Method for transmitting messages between bus users
First Claim
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1. A method of transmitting messages between a plurality of bus users, each of which is connected with a communication bus for exchanging messages, the method comprising the acts of:
- conducting a message transmission from a first bus user to a second bus user in a normal operation mode; and
for diagnosing the message transmission, operating in a diagnostic operating mode that differs from the normal operation mode and includes the acts of;
requesting, by a diagnostic device uninvolved in the message transmission during the normal operation mode, the second bus user to output on the communication bus the message transmission;
detecting a disturbance when the diagnostic device does not receive the message transmission or receives a damaged message transmission from the second bus user via the communication bus; and
determining, by the diagnostic device, whether a source of the disturbance is in the first bus user or in the second bus user.
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Abstract
A method is provided for transmitting messages between bus users that are each linked with a communication bus for the purpose of exchanging messages and with a diagnostic device for detecting the failure of the communication bus. In a diagnostic operation mode that is different from the normal operation mode, the bus user receiving the message is requested by the diagnostic device to output the message to the communication bus, thereby diagnosing a message transmission between two bus users.
30 Citations
10 Claims
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1. A method of transmitting messages between a plurality of bus users, each of which is connected with a communication bus for exchanging messages, the method comprising the acts of:
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conducting a message transmission from a first bus user to a second bus user in a normal operation mode; and for diagnosing the message transmission, operating in a diagnostic operating mode that differs from the normal operation mode and includes the acts of; requesting, by a diagnostic device uninvolved in the message transmission during the normal operation mode, the second bus user to output on the communication bus the message transmission; detecting a disturbance when the diagnostic device does not receive the message transmission or receives a damaged message transmission from the second bus user via the communication bus; and determining, by the diagnostic device, whether a source of the disturbance is in the first bus user or in the second bus user. - View Dependent Claims (2, 3, 4, 5, 6, 10)
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7. A diagnostic method for messages transmitted between first and second bus users, in which said bus users are each linked with a communication bus for purposes of exchanging messages and with a diagnostic device for detecting a failure of a message transmission, the method comprising:
in a diagnostic operation mode that is different from a normal operation mode, requesting, by the diagnostic device, the second bus user to output to the communication bus a message transmission from the first bus user to the second bus user during the normal operation mode, thereby diagnosing the message transmission, wherein the diagnostic device is uninvolved in the message transmission during the normal operation mode. - View Dependent Claims (8, 9)
Specification