Method and apparatus for digital data transmission

摘要

An expansion of known serial data links, for example ETHERNET, published in IEEE802.3, for directly transmitting random events without having to carry out synchronization with a clock signal or having to wait for a cyclical transmission time. Two different, random events are represented using two differently coded individual pulses and are transmitted in an event-controlled manner. A jitter-free latency of 45 ns between the event and its reception is possible over a line length of 8 m, for example. The expansion is particularly suitable for the short, digital data links between a node and a plurality of modules, as are required in modern electrical discharge machines, machine tools and similar electronic systems.

主权项

1. A method for digital data transmission of stochastic events in a machine tool, comprising the steps of:
providing a data cable comprising a plurality of twisted conductor pairs; configuring at least one of the plurality of twisted conductor pairs for serial data transfer; configuring at least another of the plurality of twisted conductor pairs for transmitting stochastic events; signalling stochastic events by a first individual pulse transmitted by the another twisted conductor pair without a clock; and providing as a first individual pulse one of a positive and negative pulse for signalling a first stochastic event and the other of the positive and negative pulse for signalling a second stochastic event, wherein the absence of an individual pulse signalling no event.