In PowerApps, if you are trying to sum up values generated from a concatenation process, especially time differences in your case, you will need to adjust your approach slightly. Since Concatenate is used for string operations and won’t directly help in summing up numeric values, you will need to use a different function.
Sum(
Filter(
DataTable1,
Anlage.Value = DataTable1.Selected.Anlage.Value
),
DateDiff(
TimeValue(Hour(Störungseingang) & ":" & Minute(Störungseingang)),
TimeValue(Hour(Störungsausgang) & ":" & Minute(Störungsausgang)),
Minutes
)
)
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