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12 Communications Performance
12 - 10
NX-series EtherCAT Coupler Unit User’s Manual (W519)
Unit Configuration and Data Sizes in the EtherCAT Slave Terminal
The unit configuration and data sizes in the EtherCAT Slave Terminal are given in the following
table.
Calculating the Elements of the I/O Response Times
This section shows how to calculate the elements of the I/O response times.
(a)
Calculating Edelay
The following parameters are required to calculate the value.
Refer to
Unit Configuration and Data Sizes in the EtherCAT Slave Terminal
for the values of the above parameters.
Therefore, the value of Edelay is as follows:
Unit type
Model num-
ber
Number
of Units
Byte size of
input data
Byte size
of output
data
No. of NX
Units with
BOOL input
data
No. of NX
Units with
BOOL output
data
EtherCAT Cou-
pler Unit
NX-ECC201
1
34
0
---
---
Digital Input Units
NX-ID3343
8
4
*1
*1. The input data size of one NX-ID3343 is 0.5 bytes.Therefore, the byte size of the input data is
8 Units
×
0.5 bytes, or 4 bytes.
0
8
---
Digital Output
Units
NX-OD3153
8
0
4
*2
*2. The output data size of one NX-OD3153 is 0.5 bytes. Therefore, the byte size of the input data
is 8 Units
×
0.5 bytes, or 4 bytes.
---
8
Analog Input Units NX-AD4608
1
16
0
0
*3
*3. This Unit has INT data, so there are 0 Units.
---
Analog Output
Units
NX-DA3605
1
0
8
---
0
*4
*4. This Unit has INT data, so there are 0 Units.
Total for EtherCAT Slave Terminal
19
54
12
---
---
Total for NX Units
18
20
12
8
8
Parameter
Value
Remarks
Number of EtherCAT
slaves
1
An EtherCAT Slave Terminal is counted as one
EtherCAT slave.
EtherCAT frame length
in bytes
64 bytes
The EtherCAT Slave Terminal has a total input
data size of 54 bytes and a total output data size
of 12 bytes. Both the input data size and output
data size are less than 64 bytes, so 64 bytes is
used.
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)
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: ......