Value Difference Too High

What does E3-311 mean?

The measured value on an I/O bus module channel exceeds the configured tolerance window compared to an expected or redundant value. This indicates a potential sensor malfunction, wiring issue, or an incorrectly set tolerance. It can lead to false alarms or inaccurate process control.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify the sensor configuration and functionality for accuracy and ensure proper calibration.

2. 4

   Compare the sensor reading with a reliable external measurement to confirm accuracy.