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Firstly to trigger the threshold crossing module, it is necessary to configure include the predefinedActivity "threshold event crossing" in a workflow. When the threshold crossing module runs it will look at the configured timeseriesset in the ThresholdValueSets file and check if any data was written to these timeseries. Timeseries are only checked for threshold crossings if the data values have changed. For external timeseries it is possible to skip the check for changes and always check for threshold crossings. This can be configured with option 'onlyCheckThresholdsOfChangedSeries' in the workflow descriptor file.
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