Push-Button Functions - ABB REX 521 Operator's Manual

1MRS 751107-MUM
3.1.1.
Protection Relay
Operator's Manual

Push-button functions

The HMI includes push-buttons for operating the protection relay.
A quick touch on the arrow button up [
upwards or downwards in a menu or as the minimum step up or down in setting
mode of a parameter.
• The cursor stops at the first and last rows in a menu; pressing the [
↓
first row or [ ] button in the last row is ignored.
↑ ↓
• If the [ ] or [ ] button is kept pressed, the menus are automatically scrolled faster
than with single button pressings.
Navigation push buttons
up
left right
down
Fig. 3.1.1.-1 Push-buttons
The table below gives a short explanation of the push-buttons and their functions.
Table 3.1.1-1 Push-button functions
Up/Down
Left /Right
Clear/Cancel
Enter
↑
] or down [
Clear and Enter buttons
C
clear/cancel
E
enter
These buttons are used for:
• moving up and down in menus
• scrolling active digits of a parameter when entering
a new setting value
These buttons are used for:
• moving left and right in menus
• changing the active digit of a parameter when
entering a new setting value
This button is used for:
C
• leaving the setting mode without saving the values
• returning to the main view from submenus
• clearing indication messages
• clearing events when the event view is selected
(press 2 s)
• clearing alarm LEDs when the main view is
selected (press 2 s)
• resetting latched output relays (press 5 s)
This button is used:
E
• for entering the setting mode of a parameter
• for confirming a new value of a setting parameter
• in combination with the
adjusting the display contrast
REX 521
↓
] is interpreted as one step
↑
] button at the
↑ ↓
[ ] [ ]
or button for
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