| 摘要 |
A bus system comprises a data bus ( 10 ), a central unit ( 20 ) and a number of input ( 30 A-B) and output ( 40 A-D) nodes. The system is arranged such that nodes ( 30 A-B, 40 A-D) changing their states, automatically report this to the central unit ( 20 ). The central unit ( 20 ) is put into a particular node association mode. When being in this mode, the central unit ( 20 ) detects two consecutive messages (M 10 , M 11 ) of state changes at connected nodes ( 30 A-B, 40 A-D), and creates an association between the nodes ( 30 A, 40 D) as a response. The association is thereby possible to create by deliberately changing the state of the nodes that is wanted to be associated. The central unit ( 20 ) may be brought back to normal operation mode either automatically, or by an action by the operator. In this way, one or several input nodes ( 30 A-B) can be associated with one or several output nodes ( 40 A-D).
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