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User Guide
2.1
LCD display and keypad description
2.1.1
LCD display
In the front panel, a liquid crystal display (LCD) displays settings, measured values and alarms. Data is
accessed through a menu structure.
The LCD has two lines, with sixteen characters each. A back-light is activated when a key is pressed
and will remain lit for five minutes after the last key press. This allows the user to be able to read the
display in most lighting conditions.
2.1.2
Keypad
The keypad has seven keys divided into two groups:
•
Two keys located just under the screen (keys and ).
Keys and are used to read and acknowledge alarms. To display successive alarms, press key .
Alarms are displayed in reverse order of their detection (the most recent alarm first, the oldest alarm
last). To acknowledge the alarms, the user can either acknowledge each alarm using or go to the end of
the ALARM menu and acknowledge all the alarms at the same time.
•
Four main arrow keys located in the middle of the front panel.
They are used to navigate through the different menus and submenus and to do the setting of the
relay.
The enter key is used to validate a choice or a value (modification of settings).
2.2
LEDs
The top four LEDs indicate the status of the relay (Trip condition, alarm LED, equipment failure, Power).
The four lower LEDs are freely programmable by the user and can be assigned to display a threshold
crossing for example (available for all models) or to show the status of the logic inputs .The description
of each one of these eight LEDs located in the left side of the front view is given hereafter (numbered
from the top to bottom from 1 to 8)
LED 1
LED 1 indicates that the relay has issued a trip order to the cut-off element (circuit breaker, contactor).
This LED recopies the trip order issued to the Trip logic output. As soon as a triggering order is issued,
the LED lights up. It is cleared when the associated alarm is acknowledged either through the front
panel, or by a remote command, a digital input, or by a new fault (configuration/Alarms menu).
LED 2
LED 2 indicates that the relay has detected an alarm. This alarm can either be a
threshold crossing (instantaneous), or a trip order (time delayed). As soon as an alarm
is detected, the LED starts blinking. After all the alarms have been read, the LED lights
up continuously. After acknowledgement of all the alarms, the LED is extinguished.
The alarm LED can be reset by the front panel.
Color: RED
Color: YELLOW
Label: Trip
Label: ALARM
HF9024
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