Atop Technology SE5002D User manual - Manual (Page 47)

Atop Serial Device Server
SE5002D
User Manual V. 1.1
3.4.3 UDP
SE5002D also supports connectionless UDP protocol in contrast to the connection-oriented
TCP protocol. Please be aware that even though UDP provides better efficiency in terms of
response time and resource usage, it does not guarantee data delivery. It is recommended to
utilize UDP only with cyclic polling protocols where each request is repeated and independent,
such as Modbus Protocol. The following figure shows the UDP settings.
Fig. 3. 25
 Click on the “COM1” link on the left hand side.
 Select UDP.
 Destination IP and Port; specify the Begin and End IP here. Four groups of IP ranges
are allowed. This is the IP address of the UDP program and the Port it is listening to.
Note that the maximum number of UDP nodes that SE5002D can handle would highly
depend on the traffic load. We have tested that SE5002D can handle up to 32 UDP
nodes (baud rate 9600 bps, request interval 100 ms, and data length of 30 bytes).
 Enter the Local Listening Port. This is the port that the SE5002D should listen to. Match
this setting in the UDP program (usually called destination port in the UDP program).