STO input mismatch (_ecSTO_INPUT_MISMATCH)

What does 10035 mean?

The drive has detected an inconsistency in its internal Safe Torque Off (STO) registers, meaning the two redundant STO inputs are not in the same state. This is a safety fault that can occur whether the drive is enabled or disabled, indicating a potential failure in the safety circuit or a timing issue, which compromises the STO function.

Complete Troubleshooting Guide

1. 1

   Using a multimeter, physically check both STO inputs on the drive to confirm they are in the exact same electrical state (e.g., both energized or both de-energized).

2. 2

   Inspect the safety circuit wiring for any loose connections, broken wires, or faulty safety devices that might cause a state discrepancy.

3. 3

   If there are slight timing discrepancies in the connected safety circuit, consider adjusting the STOMISMATCHTIME parameter to tolerate the delay.