12 Communications Performance
12 - 12
NX-series EtherCAT Coupler Unit User’s Manual (W519)
(d) Calculating Tmax-OutTrans
There is only one EtherCAT Slave Terminal, so the value is as follows:
Tmax-OutTrans = T#1-OutTrans
The following parameters are required to calculate T#1-OutTrans.
Refer to Unit Configuration and Data Sizes in the EtherCAT Slave Terminal on page 12-10
for the values of the above parameters.
Therefore, the value of Tmax-OutTrans is as follows:
(e) Calculating Tmax-InProc
Tnx-InProc for an NX-ID3343 Digital Input Unit and an NX-AD4608 Analog Input Unit is 0
s.
Therefore, the value of Tmax-InProc is as follows:
(f) Calculating Tmax-OutProc
Tnx-OutProc of an NX-OD3153 Digital Output Unit is 0 μs.
Tnx-OutProc of an NX-DA3605 Analog Output Unit is defined as the conversion time times
the number of points. The conversion time is 10 μs per point and there are 4 points.
Therefore, the value of Tmax-OutProc is as follows:
Parameter Value Remarks
Total byte size of the out-
put data of the NX Unit
12 bytes This is the total output data size of the NX Unit.
Number of NX Units 18 Units ---
Number of NX Units with
BOOL output data
8 Units ---
Formula: Tmax-OutTrans = T#1-OutTrans
= 11.71
×
(Integer quotient of total byte size of the output data of the NX Unit
÷
32)
+ 0.46
×
(Remainder of total byte size of the output data of the NX Unit
÷
32)
+ (0.19 × Number of NX Units with BOOL output data + 2.93)
+ 0.38 × Number of NX Units
+ 0.014 × Total bytes size of NX Unit output data
+ 30.40
= 11.71
×
(Integer quotient of 12 bytes
÷
32) + 0.46
×
(Remainder of 12 bytes
÷
32)
+ (0.19
×
8 Units + 2.93) + 0.38
×
18 Units + 0.014
×
12 bytes + 30.40
= 11.71 × 0.00 + 0.46 × 12.00 + (0.19 × 8 Units + 2.93)
+ 0.38 × 18 Units + 0.014 × 12 bytes + 30.40
= 47.38
(Unit: μs)
Formula: Tmax-InProc = 0.00
(Unit: μs)
Formula: Tmax-OutProc = Conversion time × Number of points = 10 × 4 points = 40.00
(Unit: μs)
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