Supported Hardware and Software

MELSEC OI Server requires Wonderware Operations Integration – Core G-1.2 or later.

This OI Server enables Ethernet and serial communication with Q, QnA, and L Series PLCs from Mitsubishi Electric, using the MELSEC protocol.

To program these PLCs, you need to use the GX Developer or GX Works2 programming software from Mitsubishi Electric.

Device configuration

Keep in mind that in order to communicate with a PLC over UDP/IP, you need to use the programming software to configure the Ethernet settings on the PLC itself. For a Q Series PLC in GX Works2, it will be as below:

Protocol: UDP

Open System:

Fixed Buffer: Receive

Procedure: Procedure Exist

Pairing Open: Disable

Existence Confirmation: No Confirm

Host Station Port No: 1388

Destination IP Address: 255.255.255.255

Destination Port No.: FFFF

In this configuration, you will be able to communicate over UDP using port 5000 (0x1388).

Note: It is necessary to configure the Destination IP Address when communicating over UDP/IP. You can configure it as 255.255.255.255, and it will communicate with any PLC that tries to communicate with it.

For an L Series PLC in GX Developer, you need a similar configuration:

With the configuration above, you will be able to communicate over UDP/IP using port 4998 (0x1386) and over TCP/IP using port 4999 (0x1387).

Conformance

The following hardware and software was used for conformance testing of this OI Server.

Configuration:Q Series PLC (Ethernet)

• Device: Q00JCPU with QJ71E71-100 module

• Cable: Ethernet

• UDP Port: 5001

• TCP Port: 5002

Configuration: Q Series PLC (Serial)

• Device: Q00JCPU with QJ71C24 module

• Cable: Null Modem Cable with Gender Adapter

• Serial Port: CH1 (RS232)

• Comm Settings: 9600, 8, 1, Odd

Configuration: L Series PLC (Ethernet)

• Device: L26CPU-BT with Ethernet port embedded on the CPU

• Cable: Ethernet

• UDP Port: 4998

• TCP Port: 4999