Omron NX-ECC201 User Manual

10 - 5
10 I/O Refreshing
NX-series EtherCAT Coupler Unit User’s Manual (W519)
10-2 I/O Refreshing for Ether-
CAT Slaves
10
10-2-2 I/O Refreshing Mode Operation
Free-run slave #1 in the figure labeled Example of I/O Refreshing Mode Operation on page 10-5 oper-
ates in Free-Run Mode.
This slave performs I/O processing based on its own unique timing ((C) and (D) in the figure), indepen-
dent of Sync0.
An example of operation in each I/O refreshing mode is provided in the following figure.
Free-Run Mode Operation
Example of I/O Refreshing Mode Operation
Primary periodic task Primary periodic task Primary periodic task
Sync0
Sync0
(D)
(C)
Input delay and
AD conversion time
Output delay and
DA conversion time
Sync0
(B)
EtherCAT
Master Function
Module
PLC
Function
Module
EtherCAT
communications
path
Synced
slave #1
Free-run
slave #1
Synced
slave #2
Primary period
(example: 500 μs)
Primary period
(example: 500 μs)
Primary period
(example: 500 μs)
Process data communications
cycle (example: 500
μ
s)
Process data communica-
tions cycle (example: 500
μ
s)
Process data communica-
tions cycle (example: 500
μ
s)
Period of Sync0
(example: 500 μs)
Period of Sync0
(example: 500 μs)
Period of Sync0
(example: 500 μs)
EtherCAT transmission
time
EtherCAT transmission
time
EtherCAT transmission
time
Processing for free-run slave #1 Processing for free-run slave #1
( A )
CPU Unit
EtherCAT slaves

Omron NX-ECC201 Specifications

General

Brand	Omron
Model	NX-ECC201
Category	Controller
Language	English