GLC2400/2500/2600 Series User Manual
13
Preface
About the GLC Unit’s Display Panel
•
The data that is currently displayed on the GLC unit’s screen, the screen’s
brightness, and the GLC unit’s voltage
*1
each affect the screen’s inten-
sity of
Contouring
— wavelike pattern that is created when some parts
of the screen are brighter than others.
•
The minute, dark and light grid-points on the display panel’s surface are
part of the GLC unit’s design and are not defects.
•
Extended shadows, or “crosstalk,” may appear on the sides of screen
images. This is normal for an LCD panel.
•
Sometimes the display area may look as if the display colors have
changed. This is a common attribute of LCDs and is not a defect.
•
Displaying a single image for long periods of time can cause an afterim-
age to remain when the screen display is changed.
To prevent this effect:
Use the GLC unit’s “Standby Mode,” which automatically turns the
screen OFF when no input is entered within a specified period of
time.
Section 6.3.1 – “System Setup”
•
Write “FFFFh” to the System Data Area’s “Screen Display Off” address
*2
to turn the screen display OFF when the following actions are not per-
formed within the user-specified period of time.
•
Change Screen
•
Touch Screen
•
Alarm Display
Do NOT display any single screen for a long period of time. Try to
change the screen display periodically.
1.
The backlight’s brightness may vary or its lighting may be delayed if the voltage
provided is low — even if still within the range of rated voltage listed in the specifica-
tions. When the voltage is high, the backlight’s lifetime may be shortened. As a rule,
voltage should be within five percent (5%) of rated voltage.
2.
The following addresses assume all System Data Area settings are entered. If they are
not all entered, the correct word address may be different, since the following ad-
dresses are relative, not fixed, addresses.
With the Direct Access Method — use System Data Area word a9
With the Memory Link Method — use System Data Area word a12
GP-PRO/PBIII for Windows Device/PLC Connection Manual