8. How easyE4 works internally
8.6 Controlling the backlight with operands
8.6 Controlling the backlight with operands
8.6.1 Backlight intensity
Only for easyE4 base devices with a display.
easyE4 features three LE operands, LE1 through LE3. These operands are pro-
grammable outputs that can be used to control the device display's backlight. and
visually signal states on the display.
You can set two brightnesses within a value range of 0 to 100% on the easyE4 base
device: backlight intensity 1 and backlight intensity 2. The default settings are as fol-
lows: backlight intensity 1=100%, backlight intensity 2 = 50%. For more information on
how to configure this in the device menu, please refer to → "Display", page 621
You can use the LE1 output operand to set the backlight intensity to brightness 1 for
the device display in RUN mode. This means, for example, that you can set and clear
the LE1 and LE3 operands cyclically to produce a flashing effect.
You can use the LE2 output operand to set the backlight intensity to brightness 2 for
the device display in RUN mode.
LE3 turns the backlight off.
If the easyE4 base device switches to STOP mode, backlight intensity 1 will be react-
ivated as per the device menu setting.
If more than one operand out of LE1 through LE3 is set, the operand with the highest
priority will be used for the backlight setting.
Backlight intensity on device display LE01

LE02

LE03
Backlight intensity 1
1  0  0
Backlight intensity 2
0  1  0
Off
0  0  1
8.6.2 Background color
Available on easySoft V7.30 and higher with FW 1.20 and higher
Visualization devices feature additional outputs for controlling the device display's
color. These outputs are switched in the circuit diagram with output operands LE04
to LE06.
Background color on the device display LE04

LE05

LE06
red
1  0  0
Green
0  1  0
White
0  0  1
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easyE402/24 MN050009ENEaton.com
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