Alert Thresholds - Adding Time Delay or Comparison Conditions

Alert Thresholds - Adding Time Delay or Comparison Conditions



SimpliScada introduces Conditional Thresholds, enabling more intelligent and flexible alerting. With this feature, threshold conditions can be modified using either a time delay or a comparison to another tag value.

Time Delay


The Time Delay condition allows a configurable wait time before an alert is triggered.

When a tag value crosses a defined threshold, the system will:

  1. Wait for the specified delay period
  2. Re-evaluate the tag value after the delay
  3. Generate an alert only if the threshold is still exceeded

Example:
During normal startup, system pressure may temporarily exceed a threshold. By applying a time delay, these short-lived spikes will not trigger alerts, while sustained high-pressure conditions will still generate a notification.

Compare to Another Tag


The Compare to Another Tag condition allows alerts to be triggered based on the state of a secondary tag.

When a tag exceeds its threshold, the system will:

  1. Check the value of a specified comparison tag
  2. Evaluate it against defined criteria
  3. Generate an alert only if both conditions are met

Example:
For leak detection, an alert can be generated if a flow sensor exceeds its threshold only when the associated pump is not running.

Summary

Conditional Thresholds provide a powerful way to create more context-aware alerts, helping reduce false alarms while ensuring critical events are not missed.

For a more detailed walk-through on setting up Alert Thresholds see our knowledge base article: Setting High (HH H) or Low (LL L) Alert Thresholds for a Tag or Address

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