| A Framework for Developing SAE J1939 Devices The SAE J1939 standard defines the CAN based data communication between electronic control units (ECU) in heavy duty vehicles like trucks, construction or agricultural vehicles and machines. Although first published in 1998, the SAE J1939 standard became increasingly popular in the last years. Today the suppliers of ECUs for diesel engines, transmissions, brakes etc. are forced to convert their systems to J1939 based communication. This article describes aspects, requirements and alternatives for implementing J1939 into an ECU and presents solutions based on a commercially available protocol stack... |
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| A modular approach to a flexible CANopen service tool In recent years CANopen devices became increasingly advanced both in terms of the provided process I/O functionality and the implemented configuration mechanisms. Traditionally the device commissioning process was limited to the parameterization of the I/O and the communication functionality via the CANopen network, using either a stand-alone network configuration tool or a CANopen configuration manager integrated with the NMT (Network Management) master. Today local layer parameters like node-ID and bit rate may be set using Layer Setting Services (LSS) as specified in CiA 305, and firmware updates are handled using the program download mechanism as described in CiA 302. Both these additional device commissioning tasks are not commonly addressed by CANopen network configuration tools... |
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| Advantages of CAN topology components in building automation systems CAN was originally developed for use in vehicles, but is also extremely successful in the field of industrial automation due to very good network stability, flexibility in terms of intercommunication of the devices (producer/consumer principle) and the low costs. Further advantages of CAN are the possible line length of up to several kilometers, the good electromagnetic compatibility (EMC) and the availability of CAN interfaces on most industrial microcontrollers. In addition, there is a wide range of development and test tools as well as communication software... |
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| 3, 2, 1, checked About start-up and diagnostics of CAN systems In the last few years, CAN (Controller Area Network) has been increasingly used in various devices and systems. Although CAN is meanwhile more or less the standard for networking components in the industrial environment, the installation and start-up of CAN systems involves traps which must be recognized and avoided. Especially for installers, system integrators and service technicians, a tool is therefore required with which the error-free networking of CAN components can be tested and the basic function of the systems can be analyzed at the physical level. Important requirements for such an "installation tester" are simple operation and a clear, comprehensible display of the test results, based on which an error can be easily localized and eliminated even by inexperienced users... |
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| CANmodem, the Key for Worldwide Access to CANopen Systems The number of CAN-based automation systems is continuously increasing and a significant part of these systems rely on the CANopen standard. Today CANopen based systems can be found in vehicles, elevators, ships, production systems, assembly lines, wind turbines and many kind of embedded systems. All of these systems have to be configured, updated, maintained or continuously monitored and from time to time diagnosed... |
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| A Failure-Tolerant CANopen System for Marine Automation Systems CANopen-based communication also becomes popular for failuretolerant systems. A typical application of that type is the area of marine automation systems, e.g. ship alarm, monitoring and control systems in any kind of ships like product carriers, container ships, passenger vessels, ferries and cargo ships. The main rule to be met in that type of application is, that the system must tolerate at least one arbitrary single component failure. This implies that a general redundant system configuration, including the communication system, has to be provided to fulfill the requirements of a failure-tolerant system... |
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| Cafe au CANopen The new generation of high performance coffee machines by WMF for professional, public and congress use (Fig. 1) has nothing in common with the handy coffee-makers we use at home. It is a complex, but ordered mixture of boiler, valves, hoses, cables and grinders. Controlled by a pair of infineon 16bit microcontrollers, it takes no more than 20 seconds from the roasted coffee bean to a cup of creamy, steaming java... |
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| CANopen-based Distributed Intelligent Systems Since the deployment of the first CANopen devices and systems in 1995/1996, CANopen has become an established solution in more and more application areas as a communications standard for exchanging process-related data and parameters between controllers and peripherals. Approval of version 4.01 of the CANopen specification and submission of the standard at European level (prEN 50325-4) demonstrates that CANopen is now on equal footing with established competing field bus standards... |
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