Ladder Logic Programming

This module provides an introduction to ladder logic programming techniques using laboratory simulation software. The lab component of the module provides the student with an opportunity to write ladder logic programs and test their operation through PLC simulation. Topics covered in the module include I/O instructions, safety circuitry, programming restrictions and I/O addressing.

Learning Outcomes:

• Define ladder logic.
• Convert relay logic schematics to ladder logic.
• Write a ladder logic program using PLCLogix.
• Define the terms examine on and examine off.
• Explain the purpose of a latching relay instruction.
• Differentiate between a branch and a nested branch.
• Describe the controller scan operation.
• Name two programming restrictions.
• Describe the use of Force instructions in PLC applications.
• Explain the purpose of bit status flags.