Scada calls fail if float times are used due to using len(str(start)) to do log10(start)

[kdund]

The line here:

straxen/straxen/scada.py

Line 233 in 42d3f38

if len(str(start)) < 19 or len(str(end)) < 19:

uses the length of the string representation of the number to do log10
that works for ints, not for floats.
If only ints are to be used, I think a separate test should be done for this.

[JoranAngevaare]

Should be fixed in #560