Left Power Rails

Left Power Rails are graphic components of Functional Block Diagram (FBD) programs that represent the left boundary of a rung. Any horizontal link connected to a left power rail has the Boolean state TRUE.
You can link left power rails to right power rails and many FBD and Ladder Diagram (LD) elements, including variables, blocks, jumps, returns, vertical bars, coils, and contacts.
To insert a left power rail
  • From the
    Toolbox
    , drag the left power rail element into the language container.
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