
Review of Short Phrases and Links 
This Review contains major "Ladder Logic" related terms, short phrases and links grouped together in the form of Encyclopedia article.
Definitions
 Ladder logic is a method of drawing electrical logic schematics.
 Ladder logic is the language used to communicate between humans and the PLC. It is called ladder logic because the form resembles that of a step ladder.
 Ladder Logic is a standardized set of relay ladder programming symbols and terminology.
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 Ladder logic is a sequential programming language that students use in designing their control programs.
 Ladder logic is the primary way industrial programmable controllers were programming originally.
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 Ladder logic can be thought of as a rulebased language, rather than a procedural language.
 A program in ladder logic, also called a ladder diagram, is similar to a schematic for a set of relay circuits.
 Ladder logic programming is a graphical representation of the program designed to look like relay logic.
 For example, Java, as a programming language, is far more powerful and flexible than Ladder Logic and is generally considered a "highlevel" language.
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 Ladder logic programming looks, well, like a ladder.
 This PLC and most others use a language called relay ladder logic programming.
 These instructions can be derived directly from the ladder logic diagrams and entered into the PLC through a simple programming terminal.
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 In an effort to make PLCs easy to program, their programming language was designed to resemble ladder logic diagrams.
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Ladder Logic
 Relay logic was historically important in industrial automation (see ladder logic and programmable logic controller).
 These PLCs were programmed in " ladder logic ", which strongly resembles a schematic diagram of relay logic.
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Categories
 Plcs
 Industrial Automation
 Ladder
 Procedural Language
 Schematic Diagram

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