
EW50 Industrial LTE Cellular Gateway
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Virtual COM Setting
The Virtual COM setting screen enables user to connect a Virtual COM port based device to the Internet,
allowing users to access serial data remotely. There are Disable, TCP Client, TCP Server, UDP, and RFC2217
modes for remote accessing the connected serial device. By default, it is configured in Disable mode.
To use the Virtual COM function, specify the operation mode for the multi-function serial port first. Go to
Field
Communication > Bus & Protocol > Port Configuration
tab, select the Virtual COM as expected operation
mode, and finish the related port configuration as well.
After that, go to
Field Communication > Bus & Protocol > Virtual COM
tab for detailed configuration of Virtual
COM setting.
Enable TCP Client Mode
You can configure the gateway as the TCP (Transmission Control Protocol) Client. In TCP Client mode, the
device initiates a TCP connection with a TCP server when there is data to transmit. The device disconnects
from the server when the connection is Idle for a specified period. You may also enable full time connection
with the TCP server.
Enable TCP Client Mode Window
Item
Value setting
Description
Operation Mode
Required setting
Select
TCP Client
.
Connection Control
Always on
is set by
default
Choose
Always on
for a TCP full time connection. Otherwise, choose
On-
Demand
to initiate TCP connection only when required to transmit, and to
disconnect at idle timeout.
Connection Idle
Timeout
1. 0 is set by default
2. Range 0 to 60 min.
Enter the idle timeout in minutes.
The idle timeout is used to disconnect the TCP connection when the idle time
has elapsed.
Idle timeout is only available when
On-Demand
is selected in the
Connection
Control
field.
Alive Check Timeout
1. 0 is set by default
2. Range 0 to 60 min.
Enter the time period of alive-check timeout. The TCP connection will be
terminated if it doesn’t receive response of alive-check longer than this
timeout setting
Enable
Unchecked by default
Check the
Enable
box to activate the corresponding serial port in specified
operation mode.
Save
N/A
Click the
Save
button to save the configuration