48    3M™ Multi-Touch Chassis Display User Guide 
 
3M Touch Systems, Inc. Proprietary Information – TSD-39373B 
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. 
Unit Type 
<SOH>UT<CR> 
Responds with an 8-character identity string. This string identifies the type of controller 
currently attached to the system, lists the features supported by the controller, and outputs 
the status of the controller hardware (a self-test code). 
Returns an identification code up to 8 ASCII characters in the following format: 
<SOH>TtFfffSs<CR> 
where: 
Tt = 
Two ASCII characters that identify the controller type. 
AD   Indicates the PX series of controllers 
fff  =  Four ASCII characters that indicate the features supported by the 
controller. 
****  Indicates no additional features configured 
Ss  =  Two ASCII characters that provide status information about the 
controller hardware. The two characters represent one byte. Each 
character is in the range 0 to 9 and A to F. 
Table 2 defines the meaning of each bit in the status byte. Each bit 
can be set to 1 or 0, where 1 = an error and 0 = no error. So a 
response of: 
 
00 = No diagnostic errors (normal response) 
The PX running with no errors returns the following string: 
<SOH> AD****00 <CR> 
The format includes two bitmapped ASCII hex status bytes.   A “00” indicates no errors.   
Table 20.  Bit Meanings in Status Byte 
Bit   Description  Notes 
0 Not used