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MELSEC-F
COMMUNICATION PROCEDURE5
5 - 23
(9) Destination Port No.
(connection numbers 1 to 8; BFM#43, 50, 57, 64, 71, 78, 85, 92)
(a) Set the port numbers of the external devices for each connection.
(b) The port numbers of the external devices are set in the range from 1025 to
65534.
(c) Set the port numbers for the external device upon consulting a network
administrator.
(d) The following table provides some precautions that should be observed
when setting port numbers.
( in the diagram indicates a device and indicates a port number.)
Status of connection establishment
( : Port (indicates port number))
Description of connection
Communication
protocol
TCP UDP
When connecting to multiple external devices, set
multiple port numbers for the local station.
When connecting to multiple external devices, set
a single port number for the local station.
(However, it is necessary to open a connection for
each external device)
This cannot be chosen when the local station is
Unpassive.
When connecting to multiple ports of an external
device, set multiple port numbers for the Ethernet
module.
When connecting to multiple ports of an external
device, set a single port number for the Ethernet
module. (However, it is necessary to open a
connection for each external device port)
This cannot be chosen when the local station is
Unpassive.
When connecting to the same port of an external
device, set multiple port numbers for the Ethernet
module. (However, it is necessary to open a
connection for each Ethernet module port)
Setting multiple ports numbers for the same port
of an external device and the Ethernet module is
possible only when pairing open is set.
Important
Make sure to set parameters for connections that communicate by Passive open
or UDP open when [Always wait for OPEN (communication possible at STOP
time)] is selected in the Operation settings (see Section 4.6).
Ethernet module
External device
External device
Ethernet module
External device
External device
Ethernet module
External device
Ethernet module
External device
Ethernet module
External device
Ethernet module
External device