CADET: Control & Automation Automotive Software Overview


♪ [music] ♪ CADET is a control and test automation
system for those who demand precision. In this video, you’ll get an overview of
Sierra’s CADET control and test automation system, an industry leading control and
automation package, first developed in the 1980s. Today, CADET has emerged as one of
the most flexible systems of its kind. Sierra designs and manufactures all
hardware and writes all software in-house. Sierra is committed to continually improve
and adapt CADET hardware and software to support the cutting edge innovation of our
customers around the world. CADET serves engine, power train,
transmission, emissions, analytical, vehicle and component testing. CADET was
developed with ease of use and flexibility in mind, compile and run engine and
vehicle test programs, automatically protect the test facility against out of
limit operation, record data during testing and analyze the data during or at
the completion of a test. CADET supports all dynamometer types both
steady state and transient and has control capability of up to 10 separate
dynamometers simultaneously. This is all coupled with up to 64
secondary controlled PID loops for subsystem control. CADET offers a comprehensive
library of third-party device interfaces and we generate custom interfaces as well.
Control of equipment is performed across interface technologies. For example,
mixing can channel information with a physical actuator output and responses.
Control and data logging is driven by a common interrupt signal for time aligned
averaged data capture rather than sequential snapshot data. Additionally,
all channels are optically isolated. This enables CADET to offer high
resolution and reduce the chance of monitoring noise levels. On initial startup, a test report form is
presented. This form is designed in the test editor and the user enters required
test information. The test report form supports up to two tabs, or pages, of data
entry. CADET supports single or multiple screen operation to optimize the operator
viewing experience. CADET multi-screen capability enables display tabs to be
shared on an additional monitor. Now, let’s take a look at the runtime
display screen. The screen is divided into five separate areas. From the top of the
screen these are menu options, main display area, fixed values, set point
control area and test status information. Each channel can be assigned to a logical
channel number. Channel names or descriptions are user configurable by the
operator. Channel units are configurable. Duplicate channels driven by the same data
can be configured to display in different units. For example, the same pressure
transducer signal can have one channeling Kilopascals and a second in millibars. Join the test to keep the test operated
completely aware of all test parameters at a glance. The colored strip above each
output shows high and low alarms and shutdown levels with a narrow tank
indicating current relative position. Another operator feedback point is the
test status and messages bar. This area shows the current test stage,
remaining test duration and messages and alarms. Here, you can see the primary
control set points. These are typically for dynamometer and throttle control. CADET
allows running in automated scheduled mode and in manual mode. The control modes
available are speed, torque and direct. Switch between auto and manual control
mode using the bumpless transfer feature. When returning to auto mode from manual, a
ramp time can be set. Secondary PID controls are commonly used
throughout the test cell for things like controlling coolant and oil temperatures,
exhaust back pressure and a host of other requirements. CADET V14 allows the user to
generate custom user displays in addition to the main display screen for instant
efficient viewing of data. Custom displays allow up to eight tabs of
custom range value bars, dials, gauges and digital buttons to be
configured. The test history tab shows a snapshot of
all channel values. This snapshot can be scheduled automatically from the test
schedule and additional manual logs can be implemented by clicking the log button or
pressing the F3 key. A record of all alarms, messages and
errors that occur is stored on the subtabs. The tracker tool is a runtime aid
and does not have an impact on test results. Tracker is a time-based graphical
tool for use during testing, three subtabs each with up to five
simultaneous channels can be displayed. Settings for time base, visibility of grid
lines, and a channel Y-axis range and offset can be configured. Tracker occupies one half of the display
screen and the other half displays value bars. To add new channels to the tracker
tool, simply select from the values page to the left then drag and drop the
relevant channel onto a spare channel or overwrite an existing channel. The values
and units of the channel will update automatically. CADET has external clock
driven real-time control of the whole system. The open software architecture
allows the user to create custom functions utilizing test data in a real-time manner.
CADET offers new layouts and additional features. Values bars now have integrated
alarm and shutdown level indication and current value telltales. Dials now have
drag and drop functionality with auto value and unit updates. The tracker now
has increased display channels and uses the drag and drop function. We hope this video has been informative
and that you have a better understanding of the possibilities of CADET to aid your
next engine and vehicle test program. ♪ [music] ♪