Omron NX-ECC201 User Manual page 270

12 Communications Performance
 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 12-1-1 I/O
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.
Formula: T#n-Free_I/OCycle = T#n-InTrans + T#n-OutTrans + T#n-exsoft
Refer to T#n-InTrans on page 12-15 and to T#n-OutTrans 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.
Formula: T#n-exsoft = 60 + {0.3 × {T#n-InTrans + T#n-OutTrans
This is the number of NX Units in the EtherCAT Slave Terminal with node address #n.
*1.
 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.
Type of NX Units
Digital Input Units
Analog Input Units
Temperature Input Units
Incremental Encoder
Input Units
SSI Input Units
Pulse Output Units
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.
12 - 16
+ (0.75 × Number of NX Units
Tnx-InProc
0 [μs] ---
0 [μs] ---
Conversion time ---
73 [μs] The same value applies to external inputs.
55 [μs] ---
35 [μs] This is the value for external inputs.
*1
) + 54}} ÷ 0.7
Remarks
NX-series EtherCAT Coupler Unit User's Manual (W519)
(Unit: μs)
(Unit: μs)