Method and device for checking the error-free function of modules in a bus system comprising a central unit

US7197667B2 · kind B2 · utility

Assignees

• Conti Temic microelectronic GmbH · DE
• Robert Bosch GmbH · DE
• Siemens Aktiengesellschaft · DE

Inventors

• Hans Bogenrieder · Ingolstadt, DE
• Holger Wulff · Ingolstadt, DE
• Heiko Buehring · Oldenburg, DE
• Ewald Mauritz · Rutesheim, DE
• Klaus-Dieter Meier · Leonberg, DE
• Bernd Pfaffeneder · Regensburg, DE

Key dates

• Filing date: Nov 13, 2002
• Grant date: Mar 27, 2007
• Expiry date: Nov 27, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2012/40267
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

The error-free function of modules in a bus system with a central unit is tested. First, all (error-free) modules are set into a silent operating mode in response to an agreed silence-command, and then in this silent operating mode it is tested whether all modules still remain silent, i.e. do not transmit data, in response to an agreed data request allocated to these modules. A module that nonetheless transmits data is recognized as faulty and is deactivated. Subsequently, all modules except for a module to be tested are set into the silent operating mode, and then it is tested whether this test module transmits its data in response to the agreed data requests allocated to it and remains silent in response to the data requests not allocated to it. Additionally, the position of the return-transmitted data can be determined and compared with a nominal position.