FRONT PANEL INTERFACE
4.2.4 LED indicators
22.214.171.124 Enhanced front panel
The enhanced front panel display provides five columns of LED indicators. The first column contains 14 status and event-
cause LEDs. The next four columns contain the 48 user-programmable LEDs.
key is used to reset any latched LED indicator or target message, once the condition has been cleared (these
latched conditions can also be reset via the
keys are used by the breaker control feature.
The status indicators in the first column are as follows:
IN SERVICE — Indicates that control power is applied, all monitored inputs/outputs and internal systems are fine, and
the relay is in (online) Programmed mode (under Settings > Product Setup > Installation)
TROUBLE — Indicates that the relay has detected an internal problem. Check the self-test messages outlined at the
end of the Commands and Targets chapter, and view the event records under Actual Values > Records. For a beta /
pre-release, this LED is always on.
TEST MODE — Indicates that the relay is in test mode. For information, see the Test Mode section in the Settings
TRIP — Indicates that the FlexLogic operand serving as a trip switch has operated. This indicator always latches;
initiate the reset command to reset the latch.
ALARM — Indicates that the FlexLogic operand serving as an alarm switch has operated. This indicator never latches.
PICKUP — Indicates that an element is picked up. This indicator never latches.
The event-cause indicators in the first column are as follows.
Event-cause LEDs are below the status LEDs. They are turned on or off by protection elements that have their respective
target setting selected as either "Enabled" or "Latched." If a protection element target setting is "Enabled," then the
corresponding event-cause LEDs remain on as long as the operand associated with the element remains asserted. If a
User-programmable pushbutton — Eight physical pushbuttons are associated with the first eight user-
programmable pushbutton elements. Numbering is down, that is, 1 to 4 down the left column and 5 to 8 down the
These elements control a set of FlexLogic operands that can be used to initiate outputs or select modes. Each
physical pushbutton has an integrated LED indicator that can be user-configured to display the appropriate
These pushbuttons have clear covers behind which custom labels can be mounted. A utility is available to print
the labels, under File > Front Panel Report in the software.
SETTINGS INPUT/OUTPUTS RESETTING
Figure 4-47: Typical LED panel for enhanced front panel
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: INTERFACES