RS485 TO ETH ( B)
need to select Modbus TCP to RTU mode; Realcom protocol is currently only used in a
multi-serial server as a TCP client to connect to a server, and the virtual serial port is used on the
server. Time to use.
The usage is summarized as follows:
Table 6 Network configuration mode
NO.
Virtual
serial
port
Device
working
mode
Conversion protocol Description
1
Use
TCP server
None
Suitable for occasions where user
software opens the COM port to
actively collect data.
2
Use
TCP client
None
Suitable for occasions where the
device actively sends data. If you
choose a TCP server, the problem
that the device cannot reconnect
after disconnection may occur.
3
Do not
use
TCP server
Modbus TCP to RTU
Applicable to the user software is
Modbus TCP, and the user device is
Modbus RTU. And Modbus TCP is
the master station.
4
Do not
use
TCP client
Modbus TCP to RTU
Applicable to the user software is
Modbus TCP, and the user device is
Modbus RTU. And Modbus RTU is
the master station.
5
Use
TCP client
Realcom protocol
Multi-serial server as TCP client, and
use virtual serial port, it is best to
use Realcom protocol.
6
Do not
use
TCP client
None
Applicable to a large number of
devices connected to a cloud. And
in general, the cloud is a public IP
server on the Internet.
7
Do not
use
TCP server
None
Suitable for devices and computers
in the same local network,
monitoring locally, without
cross- Internet communication.
5 . 1 . VIRTUAL SERIAL PORT MODE
If the user software uses the COM port for communication, it must use the virtual serial port
mode. Including some PLC software, configuration software, instrument software, etc.
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