Broadcast Communications - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Broadcast communications

Broadcast communications is a communication method that does not specify the external device. Data is exchanged between
all Ethernet-equipped module stations and external devices on the same Ethernet to which the Ethernet-equipped modules
are connected.
Item
Broadcast sending
Broadcast receiving
Setting procedure
Set "External Device Configuration" under "Basic Settings". ( Page 244 External Device Configuration)
1.
Select "UDP Connection Module" in "Module List" and drag it to "List of devices" or "Device map area".
2.
Set "Communication Method" for the external device to "Broadcast Send" or "Broadcast Receive".
3.
Set the other parameters required for communication in the connection.
Precautions
• Decide the dedicated port number for broadcast communication in the system, and use that number.
• Access via a router is not permitted when using broadcast send.
• The external device connected on the same Ethernet must carry out a read/discard processing if the message received
with broadcast receiving is not required.
• When the CPU module receives the data with broadcast receiving, the IP address of the sending external device and the
external device's port number can be retried with the SP.SOCCINF instruction.
1 FUNCTIONS
66
1.4 Socket Communications
Description
The same data is sent to all Ethernet devices on the same Ethernet.
The data sent with broadcast send is received.