openTrendCurves()

Example

The trend group "MIN-MAX" opens, for example, a trend display with a black curve of a measured value, a red curve for a maximum value and a green curve for a minimum value. In this case, the function for a compressed data point would be:

main()
{
  openTrendCurves("MIN-MAX", -1, makeDynString("$CURVE1:TEST.C1.AVG", "$CURVE2:TEST.C2.MIN",
                  "$CURVE3:TEST.C2.MAX"));
}

Automatically, the Variable Trend displays in a new module.

Example

In this example, the trend "ExampleTrend2" opens in the type "last view" and the values of the DP "ExampleDP_Result" will be shown.

main()
{
  openTrendCurves("ExampleTrend2", -1,
                   makeDynString("$CURVE1:ExampleDP_Result."));
}       

Example

CNS names can be used for a trend curve:

main(mapping event)
{
  openTrendCurves("VarTrend_0002",1,makeDynString("$CURVE1:System1.Windpark:WindWane.WindDirection.Easterly", "$CURVE2:System1.Windpark:WindWane.WindDirection.TrueNorth"));
}            

Example

When adding trend curves with the function openTrendCurves(), you do not need to specify the number of a curve and the sequence in which the curves were created in the variable trend panel is used automatically. Therefore, you can add curves as follows:

Using the curve number:

main()
{
 openTrendCurves("MIN-MAX", 1, makeDynString("$CURVE1:Analog_DP.C1.AVG_WT0", "$CURVE2:Analog_DP.C2.MIN",
 "$CURVE3:Analog_DP.C2.MAX"));
}

main()
{
 openTrendCurves("MIN-MAX", 1, makeDynString("$CURVEAnalog_DP.C1.AVG_WT0", "$CURVEAnalog_DP.C2.MIN",
 "$CURVEAnalog_DP.C2.MAX"));
}

Example

You can also use the function openTrendCurves() without specifying the number of a curve followed by a colon and the DP name.

main()
{
    openTrendCurves("VarTrend_0003", 7, makeDynString("$CURVE:dp1.response.actvalue.value",
                   "$CURVE:dp1.command.setpoint",
                   "$CURVE:dp1.command.setpoint")
                    );                
}