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1MRS 751107-MUM
Protection Relay
Operator’s Manual
REX 521
13
3.1.3.
Passwords
Fig. 3.1.3.-1
Password menus
Setting values are protected by passwords. There are two different passwords, one
for protecting the HMI setting values and another for protecting settings through
serial communication.
• The default value of the serial communication password is
001
and of the HMI
password
999
.
• The HMI password is not active until it has been changed from the default value.
After changing it, the relay prompts for password whenever the [E] button is
pressed in the setting value menu. Once the right password has been given, it
stays active until the display is returned to idle state by time-out. To disable the
HMI password, change it back to the default value
999
.
• In case a password is forgotten, the HMI password can be viewed and changed
via serial communication.
3.1.4.
Display backlight
The backlight of the display is normally off. When a button on the HMI is pressed,
the backlight turns on automatically and the panel is ready for further operations.
• At power up, the backlight is also turned on during the display test.
• After a time-out period (5 min), the backlight is automatically switched off if
there has not been any activity on the panel.
• When changing between Local/Remote mode by a digital input, the backlight is
turned on for 10 seconds.
3.1.5.
Display contrast
The display contrast is temperature compensated, which means that the contrast
automatically adjusts itself with temperature to preserve readability.
• To obtain optimal readability, the contrast of the display can be adjusted.
Pressing simultaneously the [E] button and [
↑
] or [
↓
] button increases or
decreases the contrast.
PWmenu_b
MODBUS
SPA FRONT
SPA REAR
LON
Tests
Measurements
Protection
ABB
Configuration
Power Quality
Cond. monit.
Comm. settings
DNP 3.0
Baud rate
= 9600 bps
SPA address
= 001
Slave status
=1
Configuration
Analog scales
Display
Digital Inputs
Rear port
Communication
Comm. settings
Password MMI
= 999
Control
Communication
IEC 103
Содержание REX 521
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