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4. User Interface
4.1 Outline of User Interface
The user can access the relay from the front panel.
Local communication with the relay is also possible using a personal computer (PC) via an
RS232C port. Furthermore, remote communication is also possible using RSM (Relay Setting and
Monitoring), IEC103 communication via an RS485, optical fibre or Ethernet LAN etc.
This section describes the front panel configuration and the basic configuration of the menu tree of
the local human machine communication ports and HMI (Human Machine Interface).
4.1.1 Front Panel
As shown in Figure 3.1.13, the front panel is provided with a liquid crystal display (LCD), light
emitting diodes (LED), operation keys,
VIEW
and
RESET
keys, monitoring jack and RS232C
connector.
LCD
The LCD screen, provided with a 4-line, 40-character back-light, displays detailed information of
the relay interior such as records, status and setting. The LCD screen is normally unlit, but
pressing the
VIEW
key will display the digest screen and pressing any key other than
VIEW
and
RESET
will display the menu screen.
These screens are turned off by pressing the
RESET
key or
END
key. If any display is left for 5
minutes or longer without operation, the back-light will go off.
LED
There are 8 LED displays. The signal labels and LED colours are defined as follows:
Label Color Remarks
IN SERVICE Green
Lit when the relay is in service.
TRIP Red
Lit when a trip command is issued.
ALARM Red
Lit when a failure is detected.
TESTING Red
Lit when disabling automatic monitoring function or resetting the
time counting of THR and V/F elements by the scheme
switches.
(LED1) Red Configurable LED to assign signals with or without latch when relay operates.
(LED2) Red Configurable LED to assign signals with or without latch when relay operates.
(LED3) Red Configurable LED to assign signals with or without latch when relay operates.
(LED4) Red Configurable LED to assign signals with or without latch when relay operates.
LED1 to LED4 are configurable.
The TRIP LED lights up once the relay is operating and remains lit even after the trip command
goes off. The TRIP LED can be turned off by pressing the
RESET
key. Other LEDs are lit as
long as a signal is present and the
RESET
key is invalid while the signal is being maintained.