APC SYMMETRA 990 - Manual (Page 19)

Configuration: How to Configure the System
Symmetra MW with External Bypass Static Switch Operation Manual - 990-1377D-001 15
 Change the touch-screen settings:
– Brightness: Place the finger on the indicator
and slide it left or right to the desired setting.
– Contrast: Place the finger on the indicator and
slide it left or right to the desired setting.
– Backlight mode: Select “Always on” or “Off
after inactivity”.
– Backlight timeout (minutes): Select the time
limit for turning off the screen backlight.
– Recalibrate Display: Press this button to
initiate the calibration of the screen.
Note: If the backlight mode is set to “Always on” this will reduce the lifetime of the display.
Note: If a display reboot is required, it can be achieved by recalibrating the display.
How to configure the Modbus Settings screen
The Modbus Settings screen allows monitoring of the UPS by a Building Management System (BMS).
 Press the Modbus Settings button on the User
Configuration screen to access the Modbus
Settings screen.
 Change the modbus settings:
– BMS modbus RTU address: The modbus
address of the UPS device.
– Baud rate: Select 9600, 19200, 38400, 57600,
or 115200.
– Parity: Select None, Odd, or Even.
 Press Apply Changes to complete the changes.