PREVOST H3-41 Manual page 63

Data Hub Hardware
The Data Hub hardware consists of a range of
products that the user can select to configure a
system that will meet their needs without requiring
investment in unwanted features. Conversely, this
modular approach allows the user to easily add
capabilities at a later date if requirements change.
All Data Hub hardware has a wide input voltage
range, which allows it to be powered directly by
sources of up to 24 volts.
DDEC III ELECTRONIC CONTROL
MODULE (ECM)
The simplest implementation of Data Hub does
not require the addition of any hardware to the
vehicle. Instead, basic Data Hub features built
into the DDEC III ECM are utilized. The ECM
stores data such as miles, fuel used, idle time,
PTO time, idle fuel, cruise time and cruise fuel on
a life-to-date, trip and daily basis. Daily recording
is limited to a maximum of two days.
Selected parameters, such as oil pressure, are
measured periodically under specified conditions.
The measurements are analyzed over long time
periods, which allows the system to detect
degradation in performance and warn the user
prior to component failure.
The average life of up to ten components may be
specified in terms of miles, fuel used, time, engine
RPM and engine hours.
specified factors and automatically alerts the user
when the average lifetime of the component has
been used. An event log is also stored which
indicates the vehicle status (e.g., off, idle, in
motion) at 15 minute intervals.
Data stored in the DDEC III ECM is extracted by
connecting a cable from a PC to the vehicle's
diagnostic connector via an RP1202 adaptor
module. Data extraction takes about 20 seconds.
Data Logger
A Data Logger may be added to the system to
expand the recording capability available from the
ECM. A range of memory capacities is planned
with up to a maximum of 640K possible. This will
allow expansion of daily recording to several
The ECM tracks the
months. Additional features are also available
when a Data Logger is included in the system.
The Data Logger adds an Event Log, which
details the date and time of various trip events
(e.g., trip legs and stops, speeding and idling
events, diagnostic messages).
recording documents 13 engine parameter values
for 1 minute prior to the occurrence of selected
diagnostic messages to aid in troubleshooting.
This is especially useful for diagnosing intermittent
conditions. Detailed incident recording stores
speed, RPM, brake, cruise and throttle status at 1
second intervals for a continuous 3 minute period
for use in incident reconstruction.
The Data Logger receives its data via the SAE
J1708 data link.
monitor and record data provided by any J1708
compatible device, such as a non-DDEC ECM, an
electronic transmission, anti-lock brakes (ABS) or
smart sensors. A battery-backed clock/calendar
is also included to provide accurate reference
points for recorded data. The current date and
time may also be requested via J1708 for use by
other devices.
The Data Logger
capability, which allows it to operate the Driver
Data Display and provides compatibility with a
variety of data extraction options. There is also a
digital output channel that may be used to drive an
audible or visual signalling device. It is designed
for installation
environment.
ProDriver(TM)
Prodriver (TM) is a dashboard-mounted graphic
device that displays and records operational data
transmitted by the Detroit Diesel Electronic
Controls (DDEC)
controlled engines on the SAE J1708 diagnostic
data link. ProDriver utilizes a vacuum fluorescent
(VF) display for wide viewing angles and excellent
visibility in all ambient light conditions. It provides
automated intensity control of the VF display,
based on the dashboard instrument panel lights
for improved driver convenience.
Prodriver has many driver friendly features
designed to provide instantaneous feedback to
the driver. This enables the driver to understand
the effect of actions on engine and vehicle
4-4
OTHER FEATURES
Detailed alert
This provides the ability to
has enhanced interface
in a moisture-protected
and other electronically