CyberCertPrepOT Security FundamentalsOT Fundamentals: ICS/SCADA BasicsEASYFree question
Operators watch a graphic screen of a boiler and click to change setpoints. What kind of system provides that screen?
- A.A programmable logic controller module
- B.A data historian archive
- C.A human machine interface display
- D.A distributed control system rack
Why C is correct
The HMI is the operator window into the process, showing live values and accepting commands that are sent to controllers. Controllers execute logic and a historian stores records without being the operator display.
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