GEK-113308
MIWII Directional Power Protection System
2-19
2 PRODUCT DESCRIPTION
2.11 USER INTERFACE
2
2.11.2 KEYPAD AND DISPLAY
A five-button keypad allows access to MIWII relay information and settings changes. Measurement data (actual values),
five last trip information (fault reports) and settings are shown on the 16x2 character LCD display.
The keypad includes the functionality to modify the contrast of the display (refer to Chapter 8 for details).
The event list, oscillography, I/O and logic configuration can be accessed only from the ENERVISTA MII SETUP program.
2.11.3 COMMUNICATION PORTS
The front RS232 and the rear RS485 port provide interface with the relay. All serial ports use the Modbus® RTU protocol
and may be connected to system computers with baud rates from 300 to 19200 bps. Up to 32 MIWII relays can be
connected (daisy-chained) on the same communication circuit. Each relay must be assigned a different Modbus Address
(using a setting) if multiple relays are connected on the same circuit.
2.11.4 SOFTWARE
MIWII units are supplied together with ENERVISTA MII SETUP software, a Windows
®
based software that allows
communication with the relay for data viewing and retrieval, as well as oscillography, I/O configuration and logical
configuration (in models where these features are available).
