H2-HC. • When the Safe Disable function is not in use, use a jumper to connect terminals H1-HC and H2-HC.
— all from yaskawa.com, retrieved 2026-09-01
Source
- yaskawa.comhttps://www.yaskawa.com/delegate/getAttachment?documentId=TOEPYAIGA8001&cmd=documents&documentName=TOEPYAIGA8001.pdf