Industrial Automation and Control | course | just engineering

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Industrial Automation and Control
PLC (Programmable Logic Controller)
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PLC (Programmable Logic Controller))

• PLC stands of (Programmable Logic Controller)
• PLC is digital Programs use to be industrial
  computer that
• monitor Input, makes decisions and output to
  controls
• automate process Machine.
• These loaded programs are stored in non
  volatile
• memory of the PLC. During the transition of
  relay control
• panels to PLC, the hard wired relay logic was
  exchanged for
• the program fed by the user.
• the term logic is used because programming is
  primarily
• con corned with implementing
• 1) logic and
• 2) switching operations

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PLC Hardware

• Processer Unit or Central Processing Unit
• Power Supply Unit
• Programming Device
• Memory Unit
• Input Output Sections
• Communication Interface

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PLC Systems
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Advantages

•  
• PLCs can be programmed easily which can be
• understood clearly well.
• Very fast
• Easy maintenance due to modular assembly
• The controller has the input and output for
• interfacing.
• Easy to change logic
• They are user friendly and easy to operate
• Counter, timer and comparator can be
• programmed
• PLCs are easily programmed and have an easily
• understood programming language.
•  
• .

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