Channel stuck-at error

What does 25 (Channel Stuck-at) mean?

An I/O channel is detected to be 'stuck' in a specific state, meaning its input signal is not changing as expected when it should. This indicates a potential wiring fault, sensor failure, or an internal issue with the I/O module. Such a condition compromises the reliability of the safety input and can lead to incorrect safety evaluations.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   If this error persists after troubleshooting, replace the I/O module as it may be internally defective.