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EtherCAT Information
TR-Electronic GmbH 2016, All Rights Reserved
Printed in the Federal Republic of Germany
Page 24 of 153
TR-EMO-BA-GB-0022 v03
09/29/2020
4.4.1 CANopen over EtherCAT (CoE)
EtherCAT can provide the same communication mechanisms as those known from
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CANopen:
Object dictionary
PDO, Process Data Objects
SDO, Service Data Objects
NMT, Network Management
EtherCAT can thus be implemented on devices that were previously equipped with
CANopen, with minimal expense. Extensive parts of the CANopen firmware can be re-
used. The objects can be optionally extended.
Comparison of CANopen / EtherCAT in the ISO/OSI layer model
Figure 5: CANopen organized in the ISO/OSI layer model
Figure 6: EtherCAT organized in the ISO/OSI layer model
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EN 50325-4: Industrial Communication Systems, based on ISO 11898 (CAN) for Controller Device Interfaces.
Part 4: CANopen.