USRIOT USR-N520, User Manual

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TCP Client Software Configuration
3.1.2. TCP Server Mode
1) Different from UDP, in this mode, connection has status of disconnection and remaining. Connection
is still remained although USR-N520 does not send data.
2) USR-N520 listens to local port set firstly, respond and build connection when there is a connection
request. Serial port will send data to all client which connected with USR-N520 at the same time
once serial port received data.
3) It supports USR Synchronous baud rate (Similar RCF2217), which can revise USR-N520 serial
parameter as baud rate accordingly. This function should be combined with USR-VCOM.
4) It support 8 clients connections at max. (32 clients will be improved in the following.)
5) Support Modbus TCP function.
6) Under TCP Server mode, USR-N520 listens to local port actively and will not monitor connected IP
and port. When the 9
th
client is connected, the oldest one will be ticked.
7) Test Example
1
Set USR-N520 as TCP Server Mode, local port 23, same as default.
2
Open ”USR-TCP232-TEST” Software, on the side of NetSettings:
Protocol: TCP Client
Server IP/Port: the same value as the default parameter of N520
3
Click ”Connect” to test data transmission.