Omron CS CJ1W-ETN21 User Manual
Page 174
150
Using Socket Services with CMND(490)
Section 6-8
Program Memory Maps
The send and receive data and bits (flags) used by the program are shown in
the following diagrams.
DM Area
000AH 0004H 0001H 0110H 0000H 0032H
0
1
2
3
4
5
6
7
8
9
D00000
Number bytes to receive: 4 bytes
Remote Ethernet Unit designation
Network address: 01
hex
Node address: 01
hex
Unit address: 10
hex
FINS communications port: Port #0
Response monitor time: 5 s
CMND(490) control data for UDP OPEN REQUEST
Number of UDP OPEN REQUEST command data bytes: 10 bytes (000Ahex)
0008H 0004H 0001H 0110H 0000H 0032H
0
1
2
3
4
5
6
7
8
9
D00010
CMND(490) control data for UDP CLOSE REQUEST
Number of bytes to receive: 4 bytes
Number of UDP CLOSE REQUEST command data bytes: 8 bytes
Number bytes to receive: 4 bytes
0074H 0004H 0001H 0110H 0000H 0032H
0
1
2
3
4
5
6
7
8
9
D00020
CMND(490) control data for UDP SEND REQUEST
Command format = 16 bytes + 100 bytes send data
Number of UDP SEND REQUEST command data bytes: 116 (0074hex) bytes
Number bytes to receive: 4 bytes
000CH 0004H 0001H 0110H 0000H 0032H
0
1
2
3
4
5
6
7
8
9
D00030
CMND(490) control data for UDP RECEIVE REQUEST
Number of bytes received is specified in command data.
Number of UDP RECEIVE REQUEST command data bytes:
12 bytes (000C
hex
)
2701H 0001H 8203H FC00H 1000H
0
1
2
3
4
5
6
7
8
9
D01000
UDP OPEN REQUEST command data
Command code
UDP socket number (Ethernet Unit socket number): set to 1
Results storage area: set to D01020 (03FC
hex
)
Local port number: set to 4096 (1000
hex
)