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the same network segment (unless communicating across gateways), either
directly or through a switch, as shown in figure 29.
Since ZLVircom supports cross-segment search and configuration, the IP address
that can be searched but cannot be communicated is usually not well configured.
In this case, ZLVircom can be used to configure devices in the same network
segment.
After the configuration, the Link light turns blue when the TCP connection is
established by using the steps of “4.5 TCP Communication Test” or “4.6 Virtual
Serial Port Test”. The Link light blue can also be seen through ZLVircom, as in the
device management list, if the TCP connection is listed as "established" then the
Link light is blue, as shown in figure 30, which facilitates remote diagnosis.
Figure 30 Connection status and data send/receive status
6.3 Data Sending and Receiving
When the Link light turns blue, data can be sent and received between the
software and the serial port server. If the software sends a message, the Active
light turns green for at least a second. The data is also output from the serial port
server, but whether the output data is correct depends on whether the correct
serial port parameters (baud rate, data bit, stop bit, check bit) are configured.
The serial device will reply to the right instruction. If there is a reply (the serial port
sends data to the network port), “Active” will turn blue. Otherwise, please check
the serial port parameters or the connection of the serial port line.
In order to facilitate remote debugging, ZLVircom also supports remote viewing of
data sent and received, as shown in figure 30, where TXD is the amount of data
sent by the serial port server. When refreshing the list of devices, a change in this
value indicates that data has been sent, and the Active light is also green. If you
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