Daimler Chrysler Ag

Daimler-benz Ag

Juergen Minuth

Max Reeb

Juergen Setzer

Peter Hanf

Thilo Kuehner

Bernhard Rall

Peter Lohrmann

Bernd Haeussler

Juergen Dorner

Volker Seefried

Helmar Kuder

Franz Josef Petry

Bernd Saeufferer

Sebastion Grimmeisen

Martin Huber

Guenther Schwarz

Werner Preuschoff

Wolfgang Appel

A method for testing and safeguarding the availability of a networked system which is assigned to a system carrier, wherein a multiplicity of subscribers exchange data via a bus-type network which is comprised of one or more bus lines. Specific voltage levels are applied to the bus line or the lines by the appropriate subscribers. By virtue of this, as a minimum, at least individual subscribers transmit data. The bus line or the lines is/are monitored by the at least one receiving subscriber for an overshoot or undershoot of voltage levels. Due to this, the data is evaluated in at least one receiving subscriber with the aid of voltage levels. During operation of the system, signals present on the bus-type network are discriminated, tested or measured with respect to at least one signal criterion by individual subscribers under conditions defined in a network-wide manner for all subscribers. In each case, characteristic status data is generated for each signal criterion (with respect to each subscriber) and collected and arranged in at least one status map of the system. This status data characterizes both the current and at least one earlier status, with regard to the tested subscribers and with respect to the at least one criterion. At least one measure of the margin of error of the networked system with respect to the at least one criterion is obtained from the status data.

Process for testing and ensuring the availability of a networked system

An electronic vehicle controller has a processor unit and a communication output stage for coupling the controller to a databus. A data protocol device, which is connected between the processor unit and the communication output stage, variably defines the data protocol to be used for a particular data transfer, as a function of protocol control information which is supplied to its input side. The data protocol device may be in the form of hardware or software, and allows flexible data protocol selection even at the end of the controller development process.

Electronic vehicle controller with a databus capability

A semiconductor circuit for an electronic unit having at least one microcontroller comprises at least one voltage regulator for providing, from a first supply voltage, at least one second supply voltage for the microcontroller and for circuits of the unit which cooperate with the microcontroller. The circuit further comprises, in monolithic form, a transceiver unit having transmitting and receiving device for coupling a microcontroller to the two-wire bus. This monolithic construction may additionally comprise watchdog functions, various wake-up functions and an interface via which a serial data exchange with the at least one microcontroller is possible. Furthermore, it may have an apparatus for determining, throughout the network, bus subscribers having reference-ground potential faults and for quantifying such faults.

Semiconductor circuit for an electronic unit

Process for determining potential shifts between eletronic modules in a wire bus network

In a method for testing the ground contact of parts of a networked system in which data are sent and received via at least one line, at least one line at each part is connected via a resistance arrangement to a common potential of the parts and is connectable via a controllable switch to a further potential. The voltage across the resistance arrangement is compared with a predetermined potential when the line is at one potential in a steady state, and the state of the ground contact of the part is deduced from a comparison of the voltage across the resistance arrangement with the predetermined potential.

Process for testing the ground contact of parts of a networked system

Data communication system

Growing community of inventors

Eislingen, Germany

Juergen Minuth