发明授权
- 专利标题: Fault localization and health indication for a controller area network
- 专利标题(中): 控制器局域网的故障定位和健康指示
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申请号: US09461662申请日: 1999-12-14
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公开(公告)号: US06442708B1公开(公告)日: 2002-08-27
- 发明人: Peter P. Dierauer , Isabelle Dierauer
- 申请人: Peter P. Dierauer , Isabelle Dierauer
- 主分类号: H02H305
- IPC分类号: H02H305
摘要:
A node of a network comprises an error message detector arranged to detect error messages transmitted over the network, a counter arranged to count the error messages in order to produce an error message count, and a controller arranged to count valid messages in order to produce a count of valid messages. The controller is arranged to compare the error message count to the valid message count to indicate the health of the network. The node further comprises a transceiver, a controller coupled to the transceiver by a receive line and a transmit line, and error message first logic coupled to the receive and transmit lines. The error message first logic is arranged to detect a first error message from the receive line and a second error message from the transmit line, and to determine whether the node is closest to a fault by comparing timing between the first error message and the second error message.