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3 Basic Usage Procedures
E3NW-ECT EtherCAT Digital Sensor Communication Unit Operation Manual (E429)
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3-3
Starting Communications
Start the system, allocate I/O data of Slave Units, and then start the EtherCAT communications.
For operational state and details of it, refer to "5-3 Communications State Transitions" on page 5-4.
Turn ON the power supply to the Units in order.
(1) Unit power supply of Slave Units (When the power is supplied, Slave Unit's [PWR] indicator is lit.)
•
If you are using Distributed Sensor Units, turn ON the power supply to the Distributed Sensor Units
as well.
(2) Unit power supply of EtherCAT Master Units
The following communications are performed in EtherCAT.
PDO communications (remote I/O communications)
Allocate I/O data of Slave Units to the EtherCAT Master Unit (PDO mapping) and perform PDO
communication (remote I/O communications).
For the detailed explanation of I/O data of each Slave Unit, refer to "I/O Data Allocation (PDO
Mapping)” in Chapter 7.
Note that the ESI file are used to allocate I/O data.
For the detailed explanation of the procedure, refer to the manual of the EtherCAT Master Unit to be
used and the manual of the Configuration Tool.
The maximum assignable PDO size for the E3NW-ECT is 350 bytes. (Refer to "7-2-3 Mode Setting
Functions for PDO Communications" on page 7-6 for details.) Do not assign PDOs that exceed the
maximum assignable PDO size.
SDO communications (message communications)
For the method of using, refer to the manual of the EtherCAT Master Unit to be used.
Refer to "Appendix A - 1 Object Dictionary" for the detailed explanation of objects implemented on
E3NW-ECT EtherCAT Sensor Communication Units.
Note that the SDO communications can be used in the pre-operational state or more.
Shift to the operational state (EtherCAT communications possible) to start the EtherCAT
communications.
For how to shift to the operational state, refer to the manual of the EtherCAT Master Unit to be used.
3-3-1
Starting a System
3-3-2
Setting EtherCAT Communications
3-3-3
Starting EtherCAT Communications
Summary of Contents for E3NW-ECT
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