MELSEC-Q – General Information

The MELSEC-Q protocol is used for the communication with Mitsubishi PLCs from the MELSEC-Q series.

The MELSEC-Q protocol only works in conjunction with TCP/IP.

When communicating with MELSEC-Q PLCs, it is generally possible to both read and write data over a single connection.

The connection needs to be configured on both sides of the communication (one connection in the device and one connection in the MELSEC-Q PLC).

By default, port 8192 is used. The same port number must be used on both sides of the connection.

If the MELSEC-Q PLC uses non-parameterizable connections with fixed ports (“default connections”), you only need to parameterize the connection on the device side. On the PLC side, no other settings are required. Please make sure that the device uses the same ports as the MELSEC-Q PLC.

NOTE:

In Mitsubishi PLCs, addresses are often given in HEX notation (in this case, you need to convert the port numbers to decimal notation for the device side).

NOTE:

For communication with Mitsubishi PLCs, a specific Melsec-Q Item Syntax is used.

The apply as well Melsec-Q Protocol settings.