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Chapter 1 - Introduction to Programmable Logic Controllers - Coggle Diagram
Chapter 1 - Introduction to Programmable Logic Controllers
PLC Overview
Definition of a PLC
Programmable controller for automation
Replaces conventional relay-based systems
Basic components and structure
CPU
I/O modules
PLC Tasks
Relay switching operations
On/off control of devices
Switching of electrical circuits
Process control tasks
Monitoring and regulating variables
Feedback control
Advantages of PLCs
Flexibility and scalability
Easily reprogrammed for different tasks
Can handle large-scale systems with numerous I/Os
Reliability and reduced maintenance
Fewer mechanical parts (no physical relays)
Easy diagnostics and troubleshooting
PLC Architecture
Open vs proprietary PLC architecture
Open: compatible with various brands and software
Proprietary: specific to one manufacturer
Modular and integrated systems
Modular: expandable with additional modules
Integrated: compact, with all components in one unit
I/O Systems
Types of I/O
Digital: binary on/off signals
Analog: continuous signals, such as temperature or pressure
Connection to the processor
Direct connection for small systems
Remote connection for larger, distributed systems