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Questions and Answers
What is the function of the HMI in relation to the PLC?
What is the function of the HMI in relation to the PLC?
- The HMI serves as a backup for the PLC programming.
- The HMI displays information received from the PLC. (correct)
- The HMI directly controls the field devices.
- The HMI generates control signals for the PLC.
What is a key purpose of the data historian mentioned in the content?
What is a key purpose of the data historian mentioned in the content?
- To serve as a repository for historical data. (correct)
- To provide real-time control of the process.
- To visualize data trends in real time.
- To replace the PLC as the main control system.
Which concept is NOT mentioned in relation to the HMI?
Which concept is NOT mentioned in relation to the HMI?
- Executing complex algorithms for data processing. (correct)
- Connecting with a trunk for outputs.
- Interacting with human operators in real time.
- Transmitting data via specific protocols.
In what way can the HMI provide valuable information over time?
In what way can the HMI provide valuable information over time?
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Study Notes
Analog Outputs
- Analog outputs can be connected via a trunk system.
- Complement digital outputs, enabling a comprehensive control system.
Human Machine Interface (HMI)
- Operators interact with an HMI, viewing data on a screen.
- Data displayed on the HMI originates from a Programmable Logic Controller (PLC).
- Communication between PLC and HMI occurs through specified protocols discussed in other modules.
Data Historian
- HMI can send data to a data historian.
- Functions as a repository for data, allowing for long-term storage and analysis.
- Enables trending analysis to monitor and review historical process data.
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