/// <summary>
/// SubMaxMin delegate. Subtracts min from max value in a timespan.
/// </summary>
/// <param name="rdxQuery"></param>
/// <param name="opcUaNode"></param>
public static async Task SubMaxMin(RDXOeeKpiQuery rdxQuery, ContosoOpcUaNode opcUaNode)
{
double max = await rdxQuery.OpcUaQueries.GetAggregatedNode(rdxQuery.SearchSpan, rdxQuery.AppUri, opcUaNode.NodeId, RDXOpcUaQueries.MaxValues());
double min = await rdxQuery.OpcUaQueries.GetAggregatedNode(rdxQuery.SearchSpan, rdxQuery.AppUri, opcUaNode.NodeId, RDXOpcUaQueries.MinValues());
opcUaNode.Last.Value = max - min;
opcUaNode.Last.Time = rdxQuery.SearchSpan.To;
opcUaNode.UpdateRelevance(rdxQuery.TopologyNode);
}
/// <summary>
/// Min delegate. Returns smallest value in a timespan.
/// </summary>
public static Task Min(RDXOeeKpiQuery rdxQuery, ContosoOpcUaNode opcUaNode)
{
return(Aggregate(rdxQuery, opcUaNode, RDXOpcUaQueries.MinValues()));
}