PLC training and PLC29 Jan 2010 06:24 pm
Understanding Human Machine Interface (HMI) for PLC control system
• The main purpose of an HMI is a simple graphical interface with a process possible.
· These devices are known by several names,
- Touch Screens
- Shows
- Man Machine Interface (MMI)
- Human Machine Interface (HMI)

This · allow an operator to use simple displays to determine machine condition and easy settings.
· The most common uses are
- Display machine faults
- Display machine status
- Allows the operator to start and stop cycles
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