FBD OR Vertical Rail

The FBDClosed "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 rungs.

  • The OR rail can be inserted on a rung in order to connect parallel contacts together.
  • Select the Insert OR Rail button in the FBD toolbar to insert a new OR rail:

Insert 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.