SATO FX3-LX Operator's Manual page 242

[Network]
[Ports] (USB+LAN Model Only)
Set the TCP/IP port number.
Roles of Port1 to Port3
In the socket server function of TCP/IP, either of the following connection methods can be used.
The ports to be used and their roles change depending on the connection method and communication
protocol.
Two-port connection
Port1 is used for receiving print data, and Port2 is used for returning the printer status.
Two-port connection is available when the communication protocol is Status4.
One-port connection
One port is used for both receiving print data and returning the printer status.
When the communication protocol is Status4, Port3 is used.
When the communication protocol is Status3 or Status5, Port1 or Port3 is used.
The setting items are as follows:
[Port1] (USB+LAN Model Only)
Set the port number of Port1.
For the two-port connection of Status4, this port is used for receiving print data. For the one-port
connection of Status3/Status5, this port is used for both receiving print data and returning the printer
status.
The setting range is from 1 to 65535.
• Each port (1, 2 and 3) must be set to different values.
242