Fronius MagicWave 190 Operating Instructions Manual page 84

Setting parameters
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Press the adjusting dial in the selected menu
The first parameter in the menu is selected.
Turn the adjusting dial and select the desired parameter
Press the adjusting dial to change the parameter
The background of the parameter value becomes blue.
Turn the adjusting dial and set the value of the parameter
The change in the parameter value takes effect immediately
Press the adjusting dial to select other parameters