Trimble Outdoors SK8 User Manual

Page 174

Advertising
background image

C-28

Lassen-SK8 Embedded GPS Module

Trimble ASCII Interface Protocol (TAIP)

C.23.3 The Set Qualifier

The set (S) qualifier enables the user equipment to initialize/set-up various types of data in
the GPS unit. The format is:

>SAA[{B}][;ID=CCCC][;*DD]<

where AA is the two character message identifier and {B} specifies the data string within
the message. For the format of {B}, please refer to the message definitions in the previous
section. Note that all the messages have very specific formats and are length dependent.
Messages normally supported by the set qualifier are AL, AP, CP, DC, DD, ID, IP, LN,
PT, PV, RM and TM (the Placer GPS/DR does not support the set qualifier for the AP
message).

The set qualifier may be used with the AL, CP, LN, or PV message to set more precise
initial position data into the GPS sensor than can be set with the IP message.

C.23.4 Sample Communication Session

The following is a sample communication session to illustrate how message qualifiers are
used. Query the sensor for version number for the TAIP firmware:

>QVR<

The sensor responds with a message in the following form:

>RVR OEM SK8 OEM STTP APP; VERSION 7.52 (05/23/97);*38<

*

Note – The sensor identified its product name, firmware version number, core signal
processing version number, and release dates, then included the checksum for the
message (the default for the CS Flag is TRUE). Also notice that the sensor did respond to
our query even though we did not send a checksum.

Query the sensor for its ID number:

>QID<

The sensor will respond (assuming factory default settings):

>RID0000;*70<

Set the ID to match the number for a vehicle in your fleet and then tell the sensor to
include the Vehicle ID in its responses:

>SID1234<

>SRM;ID_FLAG=T<

Advertising