8.3
Date Code 20020903 SEL-587Z Instruction Manual
Front-Panel Interface
Front-Panel Operation
At power up and before illuminating the EN LED, the relay scrolls through the
metering displays while completing the initialization process. When the EN
LED indicates that the relay is enabled, the LCD scrolls the metering displays
and the active Display Points.
Menu choices on the LCD are listed horizontally on the second line. The first
character of the menu choice is underlined. The left and right arrow buttons
move the underline to the adjacent menu selection. Once the underline
indicates your selection, use the {SELECT} pushbutton to proceed.
Target LEDs
The target LEDs are an indication of what the relay has detected on the power
system and how the relay has reacted during a trip event. The front-panel
legend gives a brief description of each target; also see Appendix C: Relay
Word Bits.
The only times the target LEDs do not illuminate according to the labels is
when the TAR command is issued through one of the serial ports. The TAR
command remaps the LEDs to follow a particular row in the Relay Word bits,
such that a Relay Word bit that is asserted will light the corresponding LED
position (see TAR (Target) on page 7.19 in Section 7: ASCII Command
Reference).
The states of the LEDs are stored in nonvolatile memory. If power to the relay
is lost, the LEDs will return to their last state when power is restored. EN
responds only to internal self-test routines.
Password Access
Commands that are at Access Level 2 (2AC) are password protected from the
front panel. Access Level 1 commands are not password protected when
operating the front panel (Access Level 1 commands are password protected
on the communications ports). The front panel is normally active at Access
Level 1. If you issue a command from the front panel that requires a Level 2
password, the relay prompts you for a password. After you enter the password
for the higher access level, you remain at that access level only until the front
panel times out from inactivity or you EXIT from the specific command.
When you EXIT the command, the front panel returns to Access Level 1.
If the password jumper, JMP22, is installed, there is no password protection,
and you will not be prompted for a password.
When prompted for a password, enter the 2AC password. All commands are
available using the 2AC password. The front-panel request for password
shows a display of six characters, shown initially as ABCDEF, with the A
underscored. Use the up/down arrow keys to scroll and set the first character
of the password. Passwords are case sensitive; be sure you use upper- or
lowercase letters as needed. Use the right arrow key to move to the second
character, and adjust it using the up/down arrows as before. Continue this
process until all six characters are filled. If the password has less than six
characters, fill the remaining slots with a “blank,” found between the
numeral 9 and the lowercase “a” in the character scroll. When the password is
complete, push {SELECT} to enter it. If the password is correct, the relay will
change to the higher level and permit you to perform that level’s commands. If
it is incorrect, the relay will declare an “Invalid Password,” and allow another
attempt. After three incorrect attempts, the relay will pulse the ALARM
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