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

• Manufacturer Part Number: EXII-7720SC
• Description: CONTROLLER EX II SER CAPACITIVE
• Manufacturer: 3M
• Series: MicroTouch™ Controller EXr

Specifications of EXII-7720SC

• Accessory Type: Touch Screen - Controller
• Operating Supply Voltage: 5 VDC to 12 VDC
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 40 C
• Connector Type: RS232
• Rohs Compliant: Yes
• For Use With/related Products: Touch Screen Capacitive
• For Use With: 3M5754 - TOUCH SCREEN CAPACITIVE 12.31"3M5752 - TOUCH SCREEN CAPACITIVE 19.75"3M5750 - TOUCH SCREEN CAPACITIVE 20.65"3M5748 - TOUCH SCREEN CAPACITIVE 17.54"3M5747 - TOUCH SCREEN CAPACITIVE 6.71"3M5745 - TOUCH SCREEN CAPACITIVE 15.68"3M5744 - TOUCH SCREEN CAPACITIVE 10.83"3M5527 - TOUCH SCREEN CAPACITIVE 31.80"3M5526 - TOUCH SCREEN CAPACITIVE 20.65"3M5525 - TOUCH SCREEN CAPACITIVE 19.75"3M5524 - TOUCH SCREEN CAPACITIVE 17.54"3M5523 - TOUCH SCREEN CAPACITIVE 15.68"3M5522 - TOUCH SCREEN CAPACITIVE 12.31"3M5521 - TOUCH SCREEN CAPACITIVE 10.83"3M5520 - TOUCH SCREEN CAPACITIVE 8.75"3M5519 - TOUCH SCREEN CAPACITIVE 6.71"
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 3M5540

14
Note 1: this is a fatal error.
Note 2: this error is detected by the ROM code
Note 3: indicates that the EEPROM is not formatted when given by the ROM code
Self Test
Condition
RAM Data
Error
RAM Code
Error
STRAY Error
NOV Error
HDW Error
Reserved
CABLE Error
NOV2 Error
Reserved
EEPROM
Error
NOV5 Error
NOV6 Error
NOV7 Error
Reserved
Resistance
Error
Backplane
Error
Corner Error
Fixed Cal Error
2
2
2
3
1
1
Table 4 LED Diagnostic Codes for EX Serial Controllers
LED
Flashes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
3M Touch Systems, Inc. Proprietary Information
Self
Test
Bit
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Description
Data side checksum error
Firmware EEPROM
checksum verification error
Unable to initialize stray
cancellation
Parameters invalid (using
defaults)
Controller hardware failure
(phase/gain initialization)
Reserved
Cable NOVRAM
linearization data invalid
Controller NOVRAM
linearization data invalid
Reserved
EEPROM is not working
Controller ID is not valid
Interface configuration
values are not valid
Touch configuration values
are not valid
Reserved
Sensor resistance is out of
supported range
Low resistance path from
backplane to sensor
Corner drive offset level is
too high
Fixed 2-point cal error high
3M™ MicroTouch™ Controller EX Serial Reference Guide
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.
Cycle power. If fault persists,
replace sensor.
Cycle power. If fault persists,
replace sensor.
Cycle power. If fault persists,
replace controller.
Cycle power. If fault persists,
replace controller.