13
Human Machine Interface &KDSWHU
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The number of buttons used on the HMI module is reduced to a minimum to allow a 
communication as simple as possible for the user. The buttons  normally have more than 
one function, depending on actual dialogue.
Pressing any button in idle mode will activate the HMI display.
The C button has three main functions:
• &DQFHO any operation in a dialogue window.
1. Status indication LEDs
2. LCD unit, example of main menu
3. &DQFHO and (QWHU buttons
4. Navigation buttons
5. Optical connector
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