[PDF] Chapter 2: Basic Ladder Logic Programming Computer Aided Manufacturing TECH 4/53350 3 Simple Ladder Logic Primary Programming Language for PLCs. Visual and Graphical language unlike textual high-level, such as C, C++, Java Derived from relay logic diagrams Primitive Logic Operations: OR AND NOT Ladder Logic:[PDF] actuated - UToledo Engineering Before discussing or understanding the Programmable Logic Controller, we must first understand the devices the PLC was invented to replace. That was the ladder diagram. The ladder diagram or electrical schematic or elementary diagram can be divided into two distinct portions. The first is the power portion and the second is the control.
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