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3M™ Display M2256PW User Guide
3M Touch Systems, Inc. Proprietary Information
Output Identity
Syntax:
<SOH>
OI
<CR>
Response:
<SOH>ADXxxx<CR>
where:
AD
= Two ASCII characters that describe the type of 3M Touch Systems controller.
Xxxx
= 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. .
Soft Reset
Syntax:
<SOH>
R
<CR>
Response:
<SOH>
0
<CR> Positive response
.
Description:
Initializes the hardware and the firmware, causes the controller to stop sending data, and
recalculates the environmental conditions (for example, stray and offset values). The
Reset command also cancels the Calibrate command and returns the controller to normal
operation.
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 18 PX Factory Default Settings
Operating Parameter
Default
Baud Rate
115,200
Serial Communication Settings
N, 8, 1