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12 - 3
12 Communications Performance
NX-series EtherCAT Coupler Unit User’s Manual (W519)
12-1
P
e
rform
ance o
f Proces
s Dat
a Com
m
u
n
icat
ion
s
12
12-
1-1
I/O R
espon
se T
ime
s for
Synchr
onous I/O R
efreshing
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 task
Primary 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
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
Summary of Contents for NX-ECC201
Page 38: ...Sections in this Manual 36 NX series EtherCAT Coupler Unit User s Manual W519...
Page 46: ...1 EtherCAT Networks 1 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 56: ...2 Features and System Configuration 2 10 NX series EtherCAT Coupler Unit User s Manual W519...
Page 82: ...4 Part Names and Functions 4 14 NX series EtherCAT Coupler Unit User s Manual W519...
Page 100: ...5 Designing the Power Supply System 5 18 NX series EtherCAT Coupler Unit User s Manual W519...
Page 214: ...9 Setting Up Slave Terminals 9 44 NX series EtherCAT Coupler Unit User s Manual W519...
Page 254: ...11 EtherCAT Coupler Unit Functions 11 30 NX series EtherCAT Coupler Unit User s Manual W519...
Page 278: ...12 Communications Performance 12 24 NX series EtherCAT Coupler Unit User s Manual W519...
Page 340: ...14 Maintenance and Inspection 14 8 NX series EtherCAT Coupler Unit User s Manual W519...
Page 400: ...Appendices A 60 NX series EtherCAT Coupler Unit User s Manual W519...
Page 401: ...Index 1 NX series EtherCAT Coupler Unit User s Manual W519 I Index...
Page 405: ......