3M Touch Screen Controller EX 111 Reference Manual page 13

3M™ MicroTouch™ Controller EX USB Reference Guide
The LED indicator also provides visual indication of the controller's internal self-tests by
flashing or blinking a code that may be interpreted using the table below. The test results
are also returned as part of the USB Status report. Those bits that result in a flashing error
code are repeated in the table below.
Some errors are fatal -- that is, normal sensor operation cannot occur. Others errors may
simply cause "default conditions" to be assumed and sensor operation may proceed. An
example of a non-fatal error is when default operating conditions are restored due to an
incorrect NOVRAM checksum: in this case, operation continues using factory default
conditions (as if a Restore Defaults Request had been issued).
Table 4. LED Diagnostic Codes for EX USB Controllers
Self Test LED
Condition Flashes
RAM Data 1
2
Error
RAM Code 2
2
Error
1
STRAY Error 3
3
NOV Error 4
1
HDW Error 5
Reserved 6
CABLE Error 7
NOV2 Error 8
Reserved 9
EEPROM 10
2
Error
NOV5 Error 11
NOV6 Error 12
NOV7 Error 13
Reserved 14
Self
Test
Bit Description
0 Data side checksum error
1 Firmware EEPROM
checksum verification error
2 Unable to initialize stray
cancellation
3 Parameters invalid (using
defaults)
4 Controller hardware failure
(phase/gain initialization)
5 Reserved
6 Cable NOVRAM
linearization data invalid
7 Controller NOVRAM
linearization data invalid
8 Reserved
9 EEPROM is not working
10 Controller ID is not valid
11 Interface configuration
values are not valid
12 Touch configuration values
are not valid
13 Reserved
3M Touch Systems, Inc. Proprietary Information -- 29489v05
What to do...
Reload program code.
Reload program code.
Replace controller. If error
reoccurs, might be a sensor
problem.
Restore defaults. If fault persists,
replace controller. If error reoccurs,
might be a sensor or cable
problem.
Cycle power. If fault persists,
replace controller.
At startup, the cable NOVRAM
error will flash the LED until the
controller receives a status
command from host.
Replace sensor or perform a 25-
point linearization. Contact
Technical Support.
Reload program code.
Restore defaults. If fault persists,
replace controller.
Restore defaults. If fault persists,
replace controller.
Restore defaults. If fault persists,
replace controller.
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