AccuTouch Product Guide - Elo TouchSystems

3000U USB Controller
The 3000U controller has two LED status indicators.
A green LED (D1) indicates controller status as follows:
LED Blink Rate Function
Once per second Normal condition, untouched state
On continuously Touched state
Twice per second Error detected
A second LED (D6) indicates USB status as follows:
LED State Function
OFF Controller is not enumerated on USB
ON Controller is enumerated on USB, but there is no data transfer
Blinking USB data transfers between controller and host are occurring
2201 PC-Bus Controller
The E271-2201 PC-Bus controller has three diagnostic LED’s. Following
power on, the controller performs its self-test. After the self-test, a flashing
green LED indicates normal operation. If a fatal error was encountered, the
yellow and red LED’s flash an eight-bit error code starting with the most
significant bit, where yellow indicates a binary ‘0” and red a binary ‘1’. See the
SmartSet Touchscreen Controller Family Technical Reference Manual
available at www.elotouch.com/support/dwnldmnls.asp, or contact Elo
Technical Support for a list of error codes.
During normal operation, the yellow LED indicates controller/host
communication is in progress. For example, when the touchscreen is touched,
the yellow LED should light or flicker (may not be visible with bus controllers
on fast PC’s). If the host does not remove the packet from the controller, the
LED will stay lit.
If the yellow LED lights without a touch, the touchscreen or cabling may be
shorted. Disconnect the touchscreen cable from the controller and cycle power
to the controller to verify this condition.
A constant red LED indicates a warning error condition, such as improper
communication from the host. Suspect the baud rate or other communication
parameters.
A-77