Communication Structure - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Communication structure

With socket communications, port numbers that identify the communication are used to enable multiple communication
sessions with the external device. These are used for both TCP/IP and UDP/IP.
For send: Specify send source Ethernet-equipped module's port number and the send destination external device's port
number.
For receive: Specify the Ethernet-equipped module's port number, and read the data sent to that port.
Ethernet-equipped module
(IP address: xx.xx.xx.xx)
(1) Sending UDP data from Ethernet-equipped module's port number A to external device 1's port number L.
(2) Sending UDP data from external device 1's port number L to Ethernet-equipped module's port number A
(3) Sending data with TCP/IP connection
(4) Sending UDP data from Ethernet-equipped module's port number C to external device 3's port number N
(5) Sending UDP data from external device 3's port number N to Ethernet-equipped module's port number C
Ethernet
(1)
Port No.A (2)
(3)
(3)
Port No.B
(4)
Port No.C
(5)
External device 1
(IP address: yy.yy.yy.yy)
Port No.L
External device 2
(IP address: zz.zz.zz.zz)
Port No.M
External device 3
(IP address: ww.ww.ww.ww)
Port No.N
1.4 Socket Communications
1
1 FUNCTIONS
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