EXII-7720SC 3M TOUCH SYSTEMS, EXII-7720SC Datasheet - Page 14

• Manufacturer Part Number: EXII-7720SC
• Manufacturer: 3M TOUCH SYSTEMS

Specifications of EXII-7720SC

• Operating Temperature (min): -40C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / Rohs Status: Compliant

14
Status Light (LED) Diagnostics
Flashes Error Description
1
2
3
4
5
6
7
8
9
10
11
12
Reserved.
Reserved.
Setup error. Unable to establish operating
range at power-up. Nonrecoverable error.
Controller NOVRAM error. The
operating parameters in the controller
NOVRAM are invalid. Using defaults.
HDW error. The controller hardware
failed (unable to initialize or load
program). Nonrecoverable error.
Reserved.
Cable NOVRAM error. The linearization
data in the cable NOVRAM is invalid.
Controller NOVRAM error. The
controller linearization data in NOVRAM
is invalid.
Reserved
Controller EEPROM not formatted
Invalid controller block 5
Invalid controller block 6
3. Adjust the horizontal and vertical position controls on the monitor to center the image
3M Touch Systems controllers are highly reliable units; however, there may be occasions
when the controller does not perform exactly as you expected. The EX II controller
provides diagnostic feedback with a light emitting diode (LED) on the component side of
the board that indicates the status of the touch screen unit.
If the LED is on, and remains dimly lit, the controller has power and is operating
properly. If the LED is off, the controller is not receiving power.
When you power-up the unit, the LED is bright until the controller start-up sequence is
completed. Following start-up, the LED becomes dim and remains dim as long as you do
not touch the touch screen. When you touch the touch screen, the LED becomes bright as
long as a touch is detected.
A flashing (or blinking) LED during power-up indicates the controller’s power-on
self-test failed. Refer to Table 2 for a description of each error code.
Table 2 LED Diagnostic Codes for EX II Controllers
on the screen.
3M Touch Systems Proprietary Information
What to do...
Replace controller. If error reoccurs, might be a
touch screen problem.
Restore defaults. If fault persists, replace
controller. If error reoccurs, might be a touch
screen or cable problem.
Replace controller.
At startup, the cable NOVRAM error will flash
the LED until the controller receives any valid
command from host.
Replace touch screen or perform a 25-point
linearization. Contact Technical Support.
Reload program code
Not applicable to serial controller.
Restore defaults if possible, otherwise replace
controller.
EX II Serial Controllers Reference Guide