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.