Bar Graph fill functionality is quite useful when creating special effects within animated screens in InduSoft Web Studio SCADA/HMI software. This fill is different from using a resize animation since the animation actually fills an object of any shape, rather than changing the size or shape of an object. Where you can use the resize animation to grow a rectangle based on the value of a tag, the Bar Graph animation can fill the object, which looks nearly the same. But what if the object is not a rectangle? Whether a rectangle, ellipse, or a closed polygon, the Bar Graph Fill animation will fill the object with a specific color based on a tag or expression value from the left, right, top, bottom or center.
The simplest use of the fill animation is to create a rectangle, choose a foreground color and limits, then insert a tag or expression that is resolved between the limits, and finally a direction for the fill: up, down, left, right, or from center, depending on the orientation (Figure 1).
Figure 1: The configuration popup for Bar Graph Fill Animation.
The most common use of the Bar Graph Animation is to create a tank sightglass in order to view the level of a tank (See Figure 2.) Most of the tank symbols available in the System Symbols use a Bar Graph Fill Animation as a sightglass.
Figure 2: Tank Sightglass
The following animations (See Figure 3) show some of the ways that Bar Graph Fill Animations can be used in your own InduSoft SCADA project.
Figure 3: Various Bar Graph Fill Animations