DspMarkerNew

Creates a new trend marker. A trend marker is used to show cursor values or limits on a trend. You can use up to 10 markers on a single trend or chart.

If you add markers to a trend or chart that Plant SCADA is animating, you need to repaint them using the trend paint event (OnEvent(Window,22)). (Otherwise Plant SCADA will delete any markers displayed when the trend is updated.)

Syntax

DspMarkerNew(nAN, Mode, Color)

nAN:

The animation-point number.

Mode:

The mode of the marker:

0 - A vertical marker

1 - A horizontal marker

Color:

The color of the marker (flashing color not supported). Select a color from the list of Predefined Color Names and Codes or create an RGB color using the function MakeColour.

Return Value

The marker handle, or -1 if the function is unsuccessful. The marker handle identifies the table where data on the associated marker is stored.

Related Functions

DspMarkerMove, OnEvent

Example

INT offset; ! offset of marker
INT hMarker; ! marker handle
hMarker = DspMarkerNew(40, 0, WHITE);
! create a new marker, vertical WHITE
offset = 100;
DspMarkerMove(40, hMarker, offset);
! Moves marker to offset 100
OnEvent(22, MyTrendPaint);
! set trend paint event, needs to stop event when change pages
! this function is called when Plant SCADA updates the trend
INT

FUNCTION

MyTrendPaint()

DspMarkerMove(40, hMarker, offset);

RETURN 0;

END

See Also

Display Functions