1 FUNCTIONS
1.4 Socket Communications
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1.4 Socket Communications
Using dedicated instructions, arbitrary data can be exchanged with an external device connected by Ethernet over TCP/IP or
UDP/IP.
Use this for bidirectional communication one-on-one with an external device.
For examples of socket communications, refer to the following.
MELSEC iQ-R Ethernet/CC-Link IE User's Manual (Startup)
Precautions
Socket communications cannot be used when the RJ71EN71 network type is set to "Q Compatible Ethernet".
Setting procedure
Set "External Device Configuration" under "Basic Settings". ( Page 244 External Device Configuration)
1. Select the external device to be connected in "Module List" and drag it to "List of devices" or "Device map area".
2. Set "Communication Method" for the external device to "Socket Communication".
3. Set the other parameters required for communication in the connection.
External device name Description
UDP Connection Module Select to communicate with the external device using UDP/IP
Active Connection Module Select to perform the open processing to the external device from the Ethernet-equipped module (Active open)
and communicate using TCP/IP.
Unpassive Connection Module Select to receive the open processing from an unspecified external device (Unpassive open) and communicate
using TCP/IP.
Fullpassive Connection Module Select to receive the open processing from the specified external device (Fullpassive open) and communicate
using TCP/IP.
Ethernet-equipped module
External device
External device
External device
Ethernet
Receive or
broadcast receive
Send
Broadcast send
Broadcast send
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