Mitsubishi MELSEC L Series, User Manual

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CHAPTER 6 SOCKET COMMUNICATION FUNCTION
6
6.
1
C
o
mm
uni
cat
ion Using T
C
P
(3) Program example for Passive open
The following shows a communication flow of a Passive open.
(a) Parameter setting
The following parameters are set for the sample program.
Project window
[Parameter] [PLC Parameter] [Built-in Ethernet Port Setting]
[Open Setting]
*1 When "Fullpassive" is selected for "TCP Connection", a value must be set.
Item Setting
Protocol TCP
Open System Socket Communication
TCP Connection Unpassive
Host Station Port No. 1000
H
(Setting range: 0001
H
to 1387
H
, 1392
H
to FFFE
H
)
Destination IP Address
Blank
*1
(Setting range: 0.0.0.1 to 223.255.255.254)
Destination Port No.
Blank
*1
(Setting range: 0001
H
to FFFE
H
)
Send or receive?
Send by the SP.SOCSND
instruction, or receive by
the SP.SOCRCV or
S.SOCRCVS instruction.
NO
Waiting for TCP connection in
Passive open state.
YES
Start