Data transmission method based on Ethernet (registered trademark), Ethernet (registered trademark) node, and control system

摘要

The invention provides an Ethernet-based data transmission method, which is applied to a control system with a plurality of nodes. The method comprises: a first node caches the data needed to be sent (S101); if the current communication macro-cycle comprises the time segment for the first node to send data, the first node sends the cached data in the time segment for the first node to send data within the current communication macro-cycle; if the current communication macro-cycle does not comprise the time segment for the first node to send data, the first node does not send the cached data in the current communication macro-cycle; wherein other nodes do not send data in the time segment for the first node to send data within the current communication macro-cycle, and the communication macro-cycles have same durations and each communication macro-cycle consists of a plurality of time segments with a fixed length (S102). The invention further provides Ethernet nodes and a control system.