Signal supervision 3

What does 80B2 mean?

A fault generated by the signal supervision 3 function, indicating that a monitored signal has violated its defined limits or conditions. This signifies an abnormal condition in a specific process signal that the drive is supervising. Unresolved, it can lead to incorrect operation or safety issues.

• A second critical process sensor (e.g., temperature, level) is outputting a value beyond its configured operational thresholds.
• Intermittent connection or high resistance in the signal path from the monitored sensor to the drive's I/O terminal (e.g., X1:AI2).
• Parameter settings for the specific signal's high or low limits (e.g., P3-20 'AI2 min limit') are too tight for normal process variations.
• Electromagnetic interference (EMI) from nearby power cables or contactors inducing noise on the unprotected analog input line.

Click steps to track your progress.

1. 1

   1. Compare the actual process value (e.g., temperature) to the configured limits in drive parameter group P3-xx (e.g., P3-21 'Signal 2 actual value').

2. 2

   2. Measure the signal voltage or current at the drive's specific analog input terminal (e.g., X1:AI2) and compare it to the sensor's direct output.

3. 3

   3. Adjust the supervision thresholds (e.g., P3-22 'AI2 supervision low limit', P3-23 'AI2 supervision high limit') to a suitable operating range.

4. 4

   4. Confirm that the communication wire pair for the monitored signal is properly shielded and that the shield is terminated correctly.

5. 5

   5. Temporarily disable the signal supervision function (e.g., set P3-20 to 'No supervision') to isolate the issue to the signal path or the function itself.