DPS NetGuardian 832A, Руководство пользователя

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LCD Display 7
Fig. 7.1. NetGuardian Front Panel LCD
The front panel LCD displays the current alarm and control status and provides a command menu for
controlling the NetGuardian's basic functions.
Using the LCD command menu
The four buttons surrounding the front panel LCD are used to access the LCD Command Menu. To
access the menu, press the Menu button. To scroll the menu, use the q and p buttons. To select a
menu command, press the Sel (Select) button.
Standard Prompt
When no Command Menu item is selected and no alarms or relays are active, the LCD displays the
firmware version and the standard prompt, Press MENU for front panel options.
Controlling Display Speed
The scroll speed can be temporarily increased by pressing and holding the p button while the message
is active.
Alarm and Control Status Messages 7.1
If an alarm or control relay is active, the LCD will display the following messages to indicate alarm and
control status. The LCD panel will display the following messages to indicate alarm and control status:
Discrete Alarms: If there are any standing discrete alarms, the display will read "Discrete
Alarms:", followed by the user-defined descriptions of the standing alarm
points.
Relays: If there are any latched relays, the display will read "Relays:", followed by
the user-defined descriptions of the latched relays.
Ping Alarms: If any ping targets have failed to respond within the specified time, the
display will read "Ping Alarms:", followed by the user-defined descriptions
of the ping targets.
Analogs: If any analog channels have crossed a threshold value, the display will
read "Analogs", followed by the user-defined description of the analog
channel, the channel's last voltage reading, and a letter indicating which
threshold the channel has crossed.
Analog thresholds are represented by the following characters:
Major Over:
a capital O
Minor Over: a lower-case o
Minor Under: a lower-case u