October 2018
Intermediate to advanced
962 pages
40h 41m
English
Content preview from Industrial Communication Systems
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43-6 Industrial Communication Systems
43.5.1 Principles of Operation
In order to allow deterministic real-time communication to coexist with competing senders com-
municating in a best-eort manner, TTEthernet distinguishes between two fundamentally dierent
categories of trac: standard event-triggered (ET) Ethernet trac and time-triggered (TT) Ethernet
trac. In the case of TTEthernet trac, the senders are cooperating according to a consistent mes-
sage schedule in a way that no conicts will occur between TTEthernet messages in a fault-free
TTEthernet system. TTEthernet trac provides dependable hard real-time communication traf-
c which coexists with standard Ethernet trac but is guaranteed not to be disrupted by st
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