Chapter 1 – Introduction
GLC2400/2500/2600 Series User Manual
1–18
1.4.8 Backlight Burnout Detection Feature
When the GLC unit’s backlight burns out, it will be automatically detected. The
GLC unit’s Status LED will alert you that the backlight is burned out so that you
can disable GLC Touch Panel Operation and prevent a possible GLC operation
error. When Backlight Burnout is detected the GLC unit’s Status LED will turn
orange. Also, the system data area’s Status bit10
*1
will turn ON.
For details about touch panel operation when the backlight burns
out, see Section
6.4.3 – “Touch Panel Settings
.”
Since the GLC monitors current consumption to detect if the backlight
has burned out, in certain cases detection may not be possible.
When a major logic program error occurs, depending on the
type of error, the LED turning red can become a priority.
In some cases, even though a backlight burnout has been
detected, the backlight may remain faintly lit. In this case,
change the backlight as quickly as possible.
1.
When using the Direct Access method, bit +6 will turn ON. The using Memory Link
method, bit 11 will turn ON.
For details, refer to the
GP-PRO/PBIII for Windows Device/PLC
Connection Manual
(included with the screen creation software)