Serial Port Configuration
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Model 2285 Getting Started Guide
4 • Serial port configuration
UDP mode
The UDP mode operation is similar to that of TCP mode except that it is based on UDP protocol and only
one pre-defined remote host is able to communicate with the Model 2285. Users do not have to configure
cyclic connection, since UDP is a connectionless protocol.
Figure 25. Host mode configuration (UDP mode)
1) Operations
If a remote host sends a UDP datagram to the one of UDP Local port of the Model 2285, Model 2285 first
checks whether it is from one of the hosts configured on remote host configuration. If the remote host is one of
the hosts configured on remote host configuration, then Model 2285 transfers the data through the serial port.
Otherwise, the Model 2285 discards the incoming UDP datagram. But user can force Model 2285 accept all
incoming UDP datagram regardless remote host configuration by setting Accept UDP datagram from unlisted
remote host parameter as Yes. If there is any incoming data from the serial port, the Model 2285 transfers the
data to the remote host defined on remote host configuration. If the remote port is not opened, the Model 2285
will not transfer the data.
2) Parameters
UDP receiving port
The concept is the same as TCP listening port.
Max. allowed connection
The concept is the same as that of TCP communication.
Accept UDP datagram from unlisted remote host
If Accept unlisted (Accept UDP datagram from unlisted remote host) function is set as No, Model 2285 will
accept only incoming UDP datagram from the remote host(s) configured on remote host configuration. On
