Canopen over ethercat (coe) – Lenze 931K User Manual

Page 30

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CANopen over EtherCAT (CoE)

EtherCAT state machine
Differences in the state machine under CANopen and EtherCAT

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KHB 13.0005−EN 1.0

8.3.1

Differences in the state machine under CANopen and EtherCAT

When the 931K is operated via the EtherCAT CoE protocol, instead of the CANopen state
machine the EtherCAT state machine is used. In some points it differs from the CANopen
state machine. The differences between the response of the CANopen and EtherCAT state
machines are specified in the following:

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No direct transition from Pre−operational to Power−on

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No "Stopped" state, but a direct transition to the "Init" state

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Additional state: Safe−operational

CANopen State

EtherCAT State

Power−on

Power−on (initialisation)

Init

Stopped

Safe−operational

Operational

Operational

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