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

US6405330B1 · kind B1 · utility

Assignee

• Daimlerchrysler AG · US

Inventors

• Peter Hanf · Göppingen, DE
• Juergen Minuth · Markdorf, DE
• Juergen Setzer · Mühlacker, DE
• Max Reeb · Uhingen, DE

Key dates

• Filing date: Feb 26, 1999
• Grant date: Jun 11, 2002
• Expiry date: Feb 26, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2012/40215
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A method and apparatus for determining potential shifts between electronic modules in a wire bus network or for determining the correspondence quality of their communications operating levels in the network interconnection. The bus medium comprises at least one wire bus which is directly electrically connected to the electronic modules. An offset voltage is added in at least one bus subscriber (test subscriber) on the transmission side to at least one of two dominant, normal source levels and a test message is transmitted into the bus network by the test subscriber which is in this dominant state onto the bus network. This results in a modification of the source level in a predetermined manner. Depending on whether at least one of the two dominant source levels is decreased or increased by the adjustable offset voltage, an evaluation of whether the (reference-earth) potential-defective bus subscriber loses or gains its reception capability is performed.For implementation of the method, an apparatus comprising co-operative potential control devices which are connected or can be connected to the transceiver function of a bus subscriber is used. Together with these, at least with rega…