Qs840A System Controller; Overview - ABB CPS6000 Product Manual

7A QS840A System Controller

Overview

The QS840A Controller provides system monitoring and control features, as well as office alarm
outputs from rectifiers, LVD boards, and remote modules. This section describes the controller
features, functions and alarms.
Controls and Display
Figure 7-1 shows the front panel controls and display of the controller.
Amps Display
Volts Display
Previous Menu
The backlight of the four-line LCD display changes color to reflect the system alarm status as follows:
Green Normal
Amber Minor Alarms Present
Red Major Alarms Active
The up and down arrow keys can be used to adjust screen contrast when the controller is displaying
the default screen.
Menu>Configuration>System Settings. At the default menu, the left and right arrows are also used to
toggle the display from displaying the system voltage or the system load current.
Otherwise, the left and right arrow keys are used to navigate the menus and the up and down arrow
keys are used to change values when configuring the system. A black box highlighting a menu item
indicates that the item has sub-menus.
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Figure 7-1: QS840A Controller Faceplate
Contrast adjustment
Display
Showing Default Screen
Display Menus
Save Changes
Refresh
Arrow Keys
Navigate Menus (up, Down left right)
Adjust Values during Configuration
is also available through the menus at