STO hardware fault (_ecSTO_HARDWARE_FAULT)

What does 10034 mean?

This fault signals an internal hardware malfunction within the Safe Torque Off (STO) circuits, indicated by the assertion of one or both internal fault circuit outputs. This is a critical safety-related fault, occurring regardless of whether the drive is enabled or disabled, and means the STO function cannot be relied upon, risking uncontrolled torque.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   As a secondary check, still verify external STO input wiring and safety circuits, as external conditions might sometimes influence internal fault detection.