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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
Observe the following precautions when you make the calculations.
• Include the NX Units that are set to
Disable
in the NX Unit Mounting Setting.
• Even if you disabled a channel when you select the channels to use for an Analog I/O Unit, use the
data size for when all channels are enabled to calculate the elements.
• Use bytes as the unit for NX Units that have a data byte size of less than one byte.
For example, the byte size is as follows for an NX Unit with a data size of 4 bits.
4 (bits)
÷
8 (bits/byte) = 0.5 (bytes)
• Use the data sizes that you will actually use in the data size calculations.
Refer to this manual, the user’s manuals for individual NX Units, or to the
NX-series Data Reference
Manual
(Cat. No. W525) for the default values of the Unit data sizes.
This section provides a calculation example for I/O response times.
Calculation Conditions
Calculations are made for the following conditions.
(a)
Configuration
The following configuration is used.
(b)
With the above configuration, the I/O response time is calculated as the time from when the
CPU Unit processes an external input signal to the NX-ID3343 until the signal is output
from the NX-OD3153.
(c)
It is assumed that Tcycle is set to 500
μ
s.
(d)
The default I/O allocations settings are used for the EtherCAT Slave Terminal.
(e)
The input filter time for the NX-ID3343 is set to
No filter.
(f)
The power supply design conditions are not considered in this calculation example.
Calculation Precautions
Calculation Example
NJ-series
CPU Unit
Built-in EtherCAT port
EtherCAT Slave Terminal #1
NX-
ECC201:
1 Unit
NX-
ID3343:
8 Units
NX-
OD3153:
8 Units
NX-
AD4608:
1 Unit
NX-
DA3605:
1 Unit
End Cover
NX Units
EtherCAT Coupler Unit
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: ......