Locator
Description
10-2
Human-Machine Interface
BE1-951
Figure 10-2. Menu Tree Branches
C
Relay Trouble Indicator - This red LED lights momentarily during start-up and
lights continuously when a relay failure is detected. Section 6, Reporting And
Alarm Functions provides a complete description of all relay failure alarm
diagnostics.
D, E
Minor Alarm, Major Alarm Indicators- These red LEDs light to indicate that a
programmable alarm has been set. Each indicator can be programmed to
annunciate one or more conditions. Section 6, Reporting And Alarm Functions
provides detailed information about programming alarms.
F
Trip Indicator - A flashing Trip LED indicates that a protective element is picked
up. A continuously lit LED indicates that a trip output is closed. This red LED
is sealed in if a protective trip has occurred and targets are displayed.
G
Communication Port 0 - This RS-232 serial port can be used to communicate
with the relay using simple ASCII command language. A computer terminal or
PC running terminal emulation software (such as Windows 95® HyperTerminal)
is required to send commands to the relay or receive information from the relay.
H
Reset Pushbutton - Pushing this switch will reset the Trip LED, sealed-in Trip
Targets, Peak Demand Currents, and Alarms.
I
Scrolling Pushbuttons - Use these four switches to navigate
(UP/DOWN/LEFT/RIGHT) through the LCD’s menu tree. When in Edit mode,
the LEFT and RIGHT scrolling pushbuttons select the variable to be changed.
The UP and DOWN scrolling pushbuttons change the variable.
J
Edit Pushbutton - Settings changes can be made at the front panel using this
switch. When pushed, this switch lights to indicate that Edit mode is active.
When you are finished making settings changes (using the Scrolling
Pushbuttons) and the Edit switch is pressed again, the switch light turns off to
indicate that your settings changes have been saved. If changes aren’t
completed and saved withing five minutes, the relay will automatically exit the
Edit mode without saving any changes.
K
Identification Label - This label lists the style number, serial number, sensing
input current and voltage range, and power supply input voltages.
Menu Tree
A menu tree with six branches can be accessed through the front panel controls and display. The left and
right scrolling pushbuttons are used to view each of the six branches. A greater level of detail in a menu
branch is accessed using the down scrolling pushbutton. Every display screen of the menu tree is
numbered in the upper left hand corner. This number eases navigation below the top level of the menu tree
by indicating the current branch and level in the menu tree structure. Each time a lower menu tree level is
reached, another number is added to the screen number separated by a period. The up scrolling pushbutton
is used to return to the top of the menu branch.
The six branches of the menu tree are illustrated in Figure 10- 2 and summarized in the following
paragraphs.
