Omron W343-E1-07 - Manual (Page 250)

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Command/Response Reference Section 11-3
Remote Port Number
(Command, Results
Storage Area) Specify the remote TCP port number with this command. If all zeroes are set,
no remote TCP port number is specified. If any other value is set, it specifies
the TCP port number of the remote node. The TCP port number of the con-
nected remote node will be stored in the results storage area.
Precautions
Processing varies as shown in the table below according to the specified com-
bination of remote IP address and remote TCP port number.
Remote IP address Remote TCP port Description
0 0 All connection requests received
0 Not 0 Received only when port number
matches.
Not 0 0 Received only when IP address
matches.
Not 0 Not 0 Received only when IP address and
port number matches.