Patent ID: 7940803
Filing Date: 2011-05-10
Classification: H04L

Abstract:
1. A method for data transmission, comprising the following steps: providing a data network having at least two participants and at least one topological real-time field and one topological non-real-time field, wherein said data network is at least in part a repeating data network, and wherein said at least two participants comprise at least one primary master participant and at least one secondary slave participant; producing data telegrams containing at least one real-time part and at least one non-real-time part; sending said data telegrams containing said at least one real-time part and at least one non-real-time part via the data network; providing a coupling unit; routing the data telegrams by the coupling unit from the at least one non-real time field into an Internet Protocol channel in the at least one real-time field, wherein the coupling unit is passive with respect to real-time communication; processing by said coupling unit of only the Internet Protocol channel; delaying the data telegrams from the non-real-time field that arrive within the real-time part and transmitting said data telegrams from the non-real-time field arriving within the real-time part to the non-real-time part via said coupling unit, wherein said data network is comprised by a real-time communication system for automation purposes comprising input/output interfaces; providing a data field in the real time part configured for multiplex data transmission; transmitting said data in a multiplexed fashion when no new participant is added; and providing at least two codes in the data field relating to data transmission times that are evaluated by the coupling unit, wherein said at least two codes are indicative of an earliest and latest receipt time of data in the non-real-time part only when no new participant is to be added.