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Guide To SAE J1939 - Address Claiming Procedure Overview
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. While other higher layer protocols based on the CAN Bus do not support dynamic node address assignments per default, the SAE J1939 standard provides yet another ingeniously designed feature to uniquely identify ECUs and their primary function.Note: The CAN standard in itself does not support node (ECU) addresses, only [...]
Guide To SAE J1939 - Parameter Group Numbers (PGN)
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. SAE J1939 is a very ingeniously designed protocol that takes a resourceful advantage of the CAN 29-Bit message identifier. Rather than relying on a myriad of protocol functions, SAE J1939 uses predefined parameter tables, which keeps the actual protocol on a comprehensible level. However, these parameter tables [...]
Isolated CAN Transceiver With 70-V Bus Fault Protection and Flexible Data Rate (CAN FD)
Texas Instruments (TI) has introduced two more CAN Bus transceivers. They offer ±70-VDC bus-fault protection and ±30-V common-mode voltage range. The ISO1042 and ISO1042-Q1 help engineers protecting low-voltage circuits and increase communication bandwidth in industrial applications such as grid infrastructure, motor drives and building automation, as well as hybrid electric vehicles and electric vehicles (HEVs/EVs). Used in conjunction [...]
Guide To SAE J1939 - J1939 Message Format
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. The main document describing the J1939 message format is SAE J1939/21 – Data Link Layer. J1939/21 defines the use of the CAN data frame (29-bit identifier, Parameter Group Numbers – PGN, etc.) and the transport protocol functions, i.e. a definition of how messages longer than the standard [...]
Guide To SAE J1939 - Communication Methods
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. SAE J1939 provides three communication methods, each serving a specific purpose.1. Destination Specific Communications:Destination specific communications use PDU1 (PF values 0 to 239), but also the global destination address 255. There are cases where this method will require the utilization of destination specific Parameter Group Numbers, for instance, [...]
SAE J2534-1 And J2534-2 Device Supports CAN FD Plus Four CAN Bus Channels
Drew Technologies (USA) improved their J2534 devices by adding a CAN FD port. The Cardaq-Plus3 complies with the SAE J2534-1 and J2534-2 application programming interface specifications. It comes with one CAN FD and four standard CAN Bus interfaces. Additionally, it supports DoIP (Diagnostics over IP), which goes beyond the three-port requirement for some Chrysler/FCA models.Also, the product features High-Speed USB [...]
CAN Bus Transceiver Modules With Isolated DC/DC Converter In One Module
Mornsun CAN Bus transceiver modules replace the traditional design by integrating transceiver, isolation chip, and high efficient DC/DC isolated power in one module. The modules can be used for inter-communications between devices on the industrial bus, achieving the signal transmission and power isolation. They target the automotive industry, rail transportation, smart monitoring, smart meters, and more.Mornsun [...]
Complete Reference Guide To Automotive Electrics And Electronics
The new edition of this comprehensive reference for automotive engineers, compiled by one of the world's largest automotive equipment suppliers, includes new and updated material. As in previous editions, different topics appear in a compact, but descriptive way backed up by diagrams, graphs, photographs, and tables allowing the reader to understand the subject better. This fifth edition [...]
SAE J1708 to UART Breakout Board - Programming SAE J1708 Network Access
We at Copperhill Technologies have designed an SAE J1708-to-UART breakout board, and we are in the process of adding it to our e-commerce website. However, what we learned during the development is that the device is in need of some massive software support as I will explain in the following.First of all, to go into [...]
Guide To SAE J1939 - J1939 Characteristics
The following is an excerpt from A Comprehensible Guide To J1939 by Wilfried Voss. SAE J1939 is a higher-layer protocol based on Controller Area Network (CAN). It provides serial data communications between microprocessor systems (also called Electronic Control Units - ECU) in any kind of heavy-duty vehicles.Everything that has to do with CAN is based on maximum reliability with the [...]