Mitsumi electronic NZ2GF-ETB Manuel D’Utilisation

230

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

Tsf = Ke + (Kdt × Df) + ACK processing time of external device [ms]

 • Constant (Ke, Kdt)

Processing timing of the Ethernet adapter module is shown below.

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)

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)