140 Rockwell Automation Publication 2711P-UM007D-EN-P - December 2015
Chapter 7 Troubleshooting
Display Issues
The display is unreadable or dims unexpectedly.
ATTENTION: If the display darkens, or if the backlight is not functioning
properly, the screen can be difficult to read and use of this touch screen
could result in a potentially hazardous outcome. Do not use the touch
screen under these circumstances. The design of the system must take
into account the possibility of the touch screen losing functionality and
unable to be used to maintain or change control of the system. The touch
screen shall not be the single point of control of critical functions and is not
intended to replace an E-stop.
Design of the system should follow all applicable code and good engineering
practice. Factors to consider include:
• The possibility of an unreadable touch screen
• The possibility of an inoperable touch screen
• Unexpected communication errors or delays
• Operator error in the control of the system
• Proper use of E-stops and other safety practices
The user shall provide means to achieve a safe state during anomalies and
make sure the system has adequate redundancy for critical functions.
Failure to follow these instructions can result in death, serious injury,
or equipment damage.
Table 37 - Dim Display
Check For See These Pages
Low display brightness setting page 61 or page 88
Low brightness level of screen saver page 62 or page 89
Temperatures outside the operating range page 70 or page 91
TIP Extend the life of the backlight by reducing the display brightness, by using
the screen saver with reduced brightness, or operating at lower
temperatures.
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