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8 EtherCAT Communications
NX-series EtherCAT Coupler Unit User’s Manual (W519)
8
-4 Proces
s Dat
a Ob
ject
s (PDOs)
8
8-4
-1 Intr
oduction
8-4
Process Data Objects (PDOs)
Process data objects (PDOs) are used to transfer data during cyclic communications in realtime.
There are two types of process data objects (PDOs): the RxPDOs, which are used by the EtherCAT
Slave Terminal to receive data from the EtherCAT master; and the TxPDOs, which are used by the
EtherCAT Slave Terminal to send data to the EtherCAT master.
The EtherCAT application layer can hold more than one object to enable the transfer of various process
data of the EtherCAT Slave Terminal.
The contents of the process data is defined in the PDO mapping objects.
EtherCAT Slave Terminals support PDO mapping for I/O control.
8-4-1
Introduction
TxPDO
EtherCAT master
EtherCAT
Slave
Terminal
RxPDO
Output data and motion
commands to NX Units
(Output Units)
Status of EtherCAT Slave
Terminals and input data
from NX Units (Input Units)
Example: Built-in
EtherCAT
port on
NJ-series
CPU Unit
Содержание NX-ECC201
Страница 38: ...Sections in this Manual 36 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 46: ...1 EtherCAT Networks 1 8 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 56: ...2 Features and System Configuration 2 10 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 68: ...3 Specifications and Application Procedures 3 12 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 82: ...4 Part Names and Functions 4 14 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 100: ...5 Designing the Power Supply System 5 18 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 214: ...9 Setting Up Slave Terminals 9 44 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 254: ...11 EtherCAT Coupler Unit Functions 11 30 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 278: ...12 Communications Performance 12 24 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 340: ...14 Maintenance and Inspection 14 8 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 400: ...Appendices A 60 NX series EtherCAT Coupler Unit User s Manual W519...
Страница 401: ...Index 1 NX series EtherCAT Coupler Unit User s Manual W519 I Index...
Страница 405: ......