Applicable Systems
GA700
GA500
A1000
V1000
J1000
Symptoms
Safe Torque Off activated: safety function engaged.
Possible Causes
- STO input activated
- Safety command received
- Emergency stop triggered
Troubleshooting Steps
- Step 1: Check STO input signal
STO input inactive when safe - Step 2: Verify emergency stop circuit
Circuit normal - Step 3: Clear safety command
Command cleared
How to Reset
Reset by clearing STO command and acknowledging fault.
Source: Yaskawa GA700 Technical Manual, Yaskawa Electric
Category: PLC & VFD