FBD OR Vertical Rail

The FBD "Function Block Diagram" A function block diagram describes a function between input variables and output variables. A function is described as a set of elementary blocks Editor enables the drawing of FFLD "Free Form Ladder Diagram" rungs.

• The OR rail can be inserted on a rung in order to connect parallel contacts together.
• In the FBD toolbar , click the Insert OR Rail button () to insert a new OR rail.
  • In this mode, the mouse is used to insert a rail that collects several Boolean data flows for an OR operation to insert parallel contacts (e.g., Ladder Diagrams).
• The OR rail has exactly the same meaning as an OR block regarding the execution of the diagram.