The graphical programming realm Explaining the principal differences among the graphical PLC programming languages, Yerger started with Ladder Diagram, noting its development from relay logic. “It ...

The IEC 61131 standard defines five hardware-independent programming languages for PLCs and PACs. Those languages, Ladder Diagram (LD), Sequential Function Charts (SFC), Function Block Diagram (FBD), ...

The differences among and preferences for Instruction List, Structured Text, Ladder Diagram, Function Block Diagram, and Sequential Function Chart PLC programming languages, as ...