A888

Edge counter 1

ABB · ACS880

What does A888 mean?

Warning generated by edge counter 1, indicating that a specific number of events (edges) has been detected or a threshold has been crossed. This is typically used for monitoring operations, component life, or sequence integrity. Ignoring this could lead to unexpected behavior or component failure if a limit is exceeded.

Common Causes

  • Edge counter 1 (Parameter P4-05) has registered a number of events equal to or greater than its programmed threshold (P4-05.01 Edge Count 1 Limit).
  • The physical sensor or input generating the 'edges' is functioning correctly, and the count signifies a legitimate operational milestone (e.g., production cycles).
  • The threshold value for Edge Counter 1 (P4-05.01) was set too low for the intended monitoring period or component lifespan.
  • The counter was not reset after reaching a previous limit, causing the warning to re-appear without new events.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Determine the specific event or process being monitored by Edge Counter 1 (e.g., motor starts, product counts) by checking related documentation.

  2. 2

    Record the current event count from parameter P4-05.00 (Current Edge Count 1) for operational tracking or maintenance logs.

  3. 3

    Perform any scheduled maintenance, inspection, or data logging associated with the accumulated event count.

  4. 4

    Reset Edge Counter 1 to zero by setting parameter P4-05.02 (Reset Counter 1) to '1' (Execute) after completing the necessary actions.

  5. 5

    Adjust the threshold in parameter P4-05.01 (Edge Count 1 Limit) if the monitoring interval for the event needs modification.

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Verified technical data. Last updated: March 2026

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