Update Documentation P44x/EN AD/E44
MiCOM P441, P442 & P444
Page 9/82
3.1.2 Relay rear panel
The rear panel of the relay is shown in Figure 2. All current and voltage signals, digital logic
input signals and output contacts are connected at the rear of the relay. Also connected at
the rear is the twisted pair wiring for the rear EIA(RS)485 communication port, the IRIG-B
time synchronising input and the optical fibre rear communication port (IEC103 or UCA2 by
Ethernet) which are both optional.A second rear port(Courier) and an interMiCOM port
are also available.
3.2 Introduction to the user interfaces and settings options
Keypad/
LCD
Courier Modbus
IEC870-
5-103
DNP3.0 UCA2
Display & modification of all
settings
• • • •
Digital I/O signal status • • • • • •
Display/extraction of measurements • • • • • •
Display/extraction of fault records • • •
Extraction of disturbance records
• •
•
(Floc in %)
•
Programmable scheme logic
settings
•
Reset of fault & alarm records • • • • • •
Clear event & fault records • • • • •
Time synchronisation • • •
Control commands • • • • • •
TABLE 1
3.6.3 Hotkey menu navigation
The hotkey menu can be browsed using the two keys directly below the LCD. These are
known as direct access keys. The direct access keys perform the function that is displayed
directly above them on the LCD. Thus, to access the hotkey menu from the default display
the direct access key below the “HOTKEY” text must be pressed. Once in the hotkey menu
the ⇐ and ⇒ keys can be used to scroll between the available options and the direct access
keys can be used to control the function currently displayed. If neither the ⇐ or ⇒ keys are
pressed with 20 seconds of entering a hotkey sub menu, the relay will revert to the default
display. The clear key C will also act to return to the default menu from any page of the
hotkey menu. The layout of a typical page of the hotkey menu is described below.
The top line shows the contents of the previous and next cells for easy menu navigation.
The centre line shows the function.
The bottom line shows the options assigned to the direct access keys.
The functions available in the hotkey menu are listed below:
3.6.3.1 Setting group selection
The user can either scroll using <<NXT GRP>> through the available setting groups or
<<SELECT>> the setting group that is currently displayed.
When the SELECT button is pressed a screen confirming the current setting group is
displayed for 2 seconds before the user is prompted with the <<NXT GRP>> or
<<SELECT>> options again. The user can exit the sub menu by using the left and right
arrow keys.
For more information on setting group selection refer to “Changing setting group” section in
the Application Notes (P440/EN AP).
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