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Trigger Feeds window

The Trigger Feeds window is used to configure alarms that will trigger projection runs. These alarms can be used to alert the user about interesting occurrences in the data coming from external sources (e.g. SCADA). For example an alarm can be raised (alarm ON) whenever a certain value goes below or above a certain level, and projection runs automatically triggered at a frequency defined by the user.

Trigger Feeds page of the Baseline Object Window

Option

Description

Enable projection runs triggered by alarms

Tick this check box to enable triggering of projection runs.

This option is disabled by default.

Minimum triggered run repetition (min)

Indicates how often the triggered runs will be performed if the alarm condition stays true.

Note:

It is highly recommended to set this value to be less than the value entered for the Run every field of the Default Model page, which relates to scheduled runs.

Live Data Trigger Feeds

The Live Data Trigger Feeds parameters are used to configure alarms that will trigger projection runs.

Live Data Trigger Feed Parameter

Description

Alarm Name

Name of the alarm (should be unique).

Enable

Check this option to enable the alarm so its condition is evaluated.

It may be useful to disable alarms whenever incoming SCADA values are known to be incorrect or if they are missing.

Feed Name

Name of the feed.

This dropdown list contains all the available feeds, as specified in the Live Data object in InfoWorks WS Pro.

Tip:

If more than one live data configuration object is selected on the Live Data window, only feeds from the first Live Data Configuration will be available from the Feed Name dropdown list.

Select a feed.

Test Criterion

Available comparison operators:

  • <
  • <=
  • =
  • >=
  • >

Critical Value

Fixed value, which combined to the test criterion constitutes the condition of the alarm that will be evaluated.

Time Window

Time period during which the alarm condition is to be evaluated.

This is typically between now and the preceding N minutes.

Critical Percentage

Defines the minimum amount of time that the alarm must be ON within the time window for a projection run to be triggered. This value is expressed as a percentage of the time window total duration.

A critical percentage of 50% indicates that the alarm condition must be true during at least half the time of the time window for projection runs to be triggered.

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