3M MicroTouch Near Field Imaging (NFI) Integration Manual - page 35
Troubleshooting
3M Touch Systems Proprietary Information
29
Interpreting the controller’s status lights
When you provide power to the touch screen controller, all four LED status lights
on the controller board (shown below) should illuminate briefly. The table below
recommends strategies for different status light characteristics.
LED
Characteristics
Strategies
DS1
Heartbeat/
Communication
Green, blinking light.
Should begin blinking within a couple of
seconds of powering up controller.
A dual purpose light:
Blinks about two times per second when
controller is idle.
Blinks faster rate when there is
communication between controller and
touch screen (e.g., when screen is
touched).
If DS1 is blinking and no other LEDs are
illuminated, no action is required.
If DS1 is not blinking, make sure power is
connected.
DS2
Valid Touch
Green light.
Illuminates briefly with every readable
touch to the screen.
If DS2 does not illuminate when the screen is
touched and DS3 does illuminate, see
“Strategies” for DS3 below.
If DS2 is flashing rapidly (faster than one per
second), the baseline may need to be reset
(see “Reset the baseline” on page 28).
DS3
Unreadable Touch
Red light.
Illuminates briefly when controller detects
an unreadable touch.
Occasional illumination of DS3 is not cause
for concern.
If DS3 is solidly lit the touch screen system
may be shorted out, improperly grounded or
have an inaccurate baseline. Rectify the
situation and reset the baseline.
If DS3 is illuminating often:
Make sure your hand is not resting on
screen or bezel.
If wearing gloves while touching the
screen, set sensitivity to higher setting.
DS4
Error Condition
Red light.
Illuminates steadily when controller detects
that baseline needs resetting.
Reset baseline, re-align the touch screen,
and power cycle the controller (see page 18
of this manual or the NFI software guide
applicable for your operating system).
Work through “Strategies” on page 27.
If problem persists and sensitivity is set at 1,
try changing sensitivity to a higher setting. If
that does not resolve the error, contact 3M
Touch Systems technical support.