12 Communications Performance
12 - 6
NX-series EtherCAT Coupler Unit User’s Manual (W519)
Tmax-OutTrans
This is the longest output transmission time of the EtherCAT Coupler Units in all of the EtherCAT
Slave Terminals in the same EtherCAT network.
The output data transmission time is the time that is required for the EtherCAT Coupler Unit to read
the output data from the EtherCAT communications path and send the data to the NX Units.
With synchronous I/O refreshing, the data transmission is completed before the Sync0 timing.
Use the following formula to find Tmax-OutTrans.
Use the following formula to find T#n-OutTrans.
Formula: Tmax-OutTrans = Max(T#1-OutTrans,
*1
T#2-OutTrans,
*2
...T#n-OutTrans
*3
*1. T#1-OutTrans is the output data transmission time of the EtherCAT Coupler Unit in the EtherCAT Slave
Terminal with node address 1.
*2. T#2-OutTrans is the output data transmission time of the EtherCAT Coupler Unit in the EtherCAT Slave
Terminal with node address 2.
*3. T#n-OutTrans is the output data transmission time of the EtherCAT Coupler Unit in the EtherCAT Slave
Terminal with node address n. “#n” indicates the node address of the EtherCAT Slave Terminal. “n” is the
address.
“Max” indicates the maximum value in the parentheses.
Formula: T#n-OutTrans = 11.71
×
(Integer quotient of total byte size
*1
of the NX Unit output data
÷
32)
*2
*1. This is the total byte size of the output data of the NX Units in the EtherCAT Slave Terminal.
*2. Round down the value that results from the calculation in parentheses to an integer. It is expressed as
follows with a Microsoft Excel function:
ROUNDDOWN(
Total_byte_size_of_all_NX_Unit_output_data
/32,0)
+ 0.46
×
(Remainder of quotient of total byte size*1 of the NX Unit output data
÷
32)
*3
+ (0.19
×
Number of NX Units with BOOL output data
*4
+ 2.93)
*5
+ 0.38
×
Number of NX Units
*6
+ 0.014
×
Total bytes size of NX Unit output data*1
+ 30.40
*3. This is the remainder. It is expressed as follows with a Microsoft Excel function:
MOD(
Total_byte_size_of_all_NX_Unit_output_data
/32,0)
*4. This is the number of NX Units for which there are I/O assignments to BOOL output data in the EtherCAT
Slave Terminal. For example, the NX-OD3121 meets this condition because it is an NX Unit that has
BOOL output data. However, the NX-OD4121 does not meet this condition because it is an NX Unit that
has BYTE output data.
*5. If there are no NX Units in the EtherCAT Slave Terminal that have I/O assignments to BOOL output data,
use 0 for the calculation in parentheses.
*6. This is the total number of NX Units in the EtherCAT Slave Terminal.
(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: ......