Chapter 7 EtherCAT Communication
CN3 (RJ45): EtherCAT Signal IN
CN4 (RJ45): EtherCAT Signal OUT
SDO request, SDO response
Profile Position Mode
Profile Velocity Mode
Profile Torque Mode
Homing Mode
Cyclic Synchronous Position Mode
Cyclic Synchronous Velocity Mode
Cyclic Synchronous Torque Mode
DC mode, DC periodā„ 250us
7.2.2 EtherCAT Network reference model
Multiple kinds of application protocols are available for EtherCAT communication.The IEC 61800-7 (CiA
402)-CANopen motion control profile is used for M5-N series servo drives.
The following figure shows the EtherCAT communication structure at CANopen application layer.
The EtherCAT (CoE) network reference model consists of two parts: the data link layer and the application layer.
The data link layer is responsible for EtherCAT communication protocol, and the application layer is embedded
with the CANopen drive Profile (CiA402) communication protocol. The application layer object dictionary in the
CoE contains communication parameters, application data, and PDO mapping information.