USR-N540 User Manual www.usriot.com
Jinan USR IOT Technology Limited 17 / 73 inquiry@usriot.com
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-N540 does not send data.
2) USR-N540 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-N540 at the same time once serial port
received data.
3) It supports USR Synchronous baud rate (Similar RCF2217), which can revise USR-N540 serial parameter as
baud rate accordingly. This function should be combined with USR-VCOM.
4) Support Modbus TCP function.
5) It support 8 clients connections at max.
6) Under TCP Server mode, USR-N540 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-N540 as TCP Server Mode, local port 23, same as default.
② Open ”USR-TCP232-TEST” Software, on the side of Net Settings:
Protocol: TCP Client
Server IP/Port: the same value as the device IP N540
Default IP address and type is static IP at 192.168.0.7 You can find it in the “USR-TCP232-M4_E45 setup”
software you are using.
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