Areva MiCOM P921 - 2. Introduction to the User Interfaces and Settings Options

P92x/EN FT/E11 Technical Guide
User Guide
Page 6/110 MiCOM P921-P922-P923
2. INTRODUCTION TO THE USER INTERFACES AND SETTINGS OPTIONS
The relay has three user interfaces:
· the front panel user interface via the LCD and keypad.
· the front port which supports ModBus communication.
· the rear port which supports one protocol of either Courier, Modbus or
IEC60870-5-103. The protocol for the rear port must be specified when the relay
is ordered.
The measurement information and relay settings which can be accessed from the
three interfaces are summarised in Table 1 below.
Keypad/LCD Courier ModBus IEC60870
Display & modification of
all settings
···
Digital I/O signal status
··· ·
Display/extraction of
measurements
··· ·
Display/extraction of fault
records
···
Display/extraction of
event & alarm records
··· ·
Extraction of disturbance
records
·· ·
Programmable logic
equations
···
Reset of fault & alarm
records
··· ·
Clear event & fault
records
···
Time synchronisation
·· ·
Control commands
·· ·
TABLE 1 : ACCESSIBLE INFORMATION