12 Communications Performance
12 - 18
NX-series EtherCAT Coupler Unit User’s Manual (W519)
If a formula rather than a value is given for Tnx-Outdelay in the above table, refer to the user’s man-
uals for individual NX Units or to the
NX-series Data Reference Manual
(Cat. No. W525) for the val-
ues of the items to make the calculation.
12-1-1 I/O Response Times for Synchronous I/O
on page 12-2 for the formula for calculation precautions.
This section provides a calculation example for I/O response times.
Calculation Conditions
The conditions are the same as those for calculating the I/O response time for synchronous I/O
refreshing. Refer to
on page 12-9 in
12-1-1 I/O Response Times for Syn-
on page 12-2 for details.
Unit Configuration and Data Sizes in the EtherCAT Slave Terminal
These are the same as those for calculating the I/O response time for synchronous I/O refreshing.
Refer to
on page 12-9 in
12-1-1 I/O Response Times for Synchronous I/O
on page 12-2 and
Unit Configuration and Data Sizes in the EtherCAT Slave Terminal
12-1-1 I/O Response Times for Synchronous I/O Refreshing
for details.
Calculating the Elements of the I/O Response Times
This section shows how to calculate the elements of the I/O response times.
Because the calculation conditions are the same as for calculating the I/O response time for syn-
chronous I/O refreshing, a description of the required parameters is omitted here and only the calcu-
lation results are given. Refer to
12-1-1 I/O Response Times for Synchronous I/O Refresh-
on page 12-2 for a description of the parameters required for the calculation.
(a)
Calculating Edelay
The value of Edelay is as follows:
(b)
Calculating Etxj
The value of Etxj is fixed. The value is given below.
Calculation Precautions
Calculation Example
Formula: Edelay
= 1.24
×
Number of EtherCAT slaves
+ 0.09
×
EtherCAT frame length in bytes
= 1.24
×
1 Unit + 0.09
×
64 bytes
= 7
(Unit:
μ
s)
Formula: Etxj = 100
(Unit:
μ
s)
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: ......