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A Human-Machine Interface (HMI) is used for:1. controlling the PLC program and interfacing the SCADA both2. allowing a user to interact with a device3. controlling the PLC program4. interfacing the SCADA

Answer» Correct Answer - Option 2 : allowing a user to interact with a device

Human-Machine Interface (HMI):

  • A Human-Machine Interface (HMI) is a user interface that connects a person to a machine, system, or device.
  • It also can refer to any screen that allows a user to interact with a device.
  • It is most commonly used in the industrial process.
  • It is sometimes referred to as Man-Machine Interface (MMI), Operator Interface Terminal (OIT), Local Operator Interface (LOI), or Operator Terminal (OT).
  • In industrial settings, HMIs can be used to Visually display data, Track production time, trends, and tags, Oversee KPIs, Monitor machine inputs and outputs, etc


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