Slave-node configuring method for e.g. Recommended standard-985-bus, involves determining synchronization period of master-nodes and inverting polarity of bus at slave-nodes when level at receiving line is unequal to reference level

摘要

The method involves providing a differential two-wire bus with a receiving line (RxD) and a transmitting line (TxD) with respect to the polarity of the bus. A synchronization period of master-nodes is determined, where user data are not transmitted in the master-nodes. Level at the receiving line is tested during synchronization period in relation to a reference level of the receiving line for the synchronization period. The polarity of the two-wire bus is inverted at slave-nodes (2), when the level at the receiving line is unequal to the reference level. An independent claim is also included for a bus-interface for slave-nodes at a differential two-wire bus.