Page 1
GPS-L5
GPS-L10
User Manual
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MoTeC GPS- L5/L10 User Manual
Contents
Using the GPS .......................................................................... 1!
Description ...........................................................................................1!
Mounting .............................................................................................. 1!
Electrical Connections.......................................................................... 2!
GPS Configuration ............................................................................... 2!
Software Version.................................................................................. 3!
M84/M400/M600/M800/M880 ECU Setup ........................................... 3!
ECU Data Logging Setup..................................................................... 3!
ADL3/SDL3 Dash Setup ...................................................................... 4!
ACL/ADL3/SDL3 Data Logging Setup .................................................4!
GPS Operation..................................................................................... 4!
Data Analysis ....................................................................................... 5!
Specifications........................................................................... 6!
Copyright 2011 – MoTeC Pty Ltd
The information in this document is subject to change without notice.
While every effort is taken to ensure correctness, no responsibility will be taken for the
consequences of any inaccuracies or omissions in this manual.
V 1.0, 31 August 2011
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MoTeC Using the GPS 1
Using the GPS
Description
The GPS-L5 is a 5 Hz GPS unit, set at a fixed baud rate of 19200 and is
preconfigured to suit MoTeC ‘Hundred Series’ and M84 ECUs.
The GPS-L10 is a 10 Hz GPS unit suitable for use only with MoTeC
Dash/Data Loggers (excluding original ADLs). It is configured at a fixed baud
rate of 38400.
Both are suitable for the high dynamics of motor sport applications. The units
have a built in antenna and provide speed and position information, as well as
altitude, heading, date, time and GPS statistics.
In circuit racing, a GPS unit can be a cost effective alternative to the
traditional lap timing system. When using a MoTeC Dash/Data Logger, the
position of the start/finish line can be marked either by a push button operated
by the driver when passing the line or by entering the coordinates directly into
the data acquisition system. This position can then be used by the Dash/Data
Logger as a beacon to calculate the lap time and by the data analysis
software to indicate the start of each lap.
The speed information can be used for display and logging purposes,
eliminating the need for wheel speed sensors. This is particularly useful for
marine applications as there are no wheel speeds available.
GPS position information can be used in MoTeC's i2 data analysis software to
show and compare the driven lines and to create track maps. The driven lines
can also be plotted over a Google Earth image, allowing circuit racers and
rally drivers to see the path travelled in a real life context.
Mounting
The GPS unit has an integrated antenna and should be mounted on an
external horizontal surface that has a clear view of the sky. The unit should be
mounted away from sources of interference including other antennas.
If mounting on a non metallic surface it may be necessary to add a metallic
ground plane under the unit to improve the signal level. The ground plane
should be at least 150 mm (6 in) square and may be made of aluminium or
steel.
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2 Using the GPS
Electrical Connections
The GPS unit sends data to the logging device via an RS232 serial
connection.
The wiring between the GPS connector and the logging device should be as
short as possible, preferably less than 1 m (3 ft).
The following table shows how to wire the GPS unit to a number of MoTeC
logging devices.
GPS
Pin
GPS
Name
Logging
Device
Pin
Name
ADL3
SDL3
ACL
M84/M400/M600/
M800/M880 ECU
1
Bat -
Bat -
7
4
Bat- from
VIM/SVIM
15
2
TX
RX
79
34
15
18
3
RX
Not
Used
- - -
-
4
5V
5V
18
etc
14
Requires 5V
from
VIM/SVIM
9
Note that the ADL3 and SDL3 logging devices only have one serial
connection therefore if an ECU is to be connected then it must be connected
via CAN. (Note that not all ECUs have a CAN connection)
GPS Configuration
The GPS-L10 comes preconfigured from MoTeC to suit MoTeC data loggers.
The GPS-L5 comes preconfigured to suit MoTeC’s ‘Hundred Series’ and M84
ECUs.
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MoTeC Using the GPS 3
Software Version
The MoTeC device must be running the following software version (or higher)
SDL3 Version 2.2 or higher
ADL3 Version 5.2 or higher
ACL Version 1.1 or higher
M84 Version 1.10K2 or higher
M400/M600/M800/M880 Version 3.51U2 or higher
M84/M400/M600/M800/M880 ECU Setup
Ensure you are using the GPS-L5 unit. In the relevant MoTeC ECU Manager
software on the Adjust menu click General
Setup>Communications>RS232 Telemetry Setup
o Enter Telemetry Baud Rate 19201
o Enter Telemetry Data Set 0 to turn the dataset Off
The M84 and 'Hundred Series' ECUs only process channels with 16 bit
resolution. While logging, the 32 bit channels Time, Longitude and Latitude
will be split into two 16 bit values. When viewing the data, using i2 data
analysis software, the original 32 bit values will be reassembled.
ECU Data Logging Setup
In the relevant MoTeC ECU Manager software on the Adjust menu click
General Setup>Data Logging Setup>GPS
o Enter GPS Latitude HW 10
o Enter GPS Latitude LW 10
o Enter GPS Longitude HW 10
o Enter GPS Longitude LW 10
o Enter GPS Speed 10.
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4 Using the GPS
ADL3/SDL3 Dash Setup
In the relevant MoTeC Dash Manager software on the Connections menu
click Communications.
o Select RS232 in the list and then click Select
o Select GPS - Standard RMC GGA template and click OK
o Change the Baud Rate to 19200 (when using GPS-L5) or 38400
(when using GPS-L10) and click OK
ACL/ADL3/SDL3 Data Logging Setup
In the relevant MoTeC Manager software on the Functions menu click
Logging
o Log GPS Latitude, GPS Longitude and GPS Speed. The other
GPS channels are optional.
o The logging rate for all GPS channels should be set to 10 Hz when
using the GPS-L5 or if using the GPS-L10 set the logging rate to
20 Hz in the Logger.
GPS Beacon Setup
Please refer to CTN0003 Basic GPS Beacon Setup for procedure to setup or
change the GPS Lap Beacons in your MoTeC Dash Logger.
GPS Operation
In normal use the GPS unit should start operating within 15 to 45 seconds of
power up, however during first start-up or if the GPS has been moved to a
new location it may take up to 5 minutes before it gains satellite lock and
starts transmitting data.
To check that the GPS is operating correctly check the number of satellites
being received using the logging device Manager software.
The GPS requires a minimum of 4 satellites to function. Normally, however,
the GPS should see at least 7 satellites. If the GPS sees more satellites it will
improve accuracy and minimise satellite drop out.
Loss of signal may occur when the satellites are obscured by trees, buildings
or a bridge. The GPS will take a second or two to recover from this situation.
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MoTeC Using the GPS 5
Data Analysis
GPS data analysis requires i2 data analysis software version 1.02 or higher.
All GPS channels (speed, heading, altitude etc.) can be used in the usual way
including plotting on a graph.
The GPS position data (latitude and longitude) can also be used for the
following:
• To plot the actual path travelled on a GPS Track component
o On the Add menu select GPS Track
• To generate the conventional track map
o On Tools menu select Track Editor
o Select Generate Track and then GPS method
• To plot the path travelled over a Google Earth image
o On the File menu select Google Earth Export
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6 Specifications
Specifications
Electrical
Power Supply Voltage 4.0 to 6.0 V
Power Supply Current 38 mA Typical
Connections
Mating Connector Deutsch DTM06-4S
Pin Name Description
1 Bat - Connect to Battery Negative on the logging device
2 TX Connect to RX pin on logging device
3 RX Don't connect (this pin is only used for programming)
4 5V Connect to 5 V sensor supply on the logging device
Data
Output Type RS232
Output Levels -5 V / 5 V (nominal)
Baud Rate GPS-L5 19200 (MoTeC default)
Baud Rate GPS-L10 38400 (MoTeC default)
NMEA Sentences RMC, GGA (MoTeC default)
Physical
Antenna Built into GPS unit
Size 48 mm x 41 mm x 14 mm (1.9" x 1.6 x 0.55")
Weight 106 g (3.8 oz)
Cable length 3 m (10 ft)
Operating Temp -30 °C to +80 °C (-22 F to 176 F)
Mounting Magnetic base
GPS Performance
Update Rate 5 Hz (GPS-L5), 10 Hz (GPS-L10)
Satellite Channels 66
Reacquisition Time < 1 sec
Hot Start Time 2 seconds
Warm Start Time 33 seconds
Cold Start Time 35 seconds
Dynamics 4G
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