How To Adjust Display Contrast; How To Use Push-Buttons - ABB REJ 527 Operator's Manual

REJ 527
3.1.2.4.
3.1.3.
10
Directional or Non-Directional Earth-Fault Relay
Operator's Manual

How to adjust display contrast

Contrast of the display is automatically adjusted depending on the ambient temper-
ature. To obtain optimum readability, the contrast can be adjusted manually. To
change the contrast, the LCD display must be in idle mode.
• To increase contrast, hold the [E] button pressed and use simultaneously the [
button for adjusting.
• To decrease contrast, hold the [E] button pressed and use simultaneously the [
button for adjusting.
increase
Push
E and
decrease
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The selected contrast tuning value is not stored. After power-off cycling of the relay
the contrast setting automatically returns to the factory preset value.

How to use push-buttons

The MMI includes push-buttons for manoeuvring the protection relay.
Navigation push-buttons
up
left right
down
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• A touch on the arrow button up [
or downward in a menu or as the minimum step up or down in the setting mode of
parameters.
• If the display shows the first item of a menu, pressing the [
affect the display at all; use the [
shows the last item of a menu, push the [
• The right arrow button [
menu level and the left arrow button [
from a subordinate menu.
• In addition, the MMI includes buttons [C] (cancel, clear) and [E] (enter). A more
detailed description of the push-buttons and their functions is found in the
following table.
Clear and Enter buttons
C
Clear/Cancel
E
Enter/Exit
↑ ↓
] or down [
↓
] button instead. Correspondingly, if the display
↑
] button to move in the menu again.
→
] is used for entering a subordinate menu from a higher
←
] for returning to a higher menu level
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] is interpreted as one step upward
↑
] button does not
↑
]
↓
]