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Introduction to PLC and SCADA
Presented By
Pawan Kumar Meena
21EELEE003
Department of Electrical Engineering
Government Engineering College Bharatpur
Introduction
•What is Automation?
Automation refers to the use of technology to perform tasks
without human intervention, increasing efficiency and reducing
the risk of errors.
PLCs and SCADA are key technologies that drive industrial
automation.
• Importance of PLC and SCADA:
PLCs are used to control machines and processes automatically,
while SCADA systems monitor and control large-scale industrial
processes remotely.
What is a PLC?
• • Definition:
• - A programmable logic controller (PLC) is an industrial
computer used to control machinery and processes.
• • Purpose:
• - Used to automate specific processes, like machinery on
factory assembly lines.
• • Key Features:
• - Reliability, rugged design, real-time operation.
Components of PLC
• Processor (CPU): Handles the control logic.
• Power Supply: Provides power to the PLC system.
• Input/Output Modules: Connects sensors and actuators to the
PLC.
• Communication Modules: For data exchange between PLCs
and other systems.
• Programming Device: Used to create and upload control logic.
Working of PLC
Cycle of Operations:
• - Describes the cycle of scanning inputs, executing control
programs, and updating outputs.
• • Programming Languages:
• - Ladder Logic, Functional Block Diagram (FBD),
Sequential Function Chart (SFC), Structured Text (ST),
Instruction List (IL).
Applications of PLC
• • Examples:
• - Manufacturing, conveyor systems, robotics, water
treatment, power distribution.
• • Industries Using PLCs:
• - Automotive, chemical, food and beverage, pharmaceuticals,
oil and gas.
What is SCADA?
• Definition: SCADA is a system for remote monitoring and
control of industrial processes.
• Purpose: Allows operators to control and monitor large
systems from a centralized location.
Components of SCADA
• • Human-Machine Interface (HMI): For operators to interact
with the system.
• • SCADA Server: Collects data from PLCs and RTUs.
• • RTUs and PLCs: Collects data from field devices.
• • Communication Network: Transmits data between field
devices and SCADA servers.
• • Historian Database: Stores data for analysis and reporting.
Data processing
• • Data Collection: From field devices through sensors.
• • Data Processing and Analysis: By the SCADA server.
• • Visualization: Real-time data on HMI screens for
monitoring.
• • Control Actions: Ability to send control commands back to
field devices.
Applications of SCADA
• • Examples:
• - Power grids, water distribution, oil and gas pipelines,
manufacturing, transportation.
• • Industries Using SCADA:
• - Utilities, telecommunications, energy, transportation,
environmental services.
Comparison of PLC and SCADA
• | Feature | PLC | SCADA |
• |-----------------|------------------------------|--------------------------
-----|
• | Primary Role | Control machinery/processes | Monitor and
control processes |
• | Data Processing | Real-time, deterministic | Real-time data
acquisition |
• | Control Level | Lower-level machine control | Higher-level
supervisory control|
• | Interaction | Limited interface | Extensive interface
(HMI) |
Integration of PLC and SCADA
• • How They Work Together:
• - PLCs control local machinery, while SCADA oversees
multiple PLCs.
• • Data Flow:
• - SCADA sends setpoints to PLCs; PLCs report process data
back.
• • Importance of Integration:
• - Enables efficient, safe, and accurate control of complex
systems.
Benefits of Using PLC and
SCADA
• • Efficiency: Automation reduces human intervention.
• • Reliability: Ensures consistent process quality and response.
• • Data Collection and Analysis: Enables predictive
maintenance.
• • Safety: Monitors and controls processes to prevent accidents.
Challenges and Considerations
• • Cybersecurity: SCADA systems are vulnerable to cyber-
attacks.
• • Complexity and Cost: Initial setup and maintenance require
expertise.
• • Scalability: Ensuring the system can grow with increased
demand.
• • System Integration: Compatibility of PLC and SCADA
systems with other components.
Conclusion
• • Summary: Importance of PLC and SCADA in industrial
automation.
• • Future Trends: Role of IoT, AI, and machine learning in
evolution.
• • Final Thoughts: Emphasis on efficiency and safety in modern
industry.
Q&A
• Invite questions and engage with the audience to clarify any
concepts.

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PLC AND SCADA (ENGINEERING WIDE AREA NETWORK TOPIC)

  • 1. Introduction to PLC and SCADA Presented By Pawan Kumar Meena 21EELEE003 Department of Electrical Engineering Government Engineering College Bharatpur
  • 2. Introduction •What is Automation? Automation refers to the use of technology to perform tasks without human intervention, increasing efficiency and reducing the risk of errors. PLCs and SCADA are key technologies that drive industrial automation. • Importance of PLC and SCADA: PLCs are used to control machines and processes automatically, while SCADA systems monitor and control large-scale industrial processes remotely.
  • 3. What is a PLC? • • Definition: • - A programmable logic controller (PLC) is an industrial computer used to control machinery and processes. • • Purpose: • - Used to automate specific processes, like machinery on factory assembly lines. • • Key Features: • - Reliability, rugged design, real-time operation.
  • 4. Components of PLC • Processor (CPU): Handles the control logic. • Power Supply: Provides power to the PLC system. • Input/Output Modules: Connects sensors and actuators to the PLC. • Communication Modules: For data exchange between PLCs and other systems. • Programming Device: Used to create and upload control logic.
  • 5. Working of PLC Cycle of Operations: • - Describes the cycle of scanning inputs, executing control programs, and updating outputs. • • Programming Languages: • - Ladder Logic, Functional Block Diagram (FBD), Sequential Function Chart (SFC), Structured Text (ST), Instruction List (IL).
  • 6. Applications of PLC • • Examples: • - Manufacturing, conveyor systems, robotics, water treatment, power distribution. • • Industries Using PLCs: • - Automotive, chemical, food and beverage, pharmaceuticals, oil and gas.
  • 7. What is SCADA? • Definition: SCADA is a system for remote monitoring and control of industrial processes. • Purpose: Allows operators to control and monitor large systems from a centralized location.
  • 8. Components of SCADA • • Human-Machine Interface (HMI): For operators to interact with the system. • • SCADA Server: Collects data from PLCs and RTUs. • • RTUs and PLCs: Collects data from field devices. • • Communication Network: Transmits data between field devices and SCADA servers. • • Historian Database: Stores data for analysis and reporting.
  • 9. Data processing • • Data Collection: From field devices through sensors. • • Data Processing and Analysis: By the SCADA server. • • Visualization: Real-time data on HMI screens for monitoring. • • Control Actions: Ability to send control commands back to field devices.
  • 10. Applications of SCADA • • Examples: • - Power grids, water distribution, oil and gas pipelines, manufacturing, transportation. • • Industries Using SCADA: • - Utilities, telecommunications, energy, transportation, environmental services.
  • 11. Comparison of PLC and SCADA • | Feature | PLC | SCADA | • |-----------------|------------------------------|-------------------------- -----| • | Primary Role | Control machinery/processes | Monitor and control processes | • | Data Processing | Real-time, deterministic | Real-time data acquisition | • | Control Level | Lower-level machine control | Higher-level supervisory control| • | Interaction | Limited interface | Extensive interface (HMI) |
  • 12. Integration of PLC and SCADA • • How They Work Together: • - PLCs control local machinery, while SCADA oversees multiple PLCs. • • Data Flow: • - SCADA sends setpoints to PLCs; PLCs report process data back. • • Importance of Integration: • - Enables efficient, safe, and accurate control of complex systems.
  • 13. Benefits of Using PLC and SCADA • • Efficiency: Automation reduces human intervention. • • Reliability: Ensures consistent process quality and response. • • Data Collection and Analysis: Enables predictive maintenance. • • Safety: Monitors and controls processes to prevent accidents.
  • 14. Challenges and Considerations • • Cybersecurity: SCADA systems are vulnerable to cyber- attacks. • • Complexity and Cost: Initial setup and maintenance require expertise. • • Scalability: Ensuring the system can grow with increased demand. • • System Integration: Compatibility of PLC and SCADA systems with other components.
  • 15. Conclusion • • Summary: Importance of PLC and SCADA in industrial automation. • • Future Trends: Role of IoT, AI, and machine learning in evolution. • • Final Thoughts: Emphasis on efficiency and safety in modern industry.
  • 16. Q&A • Invite questions and engage with the audience to clarify any concepts.