FBD Elements

When programming in Function Block Diagram (FBD), place elements in the workspace by dragging them from the Toolbox into the language container. For FBD program organization units (POUs), available elements are:

Blocks

Variables

Vertical Bars

Labels

Jumps

Returns

Rungs

Left Power Rails

Right Power Rails

Coils

Contacts

Regions

Comments

For links between FBD elements, set the property Is Negation
to TRUE to place a negation at the end of a link. Also, indicate whether to display an arrow at the end of a link by enabling the property Is Arrow
. The Line Style
property specifies the style of the link where the possible values are solid, dash, dot, dash-dot, and dash-dot-dot. The Line Type
property specifies the type of line used for links. The normal line type has squared corners and overlapping link intersections. The rounded line type has rounded corners and overlapping link intersections. The rounded with jump line type has rounded corners and link intersections are jumped over.

For variables connected to variable, coil, and contact elements, add these to existing variables groups from the language container by right-clicking the variable, pointing to Add to Variable Group
, then clicking the required group.

FBD Language