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PLC Programming Fundamentals - Coggle Diagram
PLC Programming Fundamentals
PLC Overview
Definition
Digital industrial controller
Executes programmed logic
Controls machines and processes
Basic Components
CPU (Controller) - Executes logic
Input Modules -Read signals
Output Modules - Control devices
Applications
Industrial automation
Manufacturing systems
Process control
Development Environment Setup
Arduino Platform
Arduino UNO / Genuino UNO
ATmega328P microcontroller
USB programming interface
Power & Connectivity
7–12V DC input
USB cable for programming
Stable power required
Clones & Variants
Arduino clones
Derived boards
Compatible hardware options
Network Communication
Ethernet Shield
Wired internet connection
Uses RJ-45 interface
Supports cloud PLC
WiFi Shield
Wireless communication
Eliminates wired setup
Used for IoT-based PLC
Features
Data communication
Cloud integration
Remote monitoring
Grove Syste
Grove Base Shield
Plug-and-play interface
No soldering required
Supports multiple modules
Input Devices
Button - Manual input
IR Sensor -Object detection
Temperature Sensor -Analog input
Output Devices
LED - Visual indication
Relay - High-power control
Speaker - Audio output
Relay & Industrial Control
Relay Function
Controls high voltage
Acts as a switch
Provides isolation
Relay Shields
Multi-relay modules
Supports multiple outputs
Industrial load handling
Applications
Motor control
Lighting systems
Industrial machines
Industrial machines
Purpose
Protects PLC hardware
Enables structured wiring
Industrial mounting
DIN Rail System
Standard mounting method
Easy installation
Used in control panels
Components
Enclosure box
Terminal blocks
Connectors & PCB
Modbus & Industrial Communication
Modbus Protocol
Industrial communication standard
Uses RS232/RS485
Enables device networking
Modules
RS485 module
Multiprotocol shield
Sensor interfaces
Applications
Sensor data acquisition
Multi-device communication
Industrial monitoring
PLC System Operation
Input Processing
Reads sensor signals
Converts to digital values
Updates input table
Logic Execution
Processes ladder logic
Uses memory bits
Makes decisions
Output Processing
Sends signals to devices
Controls actuators
Executes final action