Figure 3. Tcp Server Mode; Figure 4. Tcp Client Mode - Wiznet WIZ110SR User Manual

<TCP server mode>
At the TCP Server mode, WIZ110SR waits for the connection requests.
TCP Server mode can be useful when the monitoring center tries to connect to the device
(where WIZ110SR is installed) in order to check the status or provide the commands. In
normal time WIZ110SR is on the waiting status, and if there is any connection request from
the monitoring center, data communication is processed and connection is closed.
In order to operate this mode, Local IP, Subnet, Gateway Address and Local Port Number
should be configured first.
As illustrated in the above figure, data transmission proceeds as follows,
1. The host connects to the WIZ1q0SR which is configured as TCP Server mode.
2. As the connection is established, data can be transmitted in both directions – from the
host to the WIZ110SR, and from the WIZ110SR to the host
<TCP client mode>
Copyright © WIZnet All Rights Reserved

Figure 3. TCP Server mode

Figure 4. TCP Client mode

ASRB for SERIAL | 11 page