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.

• Internal component failure (e.g., relay, semiconductor switch) within the drive's STO safety circuit.
• Over-voltage or transient spike affecting the drive's internal STO power supply, causing a component breakdown.
• Age-related degradation of internal STO components, leading to a deviation from expected performance.
• Manufacturing defect in the drive's STO hardware, causing an unexpected fault assertion.

Click steps to track your progress.

1. 1

   Cycle power to the drive (power off, wait 30 seconds, power on) to attempt a reset of the internal STO hardware.

2. 2

   Check the drive's environmental conditions, specifically for excessive heat or humidity that might stress internal components.

3. 3

   Verify the incoming power supply quality to the drive, looking for over-voltage conditions or excessive transients that could damage internal circuitry.

4. 4

   If the fault persists after power cycling and environmental checks, contact technical support with the drive's serial number for potential hardware replacement.

5. 5

   Capture any available diagnostic logs or event recorders from the drive to provide to technical support for detailed analysis of the internal fault.