Rockwell-automation Logix5000 Controllers Ladder Diagram Programming M Manual de usuario Pagina 9

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Chapter 1
Program ladder diagram
Instruction
You organize ladder diagram as rungs on a ladder and put instructions on each
rung. There are two basic types of instructions:
Input instruction: An instruction that checks, compares, or examines
specific conditions in your machine or process.
Output instruction: An instruction that takes some action, such as turn on
a device, turn off a device, copy data, or calculate a value.
Branch
A branch is two or more instructions in parallel.
Introduction
Rock well Automation Publication 1756-PM008E-EN-P - October 2014 9
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