Omron NX-ECC201 User Manual

12 - 3
12 Communications Performance
NX-series EtherCAT Coupler Unit User’s Manual (W519)
12-1 Performance of Process Data Communications
12
12-1-1 I/O Response Times for Synchronous I/O Refreshing
A timing chart for the I/O response time with synchronous I/O refreshing is provided in the following fig-
ure. This timing chart shows the maximum I/O response time.
Timing Chart and Configuration Elements of the I/O Response Time
Primary periodic taskPrimary periodic task
IO UPG MC
IO UPG MC
Primary periodic task
IO UPG MC
Primary periodic task
IO UPG MC
Primary period
Tcycle
Process data
communications
cycle
I/O response time
All EtherCAT
Slave Terminals
EtherCAT Slave
Terminal #1
EtherCAT
Coupler Unit
NX Unit (inputs)
NX Unit (outputs)
EtherCAT Slave
Terminal #2
EtherCAT
Coupler Unit
NX Unit (inputs)
NX Unit (outputs)
Signal from
output terminal
EtherCAT transmission time
(Sync0)
(Sync0) (Sync0) (Sync0)
NX Unit input
synchroniza-
tion timing
Tmax-OutTrans
Tmax-InTrans
T#1-OutTrans
T#1-InTrans
Tmax-InProc
Tnx-InProc
Time lag = Tcycle
Tcycle + Edelay + Etxj
Tnx-Indelay
T#2-InTrans
T#2-OutTrans
Tmax-OutProc
Tnx-Outdelay
Tnx-OutProc
CPU Unit
Primary period
Tcycle
Primary period
Tcycle
Primary period
Tcycle
PLC Function
Module
EtherCAT
Master
Function
Module
EtherCAT communi-
cations path
Signal to input
terminal
Process data
communications
cycle
Process data
communications
cycle
Process data
communications
cycle
EtherCAT transmission time
EtherCAT transmission time
EtherCAT transmission time
NX Unit input
synchroniza-
tion timing
NX Unit input
synchroniza-
tion timing

Omron NX-ECC201 Specifications

General

Brand	Omron
Model	NX-ECC201
Category	Controller
Language	English