KNOWLEDGE · AMADEUS LAB
HMI
An HMI is the screen or software interface through which an operator views machine status, acknowledges alarms and performs permitted actions.
SIMPLE EXPLANATION
Human-Machine Interface in context
The HMI reads selected values from a PLC or control system and presents them in an operator-focused format. Commands are written back only when the user has the required permission and the control logic allows it.
Example
A machine-mounted touch panel that shows temperature, speed, setpoints and fault messages is an HMI.
COMMON QUESTIONS
Frequently asked questions
What is HMI?
An HMI is the screen or software interface through which an operator views machine status, acknowledges alarms and performs permitted actions.
How does HMI work?
The HMI reads selected values from a PLC or control system and presents them in an operator-focused format. Commands are written back only when the user has the required permission and the control logic allows it.
When is HMI used?
A machine-mounted touch panel that shows temperature, speed, setpoints and fault messages is an HMI.
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