DEWETRON Data Acquisition Solutions - Dewetron America

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PORTABLE MINITAUR | DEWE-101 6 Yes, we CAN (BUS) ! One of the most important data buses today is the CAN bus. Originally developed by Bosch for use in automobiles, today the C AN bus is found in cars, motorcycles, trucks, boats, military vehicles, many aircraft engines, farming and construction vehicles, NAsCAR race cars, even commercial refrigerators and too many other machines to mention. CAN (controller area network) is very robust two-wire interface and is therefore used also as the interface for many different sensors, especially in the automotive industry, such as gyro platforms, speed sensors, torque wheel systems, pressure and flow transducers, and others. Two high-speed CAN interfaces are built into each DEWE-101 The DEWE-101 has TWO high speed synchronous CAN interfaces built right in, so you can easily connect vehicle busses as well as sensors which output on the CAN bus. Dewesoft can decode any kind of data from the CAN bus in read only or acknowledge mode. It supports importing of standard DBC libraries for easy setup. CAN bus can be very extensive - a modern car has hundreds or even thousands of CAN channels on the bus, but it is very easy to work with those in Dewesoft. Can You Really “Over Sync” ? Unlike other systems, <strong>Dewetron</strong> CAN data is 100% synchronized with the analog data. Normally the analog inputs are sampled faster than the CAN bus, which is 1 Mbps maximum. However there are applications where the analog channels are sampled slower than CAN, and even here we “over sync” the data to preserve the CAN data time axis resolution regardless of the analog sample rate! Over-sync is standard in DEWEsoft starting in version 7.0 Expansion via CAN CAN interface(s) in all kinds of vehicles, engines, aircraft, and machinery CAN 1 CAN 0 daisy-chain CAN sensors and signal conditioners, such as the CPAD2 modules shown here Above - without “over-sync”, CAN data is limited to the analog sample rate. The result is loss of CAN data between analog samples. Above - with “over-sync”, CAN data is stored with full time axis resolution regardless of the analog sample rate. www.dewamerica.com/DEWE-101
Get On Board with OBD II The OBD II (On Board Diagnostic II) is standardized vehicle interface which must be implemented in each vehicle sold in the UsA; and California law requires a standard interface for measuring vehicle exhaust. Parameters like vehicle speed, engine RPM, throttle position and temperatures can be read out of any vehicle which has the OBD II interface. The 101 simply requires a cable to connect the OBD II port to one of our CAN interfaces. J1939 Truck and Bus protocol J1939 is a standardized truck interface working on the CAN bus. Virtually all trucks comply with this standard. simply check the J1939 on-screen box for either of the DEWE-101’s CAN ports. Note - the older J1587 is also supported!. DBC File Import support You can set up your CAN parameters very easily within DEWEsoft - create the arbitration IDs that you need, and then define the messages within each ID. Or, if you have a DBC file which contains a list of IDs and messages in a standardized format, you can directly open it from within DEWEsoft! There is also a sCAN checkbox that will “listen” to the bus and create IDs for all channels which are sending messages. But you need to know the message parameters like scaling, bit range, name, etc., because these are not broadcast via the CAN interface. Setting up your CAN channels can be done manually - or via SCAN, or via DBC file import. In the screen shot above you can see the SETUP dialog for Arb ID I2D is open, and that this ID contains three messages - Satellites, Time, and Latitude. Messages are color coded for your convenience. Each one can be scaled and configured freely. DEWE-101 PORTABLE MINITAUR / DEWE-101 sERIEs 7
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DEWETRON Data Acquisition Solutions - Dewetron America

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