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5 EtherCAT Communications
5 - 4
E3NW-ECT EtherCAT Digital Sensor Communication Unit Operation Manual (E429)
5-3
Communications State Transitions
The EtherCAT State Machine (ESM) indicates the state transition model of EtherCAT Slave Unit
communications control. It is controlled by EtherCAT Master Unit.
The following figure shows the communications state transitions from power ON.
E3NW-ECT can’t trance the state of Operational, when amplifier does not exist.
State
SDO
communi
cations
PDO
transmiss
ion
PDO
reception
Contents
Initialization (Init)
Not
possible.
Not
possible.
Not
possible.
Communications are being initialized.
Communications are not possible.
Pre-Operational
(Pre-Op)
Possible
Not
possible.
Not
possible.
SDO (message) communications are
possible in this state.
This state is entered after initialization has
been completed. It is used to initialize
network settings.
Safe-Operational
(Safe-Op)
Possible
Possible
Not
possible.
In this state, PDO transmissions are possible
in addition to SDO (message)
communications.
PDO sendings can be used to send
information such as status from the Slave
Unit.
Operational (Op)
Possible
Possible
Possible
Normal communication state
PDO communications can be used to control
the I/O data.
Initialization
Pre-Operational
Safe-Operational
Operational
Power ON
Содержание E3NC
Страница 3: ...E3NW ECT EtherCAT Digital Sensor Communication Unit Operation Manual Revised March 2020...
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Страница 26: ...1 EtherCAT Network 1 8 E3NW ECT EtherCAT Digital Sensor Communication Unit Operation Manual E429...
Страница 46: ...4 Installation and Wiring 4 10 E3NW ECT EtherCAT Digital Sensor Communication Unit Operation Manual E429...
Страница 62: ...5 EtherCAT Communications 5 16 E3NW ECT EtherCAT Digital Sensor Communication Unit Operation Manual E429...
Страница 84: ...7 Function Specifications 7 14 E3NW ECT EtherCAT Digital Sensor Communication Unit Operation Manual E429...
Страница 104: ...8 Troubleshooting and Maintenance 8 20 E3NW ECT EtherCAT Digital Sensor Communication Unit Operation Manual E429...
Страница 168: ...A Appendices A 64 E3NW ECT EtherCAT Digital Sensor Communication Unit Operation Manual E429...
Страница 172: ...Revision 2 E3NW ECT EtherCAT Digital Sensor Communication Unit Operation Manual E429...
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