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10 I/O Refreshing
NX-series EtherCAT Coupler Unit User’s Manual (W519)
10-1 Introduction to I/O Refresh-
ing for EtherCAT Slave Termi-
10
I/O refreshing is performed between the EtherCAT master and EtherCAT slaves and between the
EtherCAT Coupler Unit and the NX Units. The ranges of refreshing are given in the following table.
The operation of refreshing between the built-in EtherCAT port on the NJ-series CPU Unit and the NX
Units on the EtherCAT Slave Terminal is determined by the combination of the I/O refresh types for the
above ranges.
The rest of this section gives a general description of I/O refreshing between the built-in EtherCAT port
on the NJ-series CPU Unit and EtherCAT slaves. This is followed by a description of I/O refreshing with
the NX Units on EtherCAT Slave Terminals.
Range
I/O refreshing type
Synchronized Not synchronized
Refreshing between the EtherCAT
master and EtherCAT slaves
*1
*1. In this context, the EtherCAT Coupler Unit is an EtherCAT slave.
DC Mode Free-Run Mode
Refreshing between EtherCAT Cou-
pler Unit and NX Units
Synchronous I/O refreshing Free-Run refreshing
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