Pairing Open; Applications - Mitsubishi Electric MELSEC-L SERIES Basic User Manual

12.7

Pairing Open

Pairing open is an opening method that connects the own station with the connected device using only one port by
pairing the receive and send connections for communications using a fixed buffer.
12.7.1

Applications

Enabling the pairing open allows data communications to be performed with two connections by performing the open
process for one port. MC protocol communications and communications using a random access buffer can be also
performed using paring-opened connections.
Connection No.1 Fixed buffer (to receive data)
Connection No.2 Fixed buffer (to send data)
● Connected devices where communications can be performed using the pairing open method are those in Ethernet where
an E71 is connected and those connected using the router relay function.
● The open/close processes in the receive connection where the pairing open has been enabled automatically perform the
open/close processes in the next connection (send connection).
E71
CHAPTER 12 COMMUNICATIONS USING A FIXED BUFFER
(TCP/IP or UDP/IP communications)
Send data
Port
Receive data
Connected device
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