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Human Machine Interface (HMI) Basics
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What is a Human Machine Interface (HMI)?
Human Machine Interface (HMI)
Purpose of an HMI
Core Visualization Functions
Manual and Automatic Operation
Reducing Operator Errors
HMI – PLC Interaction
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HMI Interaction with PLC Systems
SCADA overview
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PC-Based SCADA Systems
HMI vs SCADA
Benefits of HMI / SCADA Systems
HMI features
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HMI Screen Objects
Advanced HMI Display Objects
Visualization components
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Graphics and Visualization
Tagging and programming
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Tag Concept in HMI
Tag Examples
Programming Concept for an HMI
Communication methods
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Networking in HMI Systems
PLC–HMI–SCADA architecture diagrams
OPC communication
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Open Communication Architecture
OPC Communication
Trend Displays
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Trend Displays
Alarm Management
Alarm and event logs
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Alarm Management
Alarm Priority Colors
Remote Alerts and Notifications
System diagnostics
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System Diagnostics
Display hierarchy
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Four Levels of HMI Displays
High Performance HMI Displays
HMI System Design
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HMI Design Checklist
Color Scheme Guidelines
Final Design Principle
Real industrial HMI screen examples
Good vs Bad HMI design
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Display Design Best Practices
Learn HMI Design

Purpose of an HMI

  • Provide real‑time visualization of machine status
  • Allow operators to start, stop, or adjust processes
  • Display alarms and system warnings
  • Improve operational awareness and productivity
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