3M™ Multi-Touch Chassis Display User Guide 47
3M Touch Systems, Inc. Proprietary Information – TSD-39373B
Use Z to determine that you are communicating with the controller or to make sure that a
utility is communicating with the controller. Using this command does not affect the
controller’s current operating parameters.
Output Identity
Syntax: <SOH>OI<CR>
Response: <SOH>ADXxxx<CR>
where:
D = Two ASCII characters that describe the type of 3M Touch Systems controller.
xxx = This is a unique identifier not necessarily the actual firmware revision number.
Description: Returns a 6-character identifier, which describes the controller type and the firmware
version number.
3M Touch Systems recommends that the host system issue a Reset command whenever
the host system is powered on and is attempting to establish communication with the
controller.
The amount of time needed to execute a Reset command is typically 500 milliseconds
with a defined maximum of 2000 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.
Restore Defaults
Syntax: <SOH>RD<CR>
Response: <SOH>0<CR> Positive response.
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.
The following table lists the factory defaults for the PX controller. The Restore Defaults
command is useful in situations where inadvertent commands to the controller have
rendered the sensor inoperative.
Table 19. PX Factory Default Settings
Operating Parameter Default
Baud Rate 115,200
Serial Communication Settings N, 8, 1
Data Format Format Tablet Multi-Touch
Operating Mode Mode Stream
Return to Factory Calibration Yes
Note: After you issue a Restore Defaults command, you must recalibrate your sensor.
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