InTouch SCADA Scripting - Setting the Start Time of a Historical Trend

The ChartStart dot field can be used with the Historical Trend tag to read or write the value of the start time (left-hand side of the trend).



Reads / writes positive integer values

HistoricalTrendTag.ChartStart = integer value;


The integer value is a representation of the number of minutes passed 1st January 1970.



HistoricalTrendTag.ChartStart = HistoricalTrendTag.ChartStart – 60;

The above example will subtract 60 minutes from the current trend start time.


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