EXII-7720SC 3M, EXII-7720SC Datasheet - Page 23

• 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

3M™ MicroTouch™ Controller EX Serial Reference Guide
Response:
Calibrate Raw
Syntax:
*The coordinates are in video terms, with the origin (0, 0) in the upper left corner of the sensor. Examples from the
controller’s perspective, however, place the origin at the lower left corner of the sensor (numbers in brackets). The
controller outputs 0 to 64K on both axes independent of display screen resolution.
The Calibrate Extended command then positions the first calibration target inward from
the lower left corner and the second calibration target inward from the upper right corner.
The following illustration shows how the calibration targets are calculated.
Calibrate Extended Procedure
To use the CX command:
1. Enter the Calibrate Extended (CX) command. The controller sends an initial
2. Touch the sensor at a lower left target, which is located 12.5% (1/8) in from the
3. Touch the sensor at an upper right target, which is located 12.5% (1/8) in from the
Touching the two valid calibration points results in a successful calibration. If either
calibration point is invalid, the calibration fails. The EX122 and EX112 controllers
restore the previous calibration values. If the Calibrate Extended failed, repeat the CX
process.
<SOH>1<CR>
Indicates that the controller received a valid touch coordinate (point) when the target was
touched. Two valid touch points indicate a successful calibration.
<SOH>0<CR>
Indicates that the touch point is out of range of the expected target area. If you receive a
negative response, you must start over again.
No Response
Indicates that you did not touch the target long enough to provide an accurate calibration
point.
<SOH>CR<CR>
acknowledgment of <SOH>0<CR>.
corner of the video image. The controller returns an acknowledgment of
<SOH>1<CR>. This is a positive response. If you receive a negative response
<SOH>0<CR>, you can cancel the calibration by issuing a Reset command and then
start over again.
corner of the video image. The controller returns an acknowledgment of
<SOH>1<CR>. This is a positive response. If you receive a negative response, you
must start over again.
3M Touch Systems, Inc. Proprietary Information
Positive response.
Negative response
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