Channel stuck-at error

What does 25 mean?

A safety I/O channel is detected to be 'stuck' in a fixed state (e.g., permanently ON or OFF) and does not respond to changes as expected. This suggests a potential internal fault within the I/O module or an external wiring issue causing the channel to be latched. This is a severity 3 error.

• Analog input channel is not changing its value.
• Sensor connected to the channel is stuck.
• Fault in the analog-to-digital converter (ADC).
• Configuration error for the input channel.

Click steps to track your progress.

1. 1

   Check the wiring connected to the I/O module channel for any shorts to power, ground, or open circuits.

2. 2

   Perform a restart of the I/O module to reset its internal state.

3. 3

   If the error persists after verifying wiring and restart, replace the I/O module.