Automation & Control
HMI
The screen or interface an operator uses to interact with a machine.
IN ONE SENTENCE
It shows values, alarms and controls and lets authorised users change settings.
In normal English
An HMI does not usually replace the PLC; it provides the human-facing layer for the control system.
Why would I use it?
Use it when operators need to see and control what the machine is doing.
THINK OF IT LIKE…
The machine's dashboard and control panel.
Related terms
PLC, SCADA, touchscreen
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