237
APPENDICES
A
Appendix
9
Proc
essing
T
im
e
Appendix
9.
1 T
rans
mission
from
the
ext
e
rnal
dev
ice t
o
the
Et
hernet
adapt
er
module
Appendix 9
Processing Time
This section describes processing time from the start of SLMP communication to the end of it. The processing time
values given below are the values calculated under the assumption that the Read (command: 0401) and Write
(command: 1401) are used.
The calculation formulas are provided for the case where the Ethernet adapter module communicates with an external
device through a connection. The processing time may increase due to any of the following factors.
• Network load (line congestion)
• Window size of the external device connected to the Ethernet adapter module
• Number of connections concurrently used, and the system configuration
Appendix 9.1
Transmission from the external device to the
Ethernet adapter module
(1) Calculation formula
Tsf = Ke + (Kdt
Df) + ACK processing time of external device [ms]
• Tsf: The elapsed time between when the Ethernet adapter module receives request data from the external
device and when until the requested processing is completed
• Ke, Kdt: Constant
• Df: Number of words in request message (excluding the header) + Number of words in response message
(excluding the header)
(2) Processing timing
Processing timing of the Ethernet adapter module is shown below.
Item
Command Subcommand
Communication
data code
TCP
UDP
Type
Operation
Ke
Kdt
Ke
Kdt
Device
Read
0401
00
1,
00
0
Binary code
6
0.0028
6
0.0028
ASCII code
6
0.0045
6
0.0040
Write
1401
00
1,
00
0
Binary code
6
0.0030
6
0.0030
ASCII code
6
0.0051
6
0.0044
External device
Ethernet
adapter module
Tsf
1) Command message of SLMP
2) ACK (TCP/IP only)
3) Response message of SLMP
4) ACK (TCP/IP only)
1)
2)
3)
4)
Содержание NZ2GF-ETB
Страница 1: ...CC Link IE Field Network Ethernet Adapter Module User s Manual NZ2GF ETB ...
Страница 2: ......
Страница 49: ...47 CHAPTER 4 PROCEDURE BEFORE THE OPERATION 4 4 1 Start Up Procedure Memo ...
Страница 82: ...80 10 The following dialog box is displayed 11 Set the switch on the Ethernet adapter module to RUN Click ...
Страница 198: ...196 a Detail Setting ...
Страница 246: ...244 Memo ...
Страница 253: ......