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Programmable Logic Controllers (PLCs) - Coggle Diagram
Programmable Logic
Controllers (PLCs)
what a programmable logic controller (PLC) i
What is a PLC?
Industrial computer for controlling processes.
Replaces hardwired relays with programmable logic.
Key Features
Robust design for industrial environments.
Real-time control.
Flexible programming.
Non-volatile memory.
Benefits
Reduced wiring.
Increased reliability.
Improved flexibility.
Cost savings.
Applications
Beyond relay logic: timing, counting, calculations, etc.
Used across various industries.
main parts of a PLC
Components
CPU,
I/O,
Architecture Types
Fixed: Integrated, limited I/O, lower cost.
Modular: Flexible, expandable, uses modules.
Open: Compatible with third-party devices.
Closed: Proprietary, limited compatibility.
sequence of operation for a PLC
PLC vs. Relays
Replaces relay logic with programmable control.
Key Steps
Inputs (sensors, buttons) connected to input modules.
Output (motor) connected to output modules.
Ladder logic program created and stored in PLC memory.
classifications of PLCs
PLC vs. PC: Industrial-grade computers for control. Robust, specialized, single-program focus.
Types: Nano (small), Micro, Medium, Large (based on I/O count).
Applications: Single-ended, Multitask, Control Management.
Architecture: CPU, I/O, memory.
Software: Programming software, HMI software.
PACs: Combine PLC ruggedness with PC capabilities.