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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
Multiple
connections
with a single
partner node
Connections
with multiple
nodes
KEY POINTS
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.
3-12
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
Multiple settings for
source node port number
Single setting for source
node port number
Applicable
communication
protocol
TCP/IP
UDP/IP
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