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12 Communications Performance
12 - 16
NX-series EtherCAT Coupler Unit User’s Manual (W519)
T#n-OutTrans
This is the output data transmission time of the EtherCAT Coupler Unit in the EtherCAT Slave Termi-
nal with node address n. The output data transmission time is the time that is required for the Ether-
CAT Coupler Unit to read the output data from the EtherCAT communications path and send the
data to the NX Units.
Refer to
Definitions of Formula Elements and Calculation Methods
on page 12-4 in
Response Times for Synchronous I/O Refreshing
on page 12-2 for the formula for T#n-OutTrans.
Use the formula for T#n-OutTrans in the description of Tmax-OutTrans in the referenced section.
T#n-Free_I/OCycle
This is the refresh cycle of the NX bus in the EtherCAT Slave Terminal with node address #n in
Free-Run Mode. Use the following formula.
Refer to
on page 12-15 and to
on page 12-16 for the definitions of and
calculation methods for T#n-InTrans and T#n-OutTrans. Here, the calculation method for T#n-exsoft
is described.
T#n-exsoft is the internal processing time in the EtherCAT Coupler Unit in the EtherCAT Slave Ter-
minal with node address n in Free-Run Mode.
Use the following formula to find T#n-exsoft.
Tnx-InProc
This is the input data processing time of the NX Unit. It is the time from reading the status of the NX
Unit input terminals into memory until preparations to pass the read data to the EtherCAT Coupler
Unit are completed. There is a unique value for each type of NX Unit.
The NX Unit input data processing time has a different definition or value for each type of NX Unit.
The following table gives the value or definition of Tnx-InProc for each type of NX Unit.
If a formula rather than a value is given for Tnx-InProc in the above table, refer to the user’s manuals
for individual NX Units or to the
NX-series Data Reference Manual
(Cat. No. W525) for the values of
the items to make the calculation.
Formula: T#n-Free_I/OCycle = T#n-I T#n-Ou T#n-exsoft
(Unit:
μ
s)
Formula: T#n-exsoft = 60 + {0.3
×
{T#n-I T#n-OutTrans
+ (0.75
×
Number of NX Units
*1
) + 54}}
÷
0.7
*1.
This is the number of NX Units in the EtherCAT Slave Terminal with node address #n.
(Unit:
μ
s)
Type of NX Units
Tnx-InProc
Remarks
Digital Input Units
0 [
μ
s]
---
Analog Input Units
0 [
μ
s]
---
Temperature Input Units
Conversion time
---
Incremental Encoder
Input Units
73 [
μ
s]
The same value applies to external inputs.
SSI Input Units
55 [
μ
s]
---
Pulse Output Units
35 [
μ
s]
This is the value for external inputs.
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: ......