Course Content

  • Hacks for Ladder Logic

Course Content


  • To use with the PLC Simulator, create a new project.
  • Layout of a PLC Simulator.
  • Creating a Ladder Diagram with the Ladder Diagram Editor
  • Connect the PLC Simulator to the computer.
  • The PLC Simulator can be downloaded and run.
  • The PLC Simulator is used.

Despite the availability of various different languages established in the IEC 61131-3 standard, ladder logic remains the most popular programming language for PLCs, accounting for more than 81 percent of the global market.

  • CLICK PLC Ladder Logic Instruction Set
  • Not Equal.
  • One Greater Than the other.
  • One Greater Than or Equal To the other.
  • One Less Than the other.
  • One Less Than or Equal To the other.

A ladder diagram is a graphical depiction of a circuit that is based on well-understood circuit design concepts. The ladder diagram has been particularly popular for applications that must be debugged or maintained by workers who do not have software expertise, such as some electricians or plant technicians.

The most common PLC programming methods used are:

  • Relay Ladder Logic (RLL)
  • Structured Text (ST)
  • Function Block Diagram (FBD)
  • Sequential Function Charts (SFC)
  • Instruction List (IL)

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