Setting Procedure; Communications Using An Auto-Open Udp Port; Open/Close Timing - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Setting procedure

Set "External Device Configuration" under "Basic Settings". ( Page 244 External Device Configuration)
1.
Select "SLMP Connection Module" in "Module List" and drag it to "List of devices" or "Device map area".
2.
Set the other items to the connection if required.

Communications using an auto-open UDP port

The auto-open UDP port is used for communication with SLMP.
The auto-open UDP port is a UDP/IP port that automatically opens and closes at the following timing. When this port is used,
communication is enabled when the initial processing is completed. Communication can be performed without a program
regardless of the connection's open status.

■Open/close timing

After the Ethernet-equipped module initial processing completes, the port automatically opens according to the registered
parameter settings. The port automatically closes when the power for the Ethernet-equipped module station turns off or is
reset.
• When the initial processing ends normally, the Ethernet-equipped module enables communications using
an automatic open UDP port. The module waits for a communication request to the Ethernet-equipped
module on the own station. (Automatic open)
• The Ethernet-equipped module accepts and processes requests from anywhere as long as they are
addressed to the Ethernet-equipped module itself.
• If a communication request is received from an external device, the corresponding port number is occupied
until that processing ends. Even if another communication request is accepted during this time, the
communication processing will be waited.
1 FUNCTIONS
1.2 SLMP Communications
1
29