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Revision: 03 Jul y 7, 2007
TrimFleet DRU Plus and TrimFleet APU - Installation Instructions Trimble Mobile Solutions, Inc.
July 7, 2007
Revision 03
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Corporate Office Trimble Mobile Solutions, Inc. 3650 Concorde Parkway Suite 150 Chantilly, VA 20151 U.S.A. Phone: +1-703-502-8125 Fax: +1-703-502-8165 www.trimblems.com
Support Offices Trimble Mobile Solutions, Inc. 7850 S. Hardy Drive Suite 122 Tempe, Arizona 85284-1121 U.S.A. Phone: +1-480-940-6500 Toll Free: +1-877-883-4367
CONFIGURING DRU PLUS AND APU TO OUTPUT NMEA ......................................................... 7
TrimFleet DRU Plus and TrimFleet APU - Installation Instructions Trimble Mobile Solutions, Inc.
July 7, 2007
Revision 03
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1. DESCRIPTION This document contains hardware installation instructions for the TrimFleet DRU Plus and TrimFleet APU. For information on product configuration, refer to the TrimFleet DRU Plus and APU Users Manual. For DRU Plus installations, vehicle specific information regarding Vehicle Speed Sensor type and location as well as detailed back-up light circuit information can be obtained in the vehicle manufacturer’s service manual.
2. PRODUCT OVERVIEW The TrimFleet DRU Plus and TrimFleet APU will operate from 9 volts to 32 volts. Both products have an input for vehicle ignition sense that powers the unit only when the vehicle's engine is running. This input is pulled down internally and must be driven high to be activated. The GPS almanac and ephemeris information stored in RAM is kept alive by using the vehicle’s battery when the ignition is off. This allows for a faster time to first GPS position. The GPS receiver will have to re-acquire the satellite information only after power is completely removed from unit. Both the DRU Plus and APU contain a 12-channel GPS receiver. In addition to this receiver, the DRU Plus has an internal angular-rate sensor module. Because the DRU Plus uses this sensor, the physical orientation of DRU Plus must be in the horizontal position. The DRU Plus has an input for a back-up (reverse) light indicator to determine if the vehicle is in reverse. This input is pulled down internally and must be driven high to be activated. The DRU Plus has separate connections for analog (sine) or digital (pulsed) vehicle speed sensors. The 12-channel dead reckoning GPS module used in the TrimFleet DRU Plus is self-calibrating. Once installed in a vehicle and driven for a short distance, the unit will automatically self-calibrate from the first GPS 2D measurement onward. The system shall be fully calibrated when: •
GPS is navigating uninterrupted during 60 seconds
•
Speed during these 60 seconds is > 8m/s or 18 miles per hour
•
100 right hand turns have been performed
3. EXTERNAL DOCUMENTATION TrimFleet DRU Plus and APU Users Manual TrimFleet DRU Plus Product Specification TrimFleet APU Product Specification TrimFleet DRU Plus and APU Motorola XTL Radio Interface Guide
TrimFleet DRU Plus and TrimFleet APU - Installation Instructions Trimble Mobile Solutions, Inc.
July 7, 2007
Revision 03
1
10.
FUNCTIONAL CHECKOUT
10.1. GPS Functional Check
Start the vehicle and check the LED indicators for status.
Confirm that unit’s green LED is on. This indicates that the unit is powered up.
Check the red LED for the GPS status in the table below.
NOTE: The vehicle ignition must be ON for full operation of the device.
Red LED State
GPS Status
Rapid blinking
GPS antenna is open or shorted
Slow blinking
An insufficient number of satellites have been acquired to provide an accurate position
On continuously
Current position has been computed and the unit is tracking
10.2. Quick Dead Reckonin g Check (DRU Plus onl y) Once a DRU Plus has been installed and has valid GPS information, it will begin to self-calibrate as described in the Product Overview section. The unit must be powered up and calibrated with the ignition switch on before checking the dead reckoning function. Perform the following steps to check if the dead reckoning function is working. 1) 2) 3) 4) 5)
11.
Open a session using HyperTerminal on your computer. In HyperTerminal configure your computer’s serial port for 9600, 8, 1, N with no flow control. Connect your computer’s serial port to the unit’s MDT port using a straight through serial cable. Disconnect the GPS antenna from the unit. Query the unit for position and velocity information by typing >QPV<. The second to the last character of the response string indicates the position source. In dead reckoning mode this character is a 6 or 8. See the Users Manual for more information.
CONFIGURING DRU PLUS AND APU TO OUTPUT NMEA
The following procedure configures the DRU Plus or APU to output NMEA at 4800 baud on the MDT port. Other configurations may be found by referring to the TrimFleet DRU Plus and APU Users Manual. 1) Open a session using HyperTerminal on your computer. 2) In HyperTerminal configure your computer’s serial port for 9600, 8, 1, N with no flow control. 3) Connect your computer’s serial port to the unit’s MDT port using a straight through serial cable. Power up the DRU Plus or APU. 4) Type the following commands (do not type comments in parenthesis): a. >SRM;MC_FLAG=TRUE< (Set map compatibility) b. >SPT4800,8,1,N< (Sets baud rate for mapping Application) 5) Re-configure your computer’s serial port setting to 4800, 8, 1, N and then type the following commands: c. >SPR;NMEA=FT< (Enables NMEA output on MDT port) 6) Exit HyperTerminal session 7) Start your mapping application
TrimFleet DRU Plus and TrimFleet APU - Installation Instructions Trimble Mobile Solutions, Inc.