Installation guide

LMU Users Guide

V1.0.6 December 10 2009

- 91 - CalAmp Proprietary & Confidential

The Trimble ASCII Interface Protocol (TAIP) is a Trimble-specified digital communication

interface based on printable ASCII characters. TAIP was designed specifically for vehicle

tracking applications using the Trimble asset tracking products. It has, however, been

expanded upon by several companies to meet the needs of their specific devices. The

CalAmp LMU-4100 is included among these devices. TAIP supports both scheduled and

polled responses.

CalAmp LMU Interface – TAIP

Only the LMU-4100™ and LMU2500™supports the TAIP interface.

12.1

12.1.1 General Sentence Structure

TAIP Sentences

All TAIP communications use printable, uppercase ASCII characters. The interface provides

a means to configure the LMU to output various sentences in response to queries or on a

scheduled basis. Each TAIP sentence has the following general format:

>ABB{C}[;ID=DDDD][;*FF]<

• >

This character represents the start of a TAIP sentence.

• A

Message Qualifier. The Message Qualifier describes the action to be taken on the

message. The LMU supports the following qualifiers:

• The ‘Q’ qualifier can be used at any time the TAIP interface is active to query for

the report messages (i.e. ‘>QPV<’,r ‘>QLN<’ or ‘>QIO<’).

• The ‘F’ qualifier is used to command the TAIP interface to report the specified

reporting message at the interval specified. For example, ‘>FPV00300000<’

commands the LMU to report a ‘PV’ message every 30 seconds. The epoch field

in the ‘F’ qualified sentence is not supported and is ignored.

• The ‘D’ qualifier is used to command the TAIP interface to report the specified

reporting message at the distance, maximum interval and minimum interval

specified. For example, ‘>DPV001000000200

• The ‘R’ qualifier indicates that the sentence is the either the LMU’s automatic

report or response to a query.

0060<’ commands the LMU to

report a ‘PV’ message every 60 seconds or 200 meters but not any more often

than every 10 seconds. The epoch field in the ‘D’ qualified sentence is not

supported and is ignored.

• BB

Message Identifier. The message identifier represents the type of message. The

CalAmp LMU currently supports the LN, PV and IO sentences. Please see the

sections below for the details on each.

• {C}

Message Body. A data string composed of one or more fixed length fields. The