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PLC Connections
28
Echochange - Manual / PLC Connections
If default port 2222 is used, you only need to parameterize the connection on the
echo device side. On the PLC side, no other settings are required.
5.6 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.
Read (Fetch active) and Write (Write active):
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 parameterized on both sides of the communication
(one connection in the echo 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
echo device side. On the PLC side, no other settings are required. Please make
sure that the echo 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 echo device side).
5.7 Send/Receive – General Information
In a Send / Receive communication, the data is transmitted without application headers, i.e. as raw
data.
Any station that supports the Send / Receive direct interface can be used as the communication
partner.
The Send / Receive protocol works both with TCP/IP and H1.
Receiving and sending data
It is generally possible to both send and receive over a single connection.
Besides the address of the Send / Receive PLC (IP address or MAC address), you need to
specify a port or TSAP..
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