Rockwell Automation Allen-Bradley PanelView Plus 400, Руководство пользователя

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Publication 2711P-UM001D-EN-P - September 2005
Configuration Mode 4-21
Display Temperature
The Display Temperature screen shows the current temperature of the
display.
The 600 -1500 terminals have a CCFL (Cold-Cathode Fluorescent
Lamp) backlight. This backlight requires temperature control when
the internal temperature of the product is below 10 °C or above 60 °C.
For proper backlight operation, the terminal monitors low and high
temperature conditions.
•
If the internal temperature of the product is below 10 °C, the
backlight is set to overdrive or the full-rated current setting for at
least five minutes.
•
If the internal temperature is at or above 60 °C, the backlight is
set to underdrive; 40% or less of full brightness. This reduces
heat generation from the backlight.
Temperature monitoring begins when the terminal powers on, or
when the backlight turns on, for example, exiting screen saver mode.
The temperature control only affects display intensity; it does not
restrict the use or operation of the terminal.
When a low or high temperature condition is detected, an error is sent
to the system event log. If the temperature control is not functioning,
a noncritical error is sent to the system event log but the terminal
continues to operate normally.
TIP
The CCFL backlight temperature control takes
precedence over the application Backlight Settings.
Terminal Settings
Display
Display Temperature