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This configuration option consists of a relative view period that controls which threshold events are shown in the display by default. The relative period is converted to an absolute period based on the current system time. Only threshold events will be shown if their Event Time lies within the configured period. Changing the System Time is one way to change  the view period the events. The other way to change the view period is described in the section on filtering.

Each thresholdValueSet file can contain a single EventTimeViewPeriod element. When multiple thresholdValueSet files are configured and they each have their own relative period then the overal view period is an extension of all the individual view periods.

<?xml version="1.0" encoding="UTF-8"?>
<thresholdValueSets xmlns="http://www.wldelft.nl/fews" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.wldelft.nl/fews http://fews.wldelft.nl/schemas/version1.0/thresholdValueSets.xsd">
  <thresholdValueSet id="010H" name="H 010">
  ...
  </thresholdValueSet>
  <eventTimeViewPeriod start="0" end="7" unit="day"/>
</thresholdValueSets>

Visible

This configuration options allows you to control the visibility of threshold values. The 'visible' field can be set for each threshold value separately. By default all threshold values are visible. To hide none interesting threshold values from being shown in the display, they must have their visible value set to 'false'.

  <thresholdValueSet id="013H" name="H 013">
    <levelThresholdValue>
      <levelThresholdId>Alarm</levelThresholdId>
      <value>8.10</value>
      <visible>false</visible>
    </levelThresholdValue>
    ...