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PLC (Programmable logic controller) - Coggle Diagram
PLC (Programmable logic controller)
What is the PLC?
Specialized device for controlling machines and processes
Where are PLC used?
Used in various industries: factories, oil refineries, etc.
How the PLC is made?
Delicate electronic circuits
Need to be robust for tough industrial environments
Come in different shapes and sizes
The component of PLC
Power Supply
Provides electricity (AC or DC)
CPU (Central Processing Unit)
Microprocessor, memory chip, and integrated circuits
Control logic, monitoring, and communications
Operating modes: Programming mode and Run mode
Programming mode: Downloads program from external PC
Run mode: Executes the program and operates the process
Programming (Ladder Logic)
Most common form of programming for PLCs
Uses symbols to represent the electrical circuit
Looks like a ladder
Input/Output Section
Physical connection between external components and the PLC
Input devices
Digital: On/off signals (e.g., pushbuttons, switches)
Analog: Pressure transducers, flow meters, thermocouples
Output devices
Digital: On/off control (e.g., lights, LEDs, motors)
Analog: Flow controllers, pressure regulators, position controls