3M™ MicroTouch™ Controller RX142 Reference Guide

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3M Touch Systems, Inc. Proprietary Information

The format of the coordinate data depends on the last format command received by the

controller.

Null Command

Syntax:

<SOH>Z<CR>

Response:

<SOH>0<CR>

Positive response.

Description:

Queries the controller and waits for a response.

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>CcXxxx<CR>

where:

Cc

= 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. The output identity for the

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 Format Raw, Calibrate Raw, and Calibrate Extended

commands 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 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.