Moxa VPORT 254-M-SC-T Manual do Utilizador descarregar pdf (Página 82)

VPort 254 User’s Manual System Configuration

4-38

Function

This COM port supports 2 functions: Serial Device Control and PTZ Camera Control. Each

function has different configurations.

y Serial Device Control: The VPort supports 3 operation modes when using serial device control

mode over a TCP/IP network: Real COM Mode, TCP Server Mode, and TCP Client Mode.

- Real COM Mode: The VPort is equipped with COM drivers that work with Windows

Vista/XP/2000 systems. The driver establishes a transparent connection between the host

and serial device by mapping the IP:Port of the VPort’s COM port to a local COM port on

the host computer. The important point is that Real COM Mode allows users to continue

using RS-232/422/485 serial communication software that was written for pure serial

communication applications. The driver intercepts data sent to the host’s COM port, packs

it into a TCP/IP packet, and then redirects it through the host’s Ethernet card. At the other

end of the connection, the VPort’s COM port accepts the Ethernet frame, unpacks the

TCP/IP packet, and then transparently sends it to the appropriate serial device attached to

the VPort’s COM port.

- TCP Server Mode: In TCP Server mode, the VPort provides a unique IP:Port address on

a TCP/IP network. The VPort waits passively to be contacted by the host computer,

allowing the host computer to establish a connection with and get data from the serial

device.

- TCP Client Mode: In TCP Client mode, the VPort can actively establish a TCP

connection to a pre-defined host computer when serial data arrives. After the data has

been transferred, the VPort can automatically disconnect from the host computer by using

the TCP alive check time or Inactivity timeout settings.

NOTE

These VPort COM port operation modes only support one connection at the same time.

NOTE

For more information on serial-to-Ethernet communications, refer to Moxa’s NPort Device

Server products.

y PTZ Camera Control: This PTZ Camera Control function is the same as the PTZ port. Refer

to the introduction to the configuration of the PTZ Port.

Function

Setting Description Default

Select the COM port

function

Select the application purpose of this

COM port: Serial Device Control or

PTZ Camera Control

Serial Device Control

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