Omron NA5-12W series Hardware User Manual page 19

• To use numeric input functions safely, always make maximum and minimum limit settings.
• Do not press the touch panel with a force greater than 30 N.
• Do not use hard or pointed objects to operate or scrub the screen, otherwise the surface of the
screen may be damaged.
• The deterioration over time may cause the touch points to move on the touch panel. Calibrate the
touch panel periodically.
• A touch position detection error of approximately 20 pixels may occur due to the precision of the
touch panel. Always take this into account when positioning objects on the panel so adjoining objects
will not be activated by mistake.
• Confirm the safety of the system before pressing the touch panel.
• Do not accidentally press the touch panel when the backlight is not lit or when the display does not
appear or is too dark to identify visually.
• You can change the brightness by changing the setting such as in the system menu or by download-
ing project.
If the brightness is set to very dark, it causes flickering or unreadable screen. Additionally, the bright-
ness can be restored by transferring the project again after setting the property of the brightness
appropriately.
In a case of the applications where end users can control the brightness, create the applications so
as keeping on operations by such as assigning the function which restores the brightness to one of
function keys, if necessary.
• Signals from the touch panel may not be entered if the touch panel is pressed consecutively at high
speed. Make sure to go on the next operation after confirming that the NA Unit has detected the input
of the touch panel.
• The function keys have the restrictions as follows:
• When you use gloves or others, the function keys may not work correctly depending on the mate-
rial and thickness of the gloves. Take actual conditions of the gloves usage into considerations
prior to the system startup to perform the confirmation.
• The function keys do not work when covered with water. Remove the water completely before
use.
NA-series Programmable Terminal Hardware User's Manual (V117)
Precautions for Safe Use
17