Patent ID: 7197667
Filing Date: 2007-03-27
Classification: H04L

Abstract:
1. A method for testing an error-free function of modules ( 2 . 1 . . . 2 .n) in a bus system with a central unit ( 1 ) for exchanging data by means of a data protocol frame, a) whereby an allocated position (D 2 .x) within the data protocol frame is prescribed for each module ( 2 .x), b) at least one data request (D 1 ) is agreed-upon, in response to which at least one of the modules ( 2 .x) in the error-free condition in the normal operation transmits data to the central unit ( 1 ) and/or the other modules ( 2 . 1 . . . 2 .n), c) characterized by providing a command for silence in response to which the modules ( 2 . 1 . . . 2 .n) in the error-free condition switch into a silent operating mode and transmit no data in response to the agreed data request (D 1 ), d) initially setting all modules ( 2 . 1 . . . 2 .n) into the silent operating mode, e) subsequently transmitting the agreed data request (D 1 ), and f) in connection therewith testing whether one of the modules ( 2 . 1 . . . 2 .n) transmits data in response to the agreed data request (D 1 ) despite the silent operating mode.