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Low level operator interface Highl level LLEI HLEI

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29. a.i. Various Displays Used in DCS and Their Specific Functions:

1. Operator Displays: Provide real-time data visualization, process control options, and system status updates. Common in centralized control rooms for ongoing monitoring and operation.
2. Engineering Displays: Allow access to system configuration settings, advanced diagnostics, and detailed process information for troubleshooting and system optimization.
3. Trend Displays: Show historical data trends that help in analyzing process performance over time and predicting future behavior.
4. Alarm Displays: Focus on alerting operators to system deviations or malfunctions. They highlight urgent issues that require immediate attention.
5. Safety System Displays: Dedicated to monitoring and controlling safety-related devices and systems, ensuring they are functioning properly to prevent accidents.

29. a.ii. Five Online Diagnostic Features in DCS:

1. Real-time Process Monitoring: Continuously checks the status of various process parameters and system performance.