EX II 3000SP Controller Communications

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The amount of time needed to execute a Reset command ranges from 225 milliseconds to 800 milliseconds. Therefore, the application program should wait and be sure it receives the command response before issuing another command to the controller following the reset.

Response: <SOH>0<CR> Positive response

Restore Defaults

Syntax: <SOH>RD<CR>

Description: Returns to the factory default operating parameters. The Restore Defaults command copies the 3M Touch Systems factory default parameters from ROM to the non-volatile memory (NOVRAM) and then executes a Reset command.

Table 10 lists the factory defaults for the EX II 3000SP controller. The Restore Defaults command is useful in situations where inadvertent commands to the controller have rendered the touch screen inoperative.

Table 10 EX II 3000SP Factory Default Settings

Operating Parameter

Default

Baud Rate

9600

Serial Communication Settings

N, 8, 1

Data Format

Format Tablet

Operating Mode

Mode Stream

Return to Factory Calibration

Yes

The Restore Defaults command requires approximately 75 to 100 milliseconds, plus the execution time of the Reset command (225 to 800 milliseconds). Therefore, the application program should wait and be sure it receives the command response before issuing another command to the controller.

After you issue a Restore Defaults command, you must recalibrate your touch screen using a 2-point calibration.

Response: <SOH>0<CR> Positive response

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