Reinitialize a trend

[Hi-Volt]

Hi. I need to reinitialize a trend, deleting the old values of the curve when a user logs out. Is it possible? In which way?
Thank you!
Best regards

[mark.monroe]

Hi Hi-Volt,

There is no way to clear the trend lines on the screen. You can start and stop individual trend lines and you can hide or show the trend line control.

Code: Select all

    public partial class Screen1
    {
		static ICurve aCurve;

		
		void Button1_Click(System.Object sender, System.EventArgs e)
		{
			//Stop aCurve from being updated
			this.Trend1.Curves.Remove(aCurve);			
		}
		
		void Button2_Click(System.Object sender, System.EventArgs e)
		{
			//Start aCurve up again
			this.Trend1.Curves.Add(aCurve);
		}
		
		void Screen1_Opened(System.Object sender, System.EventArgs e)
		{
			//Which curve to start/stop
			aCurve = this.Trend1.Curves[0];
		}	
    }

[ladin79]

Hi,
how can I use the same function for a chart?

[mark.monroe]

The chart object is control by puting data into tag arrays. If you want the chart to display something different, then you need to change the data that is stored in the array that the chart is graphing.

So to zero out a chart, put zeros in the tag arrays that the chart is graphing.