Mitsubishi Electric NZ2GF-ETB, User Manual

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99
CHAPTER 7 COMMUNICATION OF THE ETHERNET ADAPTER MODULE
7
7.
2
Com
m
unicat
ion Us
in
g t
he O
n-dem
and
F
unc
tion
7.2.6
On-demand data format
This section explains about on-demand data sent from the Ethernet adapter module to an external device.
(1) On-demand data
The following illustration shows the on-demand format.
(a) Subheader
Subheaders vary depending on whether a serial No. is added or not added to a request message.
• Set whether a serial No. is added in the frame setting format of control data.
• Set the serial No. of control data. (

Page 95, Section 7.2.5 (5))
For applications and precautions of serial Nos., refer to the following:

SLMP Reference Manual
(b) Network No. and station No.
The third octet of the external device IP address is stored in the network No.
The fourth octet of the external device IP address is stored in the station No.
When 255.255.255.255 (broadcast communications) is selected for the IP address of the destination, the third
and fourth octets are as follows:
• The third octet: The third octet of the IP address of the Ethernet adapter module (Ethernet part)
• The fourth octet: 255 (FF
H
)
When adding a serial No. When not adding a serial No.
Request
destination
module I/O
number
Header Subheader
Station
number
Network
number
For
future
extension
Request data
length
Monitoring
timer
Command Subcommand Send data
5 4 0 0
35
H
34
H
30
H
31
H
32
H
33
H
30
H
1 2 3 4
34
H
0 0 0 0
30
H
30
H
30
H
30
H
54
H
00
H
34
H
12
H
00
H
00
H
ASCII code
(Fixed value)
(Fixed value) (Fixed value)
(Fixed value)
Serial number
Binary code
Serial
number
5 0 0 0
35
H
30
H
30
H
30
H
50
H
00
H
ASCII code
(Fixed value)
(Fixed value)
Binary code
3 1
192
168
Station number
Network number