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1 EtherCAT Networks
NX-series EtherCAT Coupler Unit User’s Manual (W519)
1
-1 In
trod
uct
ion
to Et
herCA
T
1
1
-1-1
How Ether
CA
T W
orks
The data exchanges that are cyclically performed between the EtherCAT master and EtherCAT slaves
use EtherCAT telegrams that are stored directly in the Ethernet frames.
Each EtherCAT telegram consists of a telegram header (including the data length and one or more
slave addresses), data, and a working counter (i.e., check bits).
If you think of an Ethernet frame as a train, the EtherCAT telegrams would be the cars of the train.
Ethernet
header
CRC
Ethernet data (1,498 bytes max.)
Data
Telegram
header
WKC
1st to nth EtherCAT telegrams
EtherCAT
header
1st EtherCAT
telegram
2nd EtherCAT
telegram
nth EtherCAT
telegram
. . . . .
EtherCAT frame
Ethernet frame
WKC: Working counter
Summary of Contents for NX-ECC201
Page 38: ...Sections in this Manual 36 NX series EtherCAT Coupler Unit User s Manual W519...
Page 46: ...1 EtherCAT Networks 1 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 56: ...2 Features and System Configuration 2 10 NX series EtherCAT Coupler Unit User s Manual W519...
Page 82: ...4 Part Names and Functions 4 14 NX series EtherCAT Coupler Unit User s Manual W519...
Page 100: ...5 Designing the Power Supply System 5 18 NX series EtherCAT Coupler Unit User s Manual W519...
Page 214: ...9 Setting Up Slave Terminals 9 44 NX series EtherCAT Coupler Unit User s Manual W519...
Page 254: ...11 EtherCAT Coupler Unit Functions 11 30 NX series EtherCAT Coupler Unit User s Manual W519...
Page 278: ...12 Communications Performance 12 24 NX series EtherCAT Coupler Unit User s Manual W519...
Page 340: ...14 Maintenance and Inspection 14 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 400: ...Appendices A 60 NX series EtherCAT Coupler Unit User s Manual W519...
Page 401: ...Index 1 NX series EtherCAT Coupler Unit User s Manual W519 I Index...
Page 405: ......