Yaskawa GA700 AC

1 fault code documented

SToF

Safe Disable Signal Fault

This fault indicates an inconsistency in the Safe Disable input channels (H1-HC and H2-HC), where one channel is open and the other is short-circuited. This condition signals a potential issue or damage within either the Safe Disable circuit or the drive itself, which compromises the 'Safe Torque Off' safety function. It requires immediate troubleshooting to restore the safety integrity of the system.