Configuration
3.6.2 Specifying Port Number
Port number settings
• Port numbers are allocated in order for the various communication processes provided by
the TCP/IP or UDP/IP to be differentiated by the programmable controller or the computer.
• The restrictions that apply to available port numbers are different for TCP/IP and UDP/IP, as
indicated in the table below.
Setting status of port no. in open processing
Applicable
communication
protocol
TCP/IP UDP/IP
Multiple
connections
with a single
partner node
Multiple settings for both
source node port number
and partner node port
number
● ●
Single setting for source
node port number,
multiple settings for
partner node port number
Multiple settings for
source node port number,
single setting for partner
node port number
●
Neither source node port
number nor partner node
port number can be set to
single setting
Connections
with multiple
nodes
Multiple settings for
source node port number
● ●
Single setting for source
node port number
• We recommend setting the port number to a value of 8000 (1F40) or higher.
• The same port number can be specified for the source node and the partner node.
• The same port number can be specified for TCP and UDP.
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