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Table of Contents

Starters  
  What is a PLC?
  PLC History
Theory of Operation  
  The Internals
  How it Works
  Response Time
  Effects of Response Time
Creating Programs  
  Relays
  Replacing Relays
  Basic Instructions
  Basic Program Example
  PLC Registers
  A Level Application
ANIMATED
How a Ladder is Scanned
Main Instruction Set  
ANIMATED
Latching Instructions
ANIMATED
Counters
ANIMATED
Timers
  Timer Accuracy
ANIMATED
One-Shots
ANIMATED
Master Controls
ANIMATED
Shift Registers
ANIMATED
Moving Data
Numbers  
  Math
  Number Systems
  Boolean Math
Wiring  
  DC Inputs
  AC Inputs
  Relay Outputs
  Transistor Outputs
Communications  
  Communications History
  RS-232 Comm (hardware)
  RS-232 Comm (software)
  Using RS-232 (Ladder Diagram)
Manufacturers Links  
  Links

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