1 EtherCAT – General information
1.2 Protocol properties
10
XN-312-GW-EC gateway
07/20 MN050010-EN Eaton.com
A pure EtherCAT system is created when direct communications are estab-
lished without a switch.
Figure 1:
EtherCAT master and nodes
a
Controller with EtherCAT master
b
EtherCAT segment
c
EtherCAT node 1
d
EtherCAT node 2
e
EtherCAT node 3
f
EtherCAT node 4
g
EtherCAT node 5
h
If the RJ45 X2 port (EtherCAT OUT) on the last EtherCAT node is not connected to anything, the node
will internally connect the incoming Rx signal to Tx and send it back to the EtherCAT master this way.
1.2 Protocol properties
The EtherCAT protocol, which is optimized for process data, is encapsulated
within a standard Ethernet frame with the use of a specific EtherType
(0x88A4). Other Ethernet protocols are tunneled fully transparently when
using EtherCAT.
Figure 2:
EtherCAT: Standard Ethernet frame as defined in IEEE 802.3
An EtherCAT frame contains one or more datagrams and can be made up of
multiple subframes so as to transmit large amounts of data.
①
②
③
④
⑤
⑥
⑦
⑧
TX
RX
RX
TX
TX
RX
RX
TX
TX
RX
RX
TX
RX
TX
TX
RX
RX
TX
TX
RX
RX
TX
Содержание XN-312-GW-EC
Страница 1: ...Manual EtherCAT gateway XN 312 GW EC 07 20 MN050010 EN...
Страница 4: ...II...
Страница 12: ...0 About this manual 0 5 Writing conventions 8 XN 312 GW EC gateway 07 20 MN050010 EN Eaton com...
Страница 68: ...10 XN300 Assist 10 1 Firmware update with XN300 Assist 64 XN 312 GW EC gateway 07 20 MN050010 EN Eaton com...
Страница 95: ...12 Sample project 12 7 What will be transferred XN 312 GW EC gateway 07 20 MN050010 EN Eaton com 91...
Страница 102: ...12 Sample project 12 8 Finding XN300 slice module PDOs and SDOs 98 XN 312 GW EC gateway 07 20 MN050010 EN Eaton com...
Страница 130: ...126 XN 312 GW EC gateway 07 20 MN050010 EN Eaton com...